How the 1946-47 Wurlitzer 1015 Jukebox Works, Part 2: The Record Playing Mechanism Uncle Doug 2026-09-25 | How the 1946-47 Wurlitzer 1015 Jukebox Works, Part 2: The Record Playing Mechanism
Lets Build the Gibson GA-1RVT Part 2 (of 4)....Evaluate Cabinet, Finish Chassis, Begin Wiring Uncle Doug 2024-05-06 | In this Part 2 Video (of 4), we will receive and evaluate the Lacquered Tweed Mojotone 5E3 cabinet; complete the chassis painting, machining, and labeling.....and begin wiring the circuit, including transformers, power supply, and tremolo. There is a discussion of the possibility that this amplifier was never actually built or sold by Gibson or Maestro, as well as explanations of a Distributed Star Ground, and Distributed B+ Voltage Scheme.Here is the link to the Parts List: app.box.com/s/7n4v1lzqyev5vo05k4m4j79p47bp0k3xIf you enjoy advertising-free videos like this one (we do not monetize our videos), then please SUBSCRIBE and consider becoming a Patreon patron at patreon.com/uncledougsvintageamps or making a PayPal contribution to DLDCAM@aol.com. Thanks for watching. NOTE: If you wish to purchase an identical 5E3 cabinet from Mojotone, please use the code: UD5E3 to receive a 10% discount. Here is a source for 2-wire shielded cable: Surplus Sales of Nebraska. surplussales.com/index/Wire-Cable.html
Lets Build the Gibson GA1-RVT.....A 3-Tube Amp with Reverb & Tremolo, Part 1 of 4 Uncle Doug 2024-04-17 | I've been fascinated with the Gibson GA1-RVT circuit for many years and finally decided to build one, incorporating some updates and improvements. Although the amp has only three miniature amplification tubes (and a 5Y3 rectifier), it offers single-ended output as well as grid-bias-modulating tremolo and a tube & transformer-driven spring reverb. In this Part 1 (of 4) Video, we will discuss both the circuit and compound tubes it utilizes, then create a parts list, fabricate a chassis from 16-gauge hot-rolled steel, then machine the chassis and prepare it for painting and final wiring and assembly. Additional topics will include making a 2 Meg AT pot and color-changing LED pilot lights.If you enjoy advertising-free videos like this (we personally do not monetize our videos), please SUBSCRIBE and support our channel by becoming a Patreon patron at: patreon.com/uncledougsvintageamps or by making a PayPal contribution to dldcam@aol.com. Thanks so much for watching :)Here is the link to the Parts List: app.box.com/s/7n4v1lzqyev5vo05k4m4j79p47bp0k3xHere is the code for a 10% Discount on Lacquered Tweed Deluxe 5E3 Cabinet from Mojotone: UD5E3 Should be good for several months.
1956 5E2 Tweed Fender Princeton Amp.....in for a Stealth Overhaul Uncle Doug 2024-01-24 | This video documents the circuit repair of a really nice, original 1956 5E2 Fender Princeton amp. All the old electrolytic capacitors were replaced by inserting new caps within the original cardboard tubes to maintain original appearance. In addition we do some investigation to determine the correct circuit ID, polish the corroded control panel, and provide an audio demonstration of the finished product. Please note that at 26:00 within the video, I foolishly refer to Ajax Blue Molded capacitors as being "blue Astrons". I am eternally sorry for this gross error and apologize to Ajax for degrading their fine product ;)If you enjoy advertising-free videos like this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or make a donation of support to our PayPal account: dldcam@aol.com. Thanks !!!
Part 3 of the Suprinceton Video Series: Final Wiring, Assembly & Testing Uncle Doug 2023-12-08 | In this third and final video in the Suprinceton scratch-build series, we will complete the wiring, test the circuit, install the chassis in the cabinet, and do a final, detailed audio demonstration. Several careless oversights are remedied, but the final outcome is guaranteed to thrill and amaze all viewers :) In addition, we will take two musical drone voyages over interesting terrain and view a cavalcade of kitties.If you enjoy advertising-free videos (we do not place ads in any of our videos out of respect for our viewers) like this 3-part series, please be sure to SUBSCRIBE to our channel and consider becoming a Patreon patron at: or making a PayPal donation to: dldcam@aol.com. We sincerely appreciate your time and attention and wish you a very happy holiday season.
Lets Build the Suprinceton, Part 2: Chassis Painting, Assembly and Wiring Uncle Doug 2023-11-16 | This is the 2nd video in a 3-part video series, in which the scratch-build of Uncle Doug's Suprinceton is shown in detail, preparing it for installation in an original Supro Supreme tweed cabinet. We paint and letter the chassis, install all the components in the chassis, then begin the process of wiring all the components together into a functional circuit. Several modifications are made to the Fender 6G2 Princeton circuit, which is the basis for the build, including a switchable NFB Loop, a switchable cathode bypass cap for the second triode of V1, and a unique grounding method in which all the HV circuit grounds are connected directly to the HV Center Tap, rather than the aluminum chassis. In addition we will have a discussion of electrolysis, which can adversely affect the combination of aluminum and steel, and take three brief hot-rod-related breaks from the "drudgery" of wiring and completing the chassis. Here is a schematic of the Suprinceton circuit: app.box.com/s/4w0s4i1iwu8qz34gcqj899zq2hba2nhkIf you enjoy advertising-free videos like this one (out of respect for our viewers, we do not monetize our videos) then please SUBSCRIBE to our channel, and consider becoming a Patreon patron at patreon.com/uncledougsvintageamps or by making a PayPal contribution to: dldcam@aol.com. Regardless.....thanks for watching :)
Lets Scratch-Build the SUPRINCETON......Part One of a Series Uncle Doug 2023-10-17 | In Part 1 of this video series, we will begin to construct, from scratch, an amplifier and provide a new speaker for an empty 1954 Supro Supreme amplifier cabinet, sent to us by a viewer. All steps of the process are explained and demonstrated, from repair of the cabinet, design of the amp circuit and chassis, selection of components to purchase, construction of a sheet metal brake to form the chassis, and machining of the chassis for all components. In addition, we will take a break and go for a ride in a 1932 Ford Roadster. If you enjoy advertising-free videos (we do not personally authorize any ads) like this, please be sure to SUBSCRIBE to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps, or making a PayPal contribution to dldcam@aol.com. Without your support, videos like this would not be possible.Thanks for watching !!! Stay tuned for Part Two, which will be posted in 2 or 3 weeks.
Rare Brownface 1962 Fender 6G6A Bassman.....in for a Tune-Up Uncle Doug 2023-09-19 | In this video we will thoroughly explore a 1962 (or 1963) Brownface Fender 6G6A Bassman amplifier, with emphasis on creation of an adjustable bias pot and in-depth discussion of both NFB circuits and the Fender Presence Control. An audio demo is presented at the end of the repair segment. In addition, we will be visited by some kitties, a 1932 Ford Roadster, and a very special guitar. If you enjoy our no-ad-revenue videos, please SUBSCRIBE to our channel and consider supporting our work by becoming a Patreon Patron at patreon.com/uncledougsvintageamps or by making a PayPal donation to: dldcam@aol.com. Regardless, thanks for watching :)
1967 Fender Vibrolux Reverb with a Lazy Tremolo and too much Background Noise Uncle Doug 2023-09-06 | In this video we will reduce the unacceptably high background noise and pep up the lazy tremolo in a really nice BF 1967 Fender Vibrolux Reverb. Both of these complaints seem rather common, so hopefully this video will provide some solutions for viewers. In addition there is a discussion on output tube mismatch. If you enjoy videos such as this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at patreon.com/uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. The kitties and I would really appreciate it :) In addition, Patrons get early access to all our videos and sole access to the original audio demo music files.NOTE: During the entire audio demo, the NFB was switched "off", providing some early breakup at the rather modest volume setting of 3 in the final three tunes. I felt that the slightly mismatched output tubes sounded great and left them in the amp.
Restoration of a Wurlitzer 1015 Jukebox Sound System Uncle Doug 2023-08-28 | In this offbeat video, we will completely restore the sound system of Wurlitzer's most popular jukebox: the 1946-1947 Model 1015. Starting with conversion of the tonearm to track properly with a modern diamond ceramic cartridge, we will then rebuild the amplifier and volume control box, modifying them to provide optimum tone and volume with the modern cartridge, concluding with proper biasing of the 6L6 output tubes. Throughout this process, circuit diagrams will be analyzed and each step will be explained. An audio demo of the final product will be provided using guitar input. At the conclusion we will feature a video provided by a talented viewer, William Bock, demonstrating his hand-built Valco 6161 amplifier. He can be reached on Instagram at instagram.com/old_currents_amps?igshid=MmIzYWVlNDQ5Yg== and his YouTube Channel link is youtube.com/@Warfratcoonhound?si=6OziIwvgRmEdLtRL . Please address any inquiries to him personally. Thanks !!If you enjoy videos like this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at patreon.com/uncledougsvintageamps or making a PayPal donation to dldcam@aol.com. NOTE: We receive NO advertising revenue and rely strictly upon our viewers for support.I have posted other videos featuring this particular jukebox: youtube.com/watch?v=htbN7-vxUbg and youtube.com/watch?v=KM5bA6c7mQo&t=2s
1963 Fender Brownface Vibroverb Amp......Rare, Valuable, and Worth Every Dime !! Uncle Doug 2023-04-27 | In this lengthy and complex video we will thoroughly inspect, discuss, and repair an ultra-rare 1963 Fender Vibroverb Amplifier. The discussion will include a review of the very unusual circuit and a comparison of the Brownface and Blackface versions. Numerous repairs are necessary including the replacement of the incorrect output transformer, electrolytic capacitors, rectifier and output tubes, and reverb tank transducers. A detailed audio demonstration will be provided which will include both channels and various settings of the reverb and tremolo effects. If you enjoy videos such as this one and would like to help support our channel, which accepts NO advertising revenue, please become a Patreon patron at this link: patreon.com/uncledougsvintageamps or make a PayPal contribution to dldcam@aol.com. The cats and I would really appreciate it. NOTE: I have received some useful information regarding accurate dating of Fender transformers and chokes. The "125A9A" style of designation is Pre-CBS, while the "022855" designation style is Post-CBS. Use this info to correct a mistake I made in the video :) Also, please note just how unreliable tube testers are when measuring the functionality of output tubes. Like capacitors, unless tested at full operating voltage and current, the measurements are often inaccurate.
BF Super Reverb in for a Tune Up.....Botched Wiring & Bad Tubes.....but a Happy Ending Uncle Doug 2023-03-17 | In this video we will document the repair of a 1966-67 Fender Blackface Super Reverb circuit. As delivered, it had some serious wiring issues and worn-out tubes, including a 5U4 rectifier, rather than the proper GZ34. These problems allow for a discussion of repair theory as well as demonstration of the relative performance of the 5U4 vs GZ34, both with and without a Current Limiter in series. A demonstration of tremolo speed reduction is also provided. As usual, an audio demo is performed, including each of the effects......tremolo and reverb.....at various levels. We hope you enjoy it.If you do enjoy our videos and would like to support our channel, please consider becoming a patron of our channel via Patreon: patreon.com/uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. Thanks !!!
Is the Conversion of a AA-165 Bassman to AA-864 Specs Worth the Effort ? Uncle Doug 2023-01-16 | The AA-864 Fender circuit is the most respected of all the Blackface Fender Bassman circuits, and other circuits are often converted to AA-864 specs. In this long and rather complex video we will first overhaul a mint original AA165 Bassman circuit to optimize its audio performance. Then we will convert the circuit to AA-864 specifications and provide an AB comparison of he two circuits. Audio comparisons will include 1.) The Normal Channel of both circuits 2.) An AB comparison of the AA-165 vs AA864 Bass Channels 3.) An AB comparison of both circuits with equal gain. In addition, we will open an incredible gift, be visited by Mitzy, enjoy a product evaluation, and have more fun than a barrel o' monkeys ;). See Table of Contents (below).If you enjoy videos like this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com Thanks for watching :)Video Table of Contents:0:00 Open Box1:33 Chassis Revealed and Examined4:36 Read Letter6:11 Identify Circuit13:48 Explain the Plan for the Experiment15:34 Overhaul and Optimize AA-165 Circuit17:07 Break: Open Fabulous Gift22:51 Resume Overhaul of AA-16545:50 Break: Product Review47:20 Begin Conversion to AA-8641:03:35 Audio Demo of Normal Channel Both Circuits1:06:46 AB Comparison of Bass Channels with Discussion1:15:25 AB Comparison with Equal Gain in Both Channels and Discussion1:19:59 Farewell Comments
The nicest Tel-Ray Super Organ Tone I have ever seen.....or heard. Uncle Doug 2022-09-11 | This started out as a regular amp-repair video, but when I opened a viewer's gift box, the contents were so impressive (and unusual) that I decided to feature it instead of the amp repair. As you will see, it arrived in urine-soaked disrepair, but rapidly cleaned up to be virtually "show room" new......both in appearance and performance. This is a rare opportunity to both see and hear a pristine version of this rare electromechanical effects device. If you enjoy videos like this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. As mentioned in the video, you can also support our channel by donating vintage gear to be repaired and featured in a video, then sold to viewers. Please NOTE: I no longer repair oil can devices, simply because of the possible toxicity of the old oil and the inability to obtain replacement parts necessary to restore proper function. Hopefully, my videos will assist you in the repair of your own T-R Oil Can units.
Virtually Mint 1966 Fender 6G15 Reverb Unit.......It Quit Reverbing :) Uncle Doug 2022-08-09 | In this long and complex video, we will examine, repair, and thoroughly test a super nice, one-owner 1966 Fender 6G15 Reverb Unit. I have provided a detailed table of contents to allow viewers to select and view individual topics if necessary. Emphasis was placed upon 1.) Close examination of the unit to assist those who desire to build their own at home. Here is a link to my own revised 6G15 schematic, parts list, construction and layout diagram: app.box.com/s/iad551xa97auao2anl7tpn7xyhb3y4ad 2.) Concealment of the new filter caps 3.) Transplantation of new transducers into the original Gibbs tank 4.) Thorough audio testing of original Gibbs tank, repaired Gibbs tank, and repaired 6G15 unit.....with comparison of 6K6 and 6V6 tank-driving tubes. Here is a link to the video featuring the AO-35 Conversion Amplifier feature in the video: youtu.be/GVLRmCbPfbs If you enjoy videos like this, please SUBSCRIBE to our channel, and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. Thanks so much for your time and interest.CORRECTION: "606" on the transformers refers to the maker, Schumacher, not to a date of manufacture.
Pristine One-Owner 1965 Fender Bandmaster Recovers from Laryngitis Uncle Doug 2022-07-08 | In this action-packed video we will repair an absolutely pristine, one owner 1965 Fender Bandmaster that has been silent for the past 5 years. In addition we will discuss methods to determine if coupling caps are leaky, get a Mitzi (the Workshop Kitten) update, engage in guzzling of liquids when a key word is spoken, lose our fear of my pointing at circuits, perform an experiment, and all sorts of other mayhem and foolishness. If you enjoy videos like this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. Thanks for watching :)
Victoria Clone of a Fender Tweed 5F4 Super Amp Uncle Doug 2022-06-16 | This video features a beautifully built Victoria clone of the rare and wonderful Fender 5F4 Tweed Super Amp. The owner complained of "fizziness", fluctuation of volume, and possible red-plating of one tube. Join us as we undergo a very cautious, methodical elimination of all possible issues and arrive at a (hopefully) satisfactory resolution. We also install an 8 Ohm speaker output jack and a switchable NFB Loop. In addition we will open a fabulous gift from a generous viewer, check in on Mitzi, the voracious feral kitten, and get some tree pruning tips from an obviously skilled neighbor.If you enjoy videos like this one, please be sure to SUBSCRIBE to our channel, consider making a PayPal contribution to dldcam@aol.com, or becoming a Patreon patron at: patreon.com/uncledougsvintageampsThanks so much for watching :)
Highly Modified 1967 Princeton Reverb Returned to (more) Original Condition Uncle Doug 2022-05-22 | This video features a highly modified 1967 Fender Princeton Reverb that was sent to us for restoration to more original specifications. The procedure provided the opportunity to discuss several topics in detail: 1.) The design and implementation of Pentode/Triode switches 2.) Capacitor Time Constants and their effect upon tremolo speed (very basic discussion with analogy). 3.) DPDT switch theory 4.) Tremolo Footswitches.....does your Fender amp need one, and why? 5.) What is the purpose of Screen Resistors? In addition, we will open some birthday gifts from generous viewers and you will meet Mitzi, the latest addition to our feral cat menagerie.If you enjoyed the video and would like to help support our channel, please consider making a PayPal contribution to: dldcam@aol.com or becoming a Patreon patron at: patreon.com/uncledougsvintageamps NOTES: I apologize for the brief autofocus failure during a portion of the screen resistor presentation. I realize that 1967 was not "Pre-CBS" but the circuit design did predate their takeover.
1946 Fender Princeton Woodie Amp.....Rare, Valuable, and Really Nice !! Uncle Doug 2022-03-20 | Talk about a historic amp......this 1946 Princeton represents the very first of Leo's masterpieces. Although quite simple in design, the excellent quality and tone that made Fender a legend are already evident. We thoroughly inspect the little guy inside and out, then repair what needs repairing, including a discussion of circuit variations and design, then proceed to an audio demo using both the 6V6 indicated by the schematic and a 6K6, which came in the amp from the owner. In addition, we will open a viewer gift that promises to provide a video of its own, see Jack in action, and have a brief historical review of the three different models of Fender "Woodie" amps.If you enjoy videos like this please SUBSCRIBE and consider becoming a Patreon patron of our channel at this site: patreon.com/uncledougsvintageamps or making a contribution of support for our channel via PayPal account dldcam@aol.com. Thanks !!
Amazingly Original Pre-War OAHU Amp Gets a Tune-Up Uncle Doug 2022-03-01 | As a change of pace from giant Fender Twins, I thought you might enjoy joining me for the evaluation and repair of an absolutely stunning pre-war Oahu (Valco) amplifier. We inspect the amp thoroughly, inside and out, discuss the very early and unusual tube set and the evolution of rectifier tubes, then begin a step-by-step repair of the somewhat troublesome circuit utilizing a typically inaccurate Valco schematic. Once the repairs are completed, the amp is subjected to an audio test to demonstrate its surprisingly good tone. In addition, we have an exciting announcement around the middle of the video that will be particularly interesting to loyal viewers and subscribers.....so don't miss it !!If you enjoy videos like this one and would like to support our channel, please SUBSCRIBE and consider becoming a Patreon patron at this link: patreon.com/uncledougsvintageamps or making a contribution to our PayPal account: dldcam@aol.com.Here is the site for the cloth-covered 3-wire power cord: grandbrass.com/12ft-brown-cloth-covered-18-3-svt-3-prong-grounded-cordset-with-molded-plugFinally: Don't fret about the exposure of the gift card number......the card was used up (by Jack, ordering gourmet catnip) long before the posting of the video ;)
Early 1950s CONN StroboTune Model ST-2.......What a Miraculous Device !!! Uncle Doug 2021-12-15 | A generous viewer sent us this ancient device and I was so impressed with its design and performance that I just had to make a video of it. We first review the overall design and circuitry, using a schematic to gain insights into how it functions, then test its accuracy against a modern guitar tuner and signal generator. I think you'll be just as amazed as I was at its complexity and performance, especially since no repairs were required after over 70 years of existence. I do, however, intend to replace the electrolytic caps and install a 3-wire power cord. NOTE: This is a relatively short, change-of-pace video and I really hope you enjoy it.If you enjoy videos like this and would like to support our channel, be sure to SUBSCRIBE, and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal donation to: dldcam@aol.com. Thanks so much for watching. Have a wonderful Christmas and New Year !!!
1965 Fender Bassman AA/AB165 Hybrid.......Schizophrenic but Sweet :) Uncle Doug 2021-12-07 | This video features the rather extensive repair of a very unusual 1965 Fender Bassman with features specific to both AA-165 and AB-165 circuits, including several "unfinished" circuit characteristics. The initial issue was a completely fried 6.3VAC center-tap, but during its evaluation and repair, other unusual circuit peculiarities were discovered. Join us as we explore and repair this unique circuit. Additional topics include alteration of the NFB circuit and use of the Polarity Switch to make it switchable, discussion of hum cancellation in 6.3VAC filament wiring, repair of my damaged Eurotubes bias probes, and modification of the Bass Channel tone stack to improve tone and favor guitar use for the customer.If you would like to support our channel, please SUBSCRIBE and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. We receive absolutely no ad revenue from our videos and rely upon our viewers for support. Thanks for your time and consideration.Additional NOTES: 1.) The midrange tone control idea was deemed unnecessary. 2.) The audio demo was done with single-coil pickups (as Leo intended), NFB "off", and Tone Controls at neutral (5) position. 3.) The fact that the modified 6.3VAC circuit withstood hours of circuit and audio testing justifies, IMO, retention of the original power transformer.
1965 Fender Showman.......Back from the dead, but not without an epic struggle Uncle Doug 2021-10-18 | This feature-length video chronicles the repair of an immaculate 1965 Fender Showman amp that literally "died in action". The video itself took almost a month to complete.....and, as you will see, has more twists and surprises than a ride home from Chappaquiddick Island. To verify our success, we present an audio demonstration of its newly restored "voice", featuring Jack & Ollie, fresh from their triumphant tour of Salvador's Seafood Heaven......from which they have been banned for life ;) We hope you find it both amusing and informative.If you enjoy videos such as this one, please SUBSCRIBE to our channel and click on the bell to receive notice of each new posting. Also, please consider supporting our channel by becoming a Patreon patron at patreon.com/uncledougsvintageamps or making a contribution to our PayPal account: dldcam@aol.com. Have you seen the price of catnip lately ?? Thanks !!
1955 Fender Tweed Harvard Amp.....Not All Amps went to Princeton :) Uncle Doug 2021-08-30 | This video features a 1955 Fender Tweed Harvard Amp......quite rare and in very nice, original condition. As usual, we check it out cosmetically, discuss the place that it filled in the Fender line-up, and then overhaul the circuit for maximum performance with minimal disruption of originality. Despite replacement of rectifier and output tubes, filter caps, coupling caps, selenium rectifier, power cord, etc. the plate current remained quite low (6 mA), implicating the power transformer as the most likely culprit. In order to preserve originality, however, I extensively modified the bias circuit to achieve a PC of 31.5mA with a relatively low PV of 215 VDC for a PD of 6.8W.....approximately 60% of max. The audio demo seems quite acceptable with good tone and volume, but a final determination on the PT will be left up to the owner. NOTE: Although the Harvard circuit normally operates at a relatively low PV of 325VDC (compared to other Fender circuits), this circuit's PV is about 100VDC below this level. I have no idea if the seemingly-original power transformer is incorrect (for foreign use?), slightly defective, or operating properly (with no other Harvard circuits to compare). If you enjoy videos such as this, please SUBSCRIBE to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. Thanks so much for watching :)
1950 Fender Super Amp: Naked and Thrashed but still SUPER !! Uncle Doug 2021-06-28 | This video features the repair of a heavily used, but rare and wonderful 1950 Fender Super Amp.....favorite of Billy G. Although it had already been recapped, the tone was awful, the output transformer was flapping in the breeze, and the wiring looked like linguini after a hurricane ;) Through careful replacement of key capacitors, the tone was restored, the wiring replaced (as needed), and the OPT repaired. With the help of Ollie & Jack, we will audio test the final result, as well as open a splendid box o' tubes from Sweden, and share some valuable basic concepts. The icing on the cake, however, will be the final, very special video that has never been shared with viewers, featuring my late, beloved workshop partner and pal.If you enjoy advertising-free videos like this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. Thanks so much for watching :)
1966 Marshall JTM-45 Mk II in for Repairs......A Rare and Wonderful Gem !! Uncle Doug 2021-05-28 | This video documents the repair of a splendid 1966 Marshall JTM-45 MkII amp sent to us for repairs. The initial problems cited were a "gap" in one of the volume controls and a tendency to "red-plate".....but, as you will see, other issues arose. Also, due to the "special nature" of this wonderful old amp, we sought to make component substitutions as unobtrusive as possible. In addition, we open some gifts from a very generous viewer.....with Jack and KC's help, of course.....and feature a second video showing one method to repair a "scary" problem in a BF Super Reverb. Thanks to all our Patreon patrons and PayPal contributors for your continued support, and to all of you who helped us reach the lofty goal of 100,000 Subscribers !!! Way back when we posted our first video on YT, we never dreamed things would turn out this way......and they would not have, without our wonderful viewers. Thanks for making this such a rewarding experience.If you would like to support our channel, please consider becoming a Patreon patron at patreon.com/uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. Regardless, we really appreciate your time and interest in our channel.
1965 Fender Blackface Deluxe Reverb needing Tremolo and Reverb Repair Uncle Doug 2021-03-25 | This video features one of Fender's greatest achievements, the BF Deluxe Reverb. The chassis arrived in excellent cosmetic condition and required a full recapping, biasing of output tubes, and a rather challenging repair of both the Tremolo and Reverb effects. If your DR has problems in these areas, this video will explain how to track down the cause. Naturally, at the conclusion of the repair segment we thoroughly test all amp functions and provide an audio demonstration.In addition, with Jack & KC's help, we will open two gift boxes from a very generous Canadian viewer and then proceed to the Part 2 video in which I will discuss the evolution of the Tweed Deluxe amp circuits, beginning with the 5A3 and ending with the magnificent 5E3. If you enjoy advertising-free (so far) videos like this one, please subscribe to our channel and consider providing support as a Patreon patron at or by making a PayPal contribution to dldcam@aol.com. Thanks so much for watching :)
1977 Morley Evo-1 Oil Can Echo-Delay Pedal......Complete Overhaul & Test Uncle Doug 2021-02-13 | Jack & I were flattered recently when the Morley company asked us to restore one of their 1977 Echo-Delay Pedals, which uses a Tel-Ray-style oil can unit to produce some really incredible effects. This video documents the entire procedure including disassembly, cleaning, reassembly and repair.....with with a detailed discussion of design and operating theory, history, and an audio demonstration of the echo-delay effect in stereo. In addition we will be visited by Ollie, Jack, and KC at various times during the video to break up the monotony ;)If you enjoy advertising-free videos like this one, please SUBSCRIBE to our channel and help us reach the 100,000 subscriber threshold. Also, you can help support our channel by becoming a Patreon patron at patreon.com/uncledougsvintageamps, or by making a PayPal donation to: dldcam@aol.com. Thanks so much for watching.Here is a link to the Premier Guitar (I mistakenly said Vintage Guitar in the video.....sorry ;) story featuring the Morley Evo-1: premierguitar.com/articles/The_Mighty_Morley_Evo_1For those interested in further pursuing the history and design of Morley delay pedals, the company has provided the following patent numbers to assist your research:US Patent number 2,892,898 (Delay Apparatus, filed Feb. 21, 1958, granted June 30, 1959)US Patent number 3,072,543 (Dielectric Signal Storage Device, filed Oct. 8, 1958, granted Jan. 8, 1963)US Patent number 3,215,911 (Electrostatic Storage System, filed Sept. 5, 1961, granted Nov. 2, 1965)US Patent Number 3072543 A Dielectric signal storage device (Rotating Sound Synth)
1955 Fender 5E9 Tremolux in near MINT Condition.....Wear a Bib !! Uncle Doug 2021-01-17 | This video features the nicest, completely original 1955 Fender 5E9 Tremolux that I have ever seen. It's the first year of issue for the Tremolux and this one is serial number is 00060, so you do the math. The owner has asked for a concealed (in original cardboard covers) replacement of all electrolytic capacitors, testing of the non-polar caps and resistors, testing of the original Jensen speaker, and biasing of the 6V6 output tubes. Following all the repairs, we will have our traditional audio demo, but at higher fidelity than previous videos. Also, the demo will be done with single coil pickups, just as Leo intended.In addition, we will open some great Christmas gifts from generous viewers, and have a special Part 2 video showing how to build your own amp chassis stand (with blueprints), followed by a detailed evaluation of a commercially available chassis stand from Mojotone.If you enjoy advertising-free videos like this one, be sure to SUBSCRIBE to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. Here is the link to the design drawing for the homemade amp chassis stand: app.box.com/s/9r0kof6ycbu07ew1wmlaaussi7eychm6Here is a link to the Mojotone stand evaluated in the Part 2 video:mojotone.com/amp-parts/Chassis-Stands While you're there, take a look at their really nice amp kits, pickups, chassis, etc.
1965 BF Fender Super Reverb in for a Check Up......Plus BF vs SF S.R. Circuits Uncle Doug 2020-12-20 | In this video we will carefully inspect a really nice 1965 Blackface Fender Super Reverb and perform the necessary repairs to ensure great tone and reliability. Afterwards, we will perform a lengthy audio test to verify the success of the repairs. In addition, we will visit Ollie in her new home, open a great gift package, paint a zombie-resistant fence, and get a visit from Jack himself. The Part 2 video is a detailed circuit comparison of Blackface and Silverface Super Reverbs, including the evolution of the circuit and how to get BF tone from a SF circuit.....and save a fortune.If you enjoy videos such as this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. Thanks for watching :)If you want to read more about the evolution of BF and SF Fender circuits, be sure to visit the Fenderguru.com website. It has a huge amount of very clear and helpful information.
The Effect of Output Tube Bias on Tone, Gain, and Headroom.....A Side-by-Side Comparison Uncle Doug 2020-12-04 | There is a lot of conflicting information on the Internet regarding the effect of output tube bias on amplifier tone, gain, and headroom. In this video, I will set up comparisons to allow us to determine once and for all, what the truth really is. Using digital recordings at 40%, 50&, 60%, and 70% of max PD for grid-biased 6V6's, we will audibly determine the relative tone quality, then using an audio editing program we will analyze respective gain for each percentage, then using an oscilloscope we will measure the output power of the amp, just prior to the onset of clipping, at each bias percentage to see if output power (i.e. volume or headroom) is related to bias.In our second feature we will analyze in detail, the differences between the classic AB-763 Blackface Deluxe Reverb circuit and each of the circuits found in the Silverface models made from 1967 to 1977. We'll see which SF changes should be reversed to achieve BF tone, and which should not.If you enjoy advertising-free videos like this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at patreon.com/uncledougsvintageamps or making a PayPal contribution to account: dldcam@aol.com Thanks so much for watching and supporting our channel.I am indebted to the http://fenderguru.com website for some of the schematics and insights presented in this video. Do yourself a favor and check out their excellent site for a wealth of information regarding vintage Fender amps.
1960 Silvertone 1432 Amp.....In for a Complete Overhaul & Evaluation Uncle Doug 2020-11-18 | This advertising-free video features a really nice, original 1960 Silvertone 1432 amp, sent by the owner, a performing musician, for a complete overhaul to assure maximum reliability and tone. All the electrolytics, Sangamo capacitors, several out-of-spec resistors, and the tired old 12" Alnico Rola speaker were replaced. There is a before and after comparison of the old speaker vs new, and a full audio demo with the new speaker, featuring humbuckers vs single coils in both inputs plus 3 demos of the excellent Tremolo effect. In addition, we will open 2 gift boxes and take a musical drone flight overlooking El Paso, TX and Juarez, Mexico. If you enjoy advertising-free videos like this, please Subscribe to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to account: dldcam@aol.com. Thanks so much for watching :)
1955 Fender Tweed 5E2 Princeton Amp......One Owner and Wonderful !!! Uncle Doug 2020-11-03 | This video features the restoration of a beautiful old one-owner 1955 Fender 5E2 Princeton tweed amplifier. Due to its complete originality, I carefully concealed each new component within the outer container of the original components, resulting in a complete overhaul that still looks exactly as it did before the work was done. We will then perform a detailed audio demonstration of the amp's two very different inputs (1 & 2) with single-coils and humbuckers......both pickups and bridge only. The Part 2 video will be a review of the evolution of single-ended Princeton amps from the first wooden-cased 1946 model up to the final 5F2-A narrow-panel version offered from 1957-1960. CORRECTION: The impedance of Input No. 2 is actually 136K, not 1136K. Sorry.If you enjoy advertising-free videos like this one, featuring vintage tube amplifiers, please SUBSCRIBE to our channel and consider becoming a Patreon patron at : patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. Thanks so much for watching and supporting our channel.
1940s DeArmond Electromechanical Tremolo Unit.....DeAd on DeLivery !!! Uncle Doug 2020-10-14 | After years of hunting for a genuine DeArmond Tremolo, and even scratch-building two clones, I finally got the opportunity to work on a real one. The unit as received had a functioning motor, but nothing else worked.....so it was a great excuse to completely disassemble the unit, replace the power cord and Intensity pot, refill the little brass pot with "Magic Tremolo Fluid", adjust the mechanism and add a spring to retain the eccentric wheel against the tapered drive spindle. Naturally, once completed, a full audio test was done to verify the function of the Speed and Intensity adjustments.The second video features an in-depth tour of the two electromechanical tremolo clones I built, with a demonstration of their operation at different speeds. If you enjoy advertising-free videos like this one, Please be sure to SUBSCRIBE to our channel and consider becoming a Patreon Patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. Thanks !!!!Below you will find links to 3 magazine articles on the DeArmond Tremolo, and YouTube videos featuring both of my EM clones, with audio demos:vintageguitar.com/18545/dearmond-tremolo-controlpremierguitar.com/articles/Late-1940s_DeArmond_601_Tremoloreverb.com/item/104023-dearmond-601-tremolo-1940sMy first version of the DeArmond Tremolo, made before I had my own YouTube channel: youtube.com/watch?v=lNJzm7dwf9wMy second version of a homemade DeArmond Tremolo: youtube.com/watch?v=BJn66qKglxE
1968 Fender AB763 Twin Reverb: Evaluation, Modification, Extended Audio Demo Uncle Doug 2020-09-27 | This video features a 1968 Fender AB-763 Fender Twin Reverb (a black-face circuit in a silver-face cabinet). The amp was recently purchased and sent directly to me by the owner for a complete evaluation, tune up, and modification, as-needed. The prior work appeared to be of good quality, so I focused on testing and replacing components as needed; installing and biasing a new Quad of 6L6GC's, rewiring the primary AC circuit and creating a switchable NFB loop with the Ground toggle, and slowing down the Tremolo. To prove functionality, we performed an extended audio demo, with 21 different tunes utilizing all possible combinations of inputs, channels, guitar pickups, reverb, and tremolo.In addition, our Part 2 Video features a drone flight into a rocky canyon to an ancient rock house, with a comparison of this house to more recent ones which have "sprung up" in the neighborhood ;)If you are interested in viewing a Technical Video explaining the theory and practice of biasing double and quad-ended amps, here is the link: youtu.be/c5XEJeh8TCQIf you enjoy advertising-free videos like this one, be sure to SUBSCRIBE to our channel and consider becoming a Patreon patron at patreon.com/uncledougsvintageamps or making a PayPal contribution to dldcam@aol.com. Thanks for watching !!!
How to Bias a Quad or Quartet of Output Tubes......Theory and Practice Uncle Doug 2020-09-21 | In this technical video, we will discuss the theory and practice of how to bias a quad or quartet of output tubes. Basic biasing theory is covered, then applied to a double-ended pair of output tubes, for review, then finally applied to a matched quad set of output tubes. Calculations are discussed, as well as proper maximum plate dissipation values, and how they apply to cathode-biased and grid-biased circuits. In addition, safety practices are fully explained and encouraged. For a hands-on demonstration of this biasing technique being applied to a Fender AB-763 Twin Reverb, please click on the link below, in the video description. NOTE: This video depicts a manual method to bias quad amps. If you are fortunate enough to own a Eurotubes Bias Probe, you can simply "march it down the line" of the four output tubes and read the biasing data for each individual tube......eliminating the shortcomings associated with "average" PD for each pair. Also, my suggestion to use the PV to detect disparity in a parallel pair won't work. Since the tubes are parallel, the PV will always be the same for each. If you enjoy advertising-free videos like this one, please be sure to SUBSCRIBE to our channel and click on the bell to be alerted each time a new video is posted. Also, please consider becoming a Patreon patron of our channel by visiting this link: patreon.com/uncledougsvintageamps or making a PayPal donation to: dldcam@aol.com. Thanks so much for watching !!!Link to Fender Twin Reverb video which demonstrates the biasing of quads: youtu.be/veoTkXAgUj8
1954 Gibson GA-77 Amp: Some Challenges and Some Great Tone Uncle Doug 2020-09-13 | This video features a very clean, original 1954 Gibson GA-77 amp that was sent to us for a complete "tune up". All repairs will be covered in detail as well as a couple of very strange circuit features that I have not personally ever seen before. A thorough audio demo is provided to verify the efficacy of the repairs. In addition, we will open a great gift from a viewer, enjoy a visit from Jack and KC, and finally, take off on a musical drone flight to an elevated relic from my ancient high school days.If you enjoy advertising-free videos such as this one, please SUBSCRIBE to our channel, click on the bell icon to receive notification of each new posting, and consider supporting our channel by becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal donation to: dldcam@aol.com. Thanks so much for watching :)
1963 6G7-A Fender Bandmaster with 5-Triode Harmonic Tremolo......Mint !! Uncle Doug 2020-09-03 | This video features a rather rare 1963 Blonde Fender Bandmaster with the 6G7-A circuit that includes the most elaborate of all of Fender's "harmonic tremolos". The circuit utilizes 5 triodes to achieve a dramatic tremolo effect with some frequency modulation to provide a most unusual tone. The amp itself was recently bought and shipped to me for a full check-up. It was in excellent original condition and responded well to some rather minor repairs. We will have a brief discussion of the evolution of the Bandmaster circuit and cabinet coverings. After the repairs are concluded, there will be a full audio demonstration of varying control and "Vibrato" settings. Also, we will open some presents from generous viewers and take a musical drone flight to McKelligon Canyon Park. I hope you enjoy it :)If you enjoy advertising-free videos like this one, please SUBSCRIBE to our channel and consider becoming a Patreon patron at the following link: patreon.com/uncledougsvintageamps or making a PayPal donation to dldcam@aol.com. As a bonus, Patreon patrons are provided with early access to all videos and unprocessed audio demo files. Thanks so much for watching.
1966 Tweed Fender Vibro-Champ......A Real Challenge to Repair Uncle Doug 2020-08-09 | This lengthy and rather complex video covers the trials and tribulations presented by a 1966 Fender Vibro-Champ in a tweed cabinet (see the video). Because of the difficulties encountered, there are many helpful and informative repair techniques, such as: 1.) Correcting ultra-high tube bias 2.) Silencing both 120Hz and 60Hz hum 3.) Correcting single-wire 6.3VAC filament wiring 4.) Power switch replacement 5.) Installation of a new can capacitor 6.) Proper installation of an oxblood grille cloth.....and several other procedures, including good packing and shipping methods. In addition, we will have a brief overview of the evolution of Fender tweed cabinets. The audio demo has a nice, but hopefully-not-too-distracting photo montage, including baby pics of Jack and before-and-after pics of K.C. Finally, we will go for a drone flight off of a steep mountain highway, with vertigo-inducing altitude and a special backing track.If you enjoy advertising-free videos such as this one, please SUBSCRIBE to our channel and consider becoming a PATREON patron of our channel at this link: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com THANKS !!!If you like vintage cars, trucks and hot rods, please visit our second YT channel: Uncle Doug's Hot Rod Garage Thanks !!!
1966 Fender Blackface Super Reverb: In Storage for Almost 40 Years !! Uncle Doug 2020-07-27 | This video features the repair and testing of an immaculate 1966 Fender Blackface Super Reverb amp. Essentially a Deluxe Reverb on steroids, it combines the wonderful tone and flexibility of the DR with the significantly higher power of two 6L6GC output tubes and 4 x 10" speakers. The featured amp was in storage for about 40 years and required a complete overhaul to function as well (or better) than new. Follow each step in the procedure and judge for yourself when you hear the audio demo.In addition: We will open a fabulous gift box and make a MOMENTOUS ANNOUNCEMENT.....so be sure to watch the entire video to avoid missing out.If you enjoy advertising-free videos like this one, then please SUBSCRIBE and click on the bell icon to receive notification of future postings. Also, please consider becoming a PATRON of our channel at: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com.Link to our new YT channel: Uncle Doug's Hot Rod Garage: youtube.com/channel/UCqCH6Ejn3fbv5_Mjj-2ZhTQ
1968 Fender Bassman AB165 gets Caps, Tubes, and a Dynamite Switchable NFB Loop Uncle Doug 2020-07-09 | This video features a really nice 1968 Silverface AB-165 Bassman in a head cabinet. It required a complete re-capping, new Remote Speaker jack, new 3-wire power cord, new output tubes, and, best of all, a switchable NFB loop that really works !! In addition, we will take a drone flight over an area of red sand dunes near where I live, accompanied by a really nice tune from viewer, Jim Suber. His tone and touch are exceptional, in my book.If you enjoy advertising-free videos like this one, please subscribe to our channel and gain access to over 300 more educational, entertaining videos. Also, please consider helping to support our channel by becoming a Patreon patron at: patreon.com/uncledougsvintageamps or by making a PayPal contribution to: dldcam@aol.com. Thanks so much for watching :)
1963 Brownface Fender 6G3 Deluxe......An Absolute Beauty, in for Repairs Uncle Doug 2020-07-02 | This video features a rare and wonderful Brownface 1963 Fender Deluxe Amp, with the 6G3 circuit, in the workshop for a tune up. Highlights include a bias supply overhaul, primary circuit re-wiring, Tremolo speed reduction, and creation of a switchable NFB loop. At the end of repairs, a detailed audio demo session is provided, courtesy of Jack & Ollie, the furry troubadours.Our Part 2 video is a trip to the unique and interesting foothills of Mt. Cristo Rey in Sunland Park, NM. Your crazy old uncle has some fun hiking on dusty, historic trails, explaining strange geological structures and briefly discussing his origins in the sunny Southwest.....all to be taken with a grain of salt ;)If you enjoy advertising-free videos like this one, please be sure to subscribe to our channel, and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a contribution of support to PayPal account: dldcam@aol.com Regardless, we appreciate your time and interest and wish you the very best :)
Late-40s Mirovox Guitar Amp.....In for Repairs at Rustys Workshop Uncle Doug 2020-06-13 | This video features a very uncommon but attractive late-40's Mirovox amp that arrived on our workbench with several issues related to a hair-trigger volume control, inadequate tone control, hot 6V6 tube bias, and an out-of-place, improperly wired output transformer. After showing and testing each repair, we turn the amp over to Ollie & Jack for their traditional audio testing session. As if this were not enough, we do a media search for information on Mirovox amps, open some gifts, and engage in a philosophical discussion regarding the vicissitudes of desert weather.Our second feature is the Part 2 (and final) installation of an all-new front suspension on a 1930 Model A coupe. At the end, you will see it in all its "glory" ;)If you enjoy advertising-free videos like this one, please subscribe to our channel and consider becoming a Patreon patron at this link: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. Thanks so much for watching !!
Magnatone 280A (Noble 990)......in Gorgeous Original Condition Uncle Doug 2020-06-04 | In this video we will perform some basic repairs on a beautifully original 1958-60 Magnatone 280A (sold by Noble as their "Symphonic" Model 990). In an effort to maintain maximum originality, the owner requested that only faulty parts be replaced. Areas requiring repair were the -DC bias circuit, power cord and primary wiring, output tube balancing and biasing, and the failure of 2 of 4 cabinet speakers to produce any sound. We will review some interesting design features of the circuit and produce a stereo recording of the audio demonstration, using two completely different speakers.In addition, we will witness a youthful Jack mastering the art of mop surfing, and see Part 1 of a video series featuring the upgrading of the entire front suspension of a chopped & channeled 1930 Ford coupe.If you enjoy advertising-free videos like this one, please subscribe to our channel, and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal donation to account: dldcam@aol.com. Thanks for watching :)Here is a link to a previous Magnatone video in which the function of the "true" Vibrato circuit is explained: youtu.be/tFXrJEwlsNg
1967 Fender Bandmaster: FINALLY.....A Cooperative Patient Uncle Doug 2020-05-19 | After a long run of nightmarish repair challenges, I finally encounter an amp that responds well to my efforts: a beautiful, completely original 1967 Fender Bandmaster. After routine replacement of electrolytic caps and several carbon comp resistors, rewiring of the primary circuit, tremolo and bias supply tune ups, and output tube biasing, it sounds like a million bucks. No previous botching, continuous disasters, failing tubes and transformers, inexplicable hums and crackles, smoke or explosions......it simply emerges from surgery in perfect shape, ready for many more years of service to its lucky owner.In addition, we will visit Jack and KC during their "cat naps", and take a ride in a 1934 Ford pickup with newly installed tunnel ram and dual Holley carbs.If you enjoy advertising-free vintage amp videos like this one, please subscribe to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. We would really appreciate it. Thanks for watching :)
Harmony H322 Bass Amp.......The mini Bassman from Hell !! Uncle Doug 2020-04-04 | This video chronicles the nightmarish repair of a thoroughly botched early 1960's Harmony Model H322 Bass Amp, probably built by Lectrolab. Since it features powerful (7591) fixed-bias output tubes and four (8-inch) speakers, it resembles a "mini" Fender Bassman, but was plagued by yards of tangled added cables, ill-conceived modifications, muddy sound, low volume, and a roaring 60Hz hum. Fixing it was one of the greatest challenges I have faced, and actually required a few months "vacation" from the task to avoid either insanity or retaliation with an axe (not the guitar type) :) Extra features include the opening of a very special gift from a generous viewer, visits from Jack and K.C., and a really special modification to one of the hot rods. Here is the link to the video discussing the special gift: youtu.be/Q7NNVe753doWARNING: All filter capacitors MUST be fully discharged before working on any circuit. Use only one hand when working on a live circuit. Although I point with a finger from time to time in videos, it is best to always use an insulated pointer, like a chopstick. Please be careful :)If you enjoy advertising-free videos like this one, please subscribe to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal donation to: dldcam@aol.com. Thanks !!!
1964 Fender Blonde Bandmaster: The Noisy Amp That Couldnt Be Fixed Uncle Doug 2020-03-27 | This video documents the repair of a beautiful 1964 Fender Blonde Bandmaster that has been giving the owner continuous problems despite numerous professional repair attempts. This provided an excellent opportunity to demonstrate the use of an oscilloscope, as well as common sense, to track down the source of noise originating within an amp circuit. Also, we will see a simple but accurate way to adjust voltages within a pre-amp circuit. To break up the monotony, I have included several special features that will thrill and amaze.If you enjoy advertising-free videos like this one, please consider becoming a Patreon patron of our channel at: patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. We really appreciate your continued interest and support.
1961 Blonde Fender 6G6 Bassman.....The Garage Sale Special !! Uncle Doug 2020-03-06 | Recently, a viewer found a rare and wonderful, tube-rectified, 1961 Fender 6G6 Blonde Bassman chassis and circuit (no cabinet) at a garage sale for a pittance....and sent it to me for a complete overhaul. After residing in an attic for god-knows how long, it fought me to the death before finally surrendering and working beautifully. Watch as it evolves from wretched chassis to complete, functional amp. In addition, the circuit was converted from 6G6 to 6G6B form, to improve the Bass and Treble controls and overall tone. EXTRAS: Jack & Ollie are in good form for an audio demo concert, we open a really nice gift box, we visit Jack in his secret lair, and finally we tour then take a ride in the nastiest 1959 Nash Rambler you will ever see. See warning at the bottom ;)If you enjoy advertising-free videos like these, please subscribe to our channel and consider becoming a Patreon patron at patreon.com/uncledougsvintageamps or making a PayPal contribution to: dldcam@aol.com. Thanks so much for watching.WARNING: If you have an aversion to excessive displays of horsepower and acceleration, considering them to be reckless, childish, and totally unacceptable in civilized society..... then please don't watch the final 6 minutes of this video.
J Geils 1958 Gibson ga55V Amp Cabinet.....The Termites Revenge Uncle Doug 2020-02-25 | A viewer in California bought a Gibson ga55V amp from an auction of the estate of J. Geils. When the amp arrived, the amplifier itself worked well, but the cabinet had apparently suffered severe termite damage during storage. At the owner's request, I undertook a restoration of the damaged wood parts, without undoing any of the original signs of age and normal use. It was quite a challenge, and I hope you (and the owner) will be pleased with the outcome.In addition, with KC's help, I will open all the parts to build a Heathkit HiFi amp, which was sent by a generous viewer. Finally, I will show you a recent hot rod update in which the rusty body of the 1930 Ford coupe is coated with a satin UV-resistant urethane finish to protect and preserve it. If you enjoy advertising-free videos like this, then please subscribe to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to our account: dldcam@aol.com. Thanks so much !!!Here are links to two articles on manifold vs ported vacuum advance: chevellestuff.net/tech/articles/vacuum/port_or_manifold.htmhttp://www.hotrod.com/articles/everything-you-wanted-to-know-about-vacuum-advance-and-ignition-timing
The Nightmare on YouTube Street: Repairing a 1950s Stewart Amp Uncle Doug 2020-02-15 | In this unusual video, I feature both the restoration of an early Stewart brand amplifier and the trials & tribulations of amp repair in general. Despite all my best efforts, I cannot make the original circuit sound good.....so I have to resort to extraordinary measures. Hopefully, the audio test at the end will verify the success of my efforts. Our second feature will be Part 2 of the 3 x 2 Carb Modification to the 1930 Ford Coupe and will include a felonious test drive guaranteed to warm the cockles of your heart.....whatever the heck that means :)NOTES: 1.) I did not replace the blown speakers because the owner of the amp already has a nice pair of replacement speakers which he will install once the amp is returned. 2.) For those concerned about the placement of the vacuum advance line, please read the following: chevellestuff.net/tech/articles/vacuum/port_or_manifold.htmIf you enjoy advertising-free videos like this one, please subscribe to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps or making a PayPal contribution to our account: dldcam@aol.com. Also, for subscribers, be sure to click on the bell at the top right of the screen to request notification of all newly posted videos. Thanks so much for watching :)
Marshall 1986 JMP-50 Bass Amp becomes a Model 1987 Lead Amp.....with Extra Mustard Uncle Doug 2020-01-28 | In this video, what started out as the fairly straightforward re-capping of a tube-rectified late-60's Marshall JMP 50 amp with an NOS set of original "mustard" caps, turned into a real adventure when it was discovered that the circuit was not the Model 1987 Lead amp the owner thought he owned, but instead was a Model 1986 Bass amp. For reasons that are discussed in the video (at 10:26), it was decided to (reversibly) modify the circuit into the 1987 configuration by installing the set of 1987 "mustard" caps, and then compare the tone, before and after the conversion. The video explains the rationale behind the conversion, shows a step-by-step (with schematics) explanation of each cap installed (at 12:25), and offers a direct side-by-side audio comparison of the 1986 and 1987 circuits (at 24:48). In addition, there is a second feature video showing another conversion, in this case involving a chopped and channeled 1930 Ford coupe and three Stromberg 97 carburetors (at 37:14). If you enjoy advertising-free videos like this one, please subscribe to our channel and consider becoming a Patreon patron at: patreon.com/uncledougsvintageamps, or making a PayPal contribution to: dldcam@aol.com. Thanks so much :)
