Understanding Vacuum Tube Amplifier Schematics - Grounding - Part 6 Blueglow Electronics 2026-09-20 | Understanding Vacuum Tube Amplifier Schematics - Grounding - Part 6
Blueglows Listening Room - Sneak Peak Blueglow Electronics 2024-04-27 | Just a little teaser video showing our listening room down in the audio barn that we spent 4 years restoring. Much more to come on this room and the gear in it but tell us down below what you want to learn about the most...
Heathkit (Altec) Legato Speakers - Asking for Viewer Help! Blueglow Electronics 2024-04-19 | To all my loyal viewers, I could use your help with a woodworking conundrum that I have ran into in trying to restore these old Heathkit Legato Speakers from 1958. Please watch and see if you could provide any guidance.Legato Specs- 16 ohm- Mahogany or blonde finish-rated to 50 watts- 25 to 20,000 cps- 41" x 22 3/4" x 34"- 195 lbs each- (2) 15" Altec LF Drivers #401-17 which are Heathkit branded 803A's- Altec HF Driver #401-18 which is Heathkit branded 802D- Horn is #400-1 Heathkit Branded Altec 511- Network is Heathkit
How to Build a Lift / Hoist / Elevator for your Shop, Building, or Garage Blueglow Electronics 2024-04-17 | We built a 1000+ pound lift for our 2-story barn. Very functional and makes moving heavy items up and downstairs a breeze. An in-depth walk through of how I made mine for our Audio Barn.Parts I used:20' Unistrut / 1-5/8 in x 1-5/8 inzoro.com/superstrut-superstrut-channel-1-58-w-20-ft-l-gold-a1200hs-20/i/G2939483/?q=G2939483But I might recommend looking locally at Tractor Supply, Lowes, Home Depot, etc. to avoid the shipping cost.Global Industrial Flat Utility Cartamzn.to/3Uj7HUuUnistrut Roller Wheelsamzn.to/3xFAJokUnistrut Hanger Bracketamzn.to/3xEE6Ml16 AWG 4 Conductor Cord 25ftamzn.to/4cWQzuRElectric Hoist 110v 1320lbs w/ cabled remoteamzn.to/4cWQffDElectric Hoist 110v 1320lbs w/ Remote Controlamzn.to/3xBGB22
Blueglow Electronics Update - Spring 2024 Blueglow Electronics 2024-04-16 | A short video about what has been going on in my personal life, an update on the audio barn, and a little about the future.
Gochifix LG304 3-in-1 Multimeter / Oscilloscope / Waveform Generator Review - Updated Blueglow Electronics 2024-04-15 | A fun little video showing a device I am planning to use on the bench as I do restorations and make videos.Buy it here via this link please if you decide to get one:amzn.to/43Yy59m25% off code: 25BlueglowLink to reference device: dmmcheckplus.com#Gochifix#Oscilloscope#multimeter
RARSFEST 2024 - Raleigh NC Hamfest Load-In Day Walk-Thru Blueglow Electronics 2024-04-08 | Video made during Friday load-in and Day 1 of the Charlotte Hamfest. We had a lot of fun and talked to some great people throughout the day. Got to spend some time with Dennis / Denny Had W4USR - Founder Cary Audio.Hope you enjoy!
2024 Charlotte Hamfest Walk-Thru Day 1 Blueglow Electronics 2024-03-15 | Video made during Friday load-in and Day 1 of the Charlotte Hamfest. We had a lot of fun and talked to some great people throughout the day. Hope you enjoy!MarkKG4FDR
How To Replace Aeroflex IFR Front Panel Overlay and Buttons for FM/AM-1600S IFR-1600 TS-4317 Blueglow Electronics 2023-12-22 | Seller on ebay has replacement front panel overlays and buttons for the IFR 1600 / 1600S / TS-4317 Series of Service Monitors. Both can be purchased for around $60 USD. Replacing your worn discolored buttons and face plates can significantly increase the value of your unit and just make it look better in general. I had to replace mine because one button wasn't functional when I received my unit.A link to a video I made on how to properly ship items like this:youtu.be/i4OuwVF5Bp0?si=0ghjSY3DZTgbYCZgEbay links:ebay.com/itm/272918590190ebay.com/itm/232555062809Link to cart I mentioned in the video:amzn.to/3NCPOfy
A 40 Amp Linear Power Supply Rebuild Journey - Tripp Lite PR-40A Blueglow Electronics 2023-12-20 | Hopefully an educational video about rebuilding a high current linear power supply and doing some electronic sleuthing since there was no schematic to be found for one of these. Learning a little about current sensing / protection circuits and crowbar circuits.Link to the heatsink grease I used in this video:amzn.to/47jFvnV
How To Remove Smoke Smell From Electronics : Stereo, Ham Radio, CB, Test Equipment, You Name It... Blueglow Electronics 2023-11-29 | Short little video on how to effectively remove the smell of smoke from any electronics device. Ham Radio, CB, Turn Table, Vintage Stereo, Tube Amplifier, Multimeter, Car Stereo, you name it. Not kinda, really gone!Watch and see.This is what I used:amzn.to/3uAsRTv
How to replace the fan in your mobile Ham Radio, CB, test gear, or many other things Blueglow Electronics 2023-11-14 | A short video on how to go about selecting a replacement fan and installing it into any ham radio, CB, other mobile radio, test equipment, you name it...Hope you enjoy.MarkA link to my favorite brand:https://noctua.at/en/products/fan
One of the Most Overlooked Steps in Vintage Electronics Restorations & How to Do It So Simply... Blueglow Electronics 2023-11-06 | A quick little video on a critical step that is often skipped or overlooked when restoring vintage solid-state electronics. Examples of why you should do this, and steps required to do it successfully. Link to the product I used in this video:amzn.to/47jFvnV
Sencore PR570 - Upgrade & A Variac Tip Everyone Should See Blueglow Electronics 2023-11-03 | Made a short video showing how I drilled a chassis hole using a greenlee chassis punch and then soldering up a rear external jack. Also, a variac tip that everyone should see.Link to the round outlets I used. amzn.to/40nfLoA
KT88 Single Ended Tube Amplifier Build 2018 - Part 13 - 2023 Update Blueglow Electronics 2023-10-31 | An update to the BOM to solve for some components that have became impossible to find. Hope you enjoy.Mark
Sencore PR-57 Powerite Variac Repair, Calibration, and Upgrade Blueglow Electronics 2023-10-16 | Thought I'd put this neat little unit to work on my bench but it took some work to get it functional and accurate. Added a little upgrade to bring it into the current decade of technology. Hope you enjoy :-)Link to the round outlets I used. amzn.to/40nfLoALink to the power meter I used.ebay.com/itm/134694231802
Clingman NC 2023 Fall - CB / Hamfest Blueglow Electronics 2023-09-19 | Went to a little hamfest about 15 minutes from my house this past weekend. I thought those that couldn't make it might enjoy a video of the show. This show is 1/2 CB-fest 1/2 hamfest, a lot of good people and gear showed up.
Shelby NC 2023 Hamfest 3 Day Walking Tour - by Blueglow / KG4FDR Blueglow Electronics 2023-09-02 | Spent 3 days walking around the hamfest (Wed-Friday) and made videos of the majority of the stuff we saw. It was a great hamfest, although down in attendance a bit from last year. Each year seems to be this way, sadly. Hope you enjoy.Don't forget to check out the Rock Hill SC hamfest Oct 7th, the Asheville NC Radio Museum Show Sept 9th, and the Clingman NC hamfest Sept 16th, all coming up. After that, not much coming up until Charlotte in the spring.73,MarkKG4FDR
Hafler DH-110 Preamp - Fixing the Most Common Issue - 2023 Blueglow Electronics 2023-07-23 | Fixing the dreaded muting circuit issue in the Hafler DH110 preamp. Simple fix that anyone can do in less than an hour.Source of parts I used:J112 FETmouser.com/ProductDetail/512-J112LM393 Comparatormouser.com/ProductDetail/595-LM393P8 Pin Socketmouser.com/ProductDetail/575-110413084100103 Pin Socket if you wanted to addmouser.com/ProductDetail/575-93103
How I built my Electronics Workbench using 2x4 Basics Kit - 2023 Blueglow Electronics 2023-07-22 | Built a new electronics workbench in the barn in 2023 using the 2x4 Basics Kits. Hope you enjoy, I share what I built and some tips in how to go about building it.Hope everyone is doing well, slowing getting our audio barn where we want it for retirement.
2023 Charlotte Hamfest - Friday Walkthrough Blueglow Electronics 2023-03-11 | This is a walkthrough of the Charlotte 2023 Hamfest on Friday while all of the flea market vendors were setting up and unloading. Should give you a good sense of what all items showed up for sale at the hamfest.
Tube Amplifier Blowing Fuses - Troubleshooting Tips Blueglow Electronics 2023-02-26 | BG320 - Troubleshooting of a tube amplifier that is blowing fuses. In this case it was a viewer that built the SE KT88 and flipped the UL switch while the unit was in use. I'm still super busy with my day job but hope to start fitting in a few shorter videos like this along the way. I miss making them as much as you guys do watching them. Stay tuned...
Shelby Hamfest 2022 - Walking Tour Blueglow Electronics 2022-09-05 | Spent a few days at the Shelby NC Hamfest. I made this video Saturday morning early while walking around. There was a lot of good gear at the show as well as a lot of good people to rag chew with. Hope to see you there next year.MarkKG4FDR
Happy Holidays 2021 From Blueglow Electronics Blueglow Electronics 2021-12-24 | Short video wishing you a happy holidays and a few updates, tech tips, etc.
Shelby Hamfest 2021 - Part 2 - Audio Picker Finds Blueglow Electronics 2021-09-05 | Video showing some of the picks I made throughout the 4 days I was at the 2021 Shelby NC Hamfest. Some really good finds I am proud to have picked up. If you are interested in seeing what all we picked up, watch this one. If you want to tour the hamfest and see what was out and about, watch part 1.
Shelby NC Hamfest 2021 - Part 1 - Saturday Walking Tour Blueglow Electronics 2021-09-05 | Walking around the 2021 Shelby NC Hamfest looking at various equipment and gear on tables.
A Message To Caig - Please Fix Your DeoxIT D5 Spray Nozzle Blueglow Electronics 2021-07-17 | A video that I made out of frustration to show how the new spray nozzle setup that Caig shifted two a year or so back performs. Its just horrible in all senses. Leaks at the cap, at the hose joint, hose isn't flexible, and so on. Please revert back!
Hafler DH-110 Preamp Restoration Blueglow Electronics 2021-07-17 | BG310 - Restoration of a Hafler DH 110 preamplifier. Super nice unit that is paired up with the DH-220 amplifier that I restored in another video set.
Hafler DH 220 Restoration - Part 2 Blueglow Electronics 2021-07-17 | BG309 - Part two in our two part series on restoring a Hafler DH-220 solid state amplifier. In this video we recap the unit, replace the driver boards with upgraded components, and bench test the unit.
Hafler DH 220 Restoration - Part 1 Blueglow Electronics 2021-07-17 | BG308 - Part one in our two part series on restoring a Hafler DH-220 solid state amplifier. These were all the rage when I was a child but I couldn't afford one back then. Picked this one up a while back and decided its what I wanted to use to drive some speakers in my barn shop area. Sadly it died a week into use so it was time for a restoration. In part 1 we select a path and parts to move forward with the restoration.Parts were obtained on ebay from this seller.ebay.com/str/quacoaudio?_trksid=p2047675.l2563
Blueglow Electronics - Summer 2021 Update Blueglow Electronics 2021-06-14 | Just a little update on what we have going on here at Blueglow Electronics.
Mystery Cary CAD-805 Amplifier Pair - Repair & Testing - Prototypes? Blueglow Electronics 2021-04-09 | BG306 - Quite the mystery and journey these amps have gone on. Even some insight from Dennis Had, founder of Cary Audio. We had fun fixing a high voltage issue on these amplifiers and bench testing them. They are quite impressive.
SBS Several Tech Tips - Portable O-Scope - Backyard Hamfest - Mark Gets Interviewed Blueglow Electronics 2021-03-28 | BG305 - Fun little soap box sunday video. Links:SRT Amplification Interview with Markyoutube.com/watch?v=TAUBMU_HpwQNT Cutter Pro:amazon.com/NT-Cutter-Auto-Lock-Stainless-Utility/dp/B005J0XDSW/ref=sr_1_2?dchild=1&keywords=nt+cutter+pro&qid=1616937339&sr=8-2Check & X Stampsamazon.com/gp/product/B07HBRPNXM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1amazon.com/gp/product/B07D6G3P6M/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1Link to some of the printouts I showed laminated on my website:blueglowelectronics.wordpress.com/diagramsLink to Blueglow.club:https://blueglow.club/
SBS - Show n Tell - Speaker Efficiency - MojoTone Chassis Stand Mods - More Blueglow Electronics 2021-03-06 | BG304 - Soap Box Sunday - Fun little video showing a few tips and telling some stories. Crazy crossover story, speaker efficiency, bluglow.club update, virtual show & tell, and some mods to improve your MojoTone chassis stand
Announcing our own Blueglow Community Forum Blueglow Electronics 2021-02-24 | Short video explaining about our new www.blueglow.club community forum and why we decided to create our own.
Oscilloscopes For Audio 101 -Part 4B - Push Pull Amplifier Troubleshooting Blueglow Electronics 2021-02-23 | BG303 - More live on the audio bench troubleshooting of a push pull EL84 / 6BQ5 amplifier. This one was a little tricky as you will see. We learn some oscilloscope skills as well as how to use a schematic and digital multimeter to solve problems.
Oscilloscopes For Audio 101 - Part 4A Single Ended Tube Amplifier Troubleshooting Blueglow Electronics 2021-02-18 | Using just a Tektronix 2246 Oscilloscope to troubleshoot a problem with a DG SE1 Single Ended EL84 / 6BQ5 Amplifier (upgraded magnavox console amplifier).
SBS - 300B SET Amp Build Update - Tech Tip on Tube Characteristics - More Blueglow Electronics 2021-02-14 | We celebrate our 300th video and look at some of our lifetime viewer stats. Opening some viewer mail. Oscilloscope series update. Big update on our 300B Single Ended Triode Amplifier Build. And a very cool Tech Tip on tube characteristics and relationships. Had a lot of fun making this one!Links: Tube Characteristics Cheat Sheetblueglowelectronics.wordpress.com/diagramsInside the Vacuum Tube Book PDF worldradiohistory.com/BOOKSHELF-ARH/Rider-Books/Inside-the-Vacuum-Tube-Rider-1945.pdf?fbclid=IwAR3-ZotQoEbvTxAesrRbil4_O0xU80sWnIQyfazE8J145L87L02uqdjj4Ak
Oscilloscopes For Audio 101 - Part 3 - Oscilloscope Basics - How to Use One Blueglow Electronics 2021-02-06 | BG300 - Part 3 in our series on oscilloscopes for audio usage. This one focused on the basics of an oscilloscope. Vertical, horizontal functions, triggering, measurements, analog & digital scopes, etc.
SBS - Blueglow Chassis - eBay debacle - Cathode Bias - Amp Bench Stand Blueglow Electronics 2021-01-24 | BG299 - Fun little video covering a variety of topics.
Oscilloscopes For Audio 101 - Part 2 - Safety and Precautions Blueglow Electronics 2021-01-17 | BG298 - This video is full of practical knowledge about working with oscilloscopes on the bench safely. We show both analog and digital scopes in use and how to use differential scope probes in high voltage cases.Link to Dave @ EEVblog's video on Oscilloscope safety:youtube.com/watch?v=xaELqAo4kkQLink to Micsig DP10013 High Voltage Differential Probeamazon.com/Micsig-DP10013-Differential-Attenuation-Tektronix/dp/B074K4XPW3/ref=sr_1_2?crid=3PYE7F5BPHZEF&dchild=1&keywords=micsig+dp10013+high+voltage+differential+probe&qid=1610896515&sprefix=micsig+%2Caps%2C174&sr=8-2
SBS - What is instore for 2021 at Blueglow Blueglow Electronics 2021-01-03 | Thought I'd talk about our plans for 2021.
Buying an Oscilloscope and Accessories For Audio Bench Work and Testing Blueglow Electronics 2020-12-28 | BG295 - Part 1 in our new 5 part series on using Oscilloscopes for Audio Bench Work. This is a practical usage focused series for the average DIY'er that wants to get into doing some audio bench work, restoration, and repair of vintage or new gear. We also cover analog vs. digital scopes and why you might want one over the other for audio work. We cover many accessories that would make doing audio work with an oscilloscope both practical and safe.The following Episodes will follow in coming weeks:Part 2 – Oscilloscope Safety Basics & Working With ProbesPart 3 – Basic Oscilloscope UsagePart 4 – Real Life Use Cases On The BenchPart 5 – Advanced – Analyzing Audio Signals Using An O-Scope (Distortion, Frequency Response, Power Output, etc.)Links mentioned in the video:EEVblog #601 – Why Digital Oscilloscopes Appear Noisyyoutube.com/watch?app=desktop&v=Znwp0pK8TzkRCA (Mono) to 3.5mm (Stereo) Adapteramazon.com/Monoprice-107241-Stereo-Adaptor-Plated/dp/B001T1ZZPY/ref=sr_1_1?dchild=1&keywords=107241+rca&qid=1608808210&sr=8-1Parts Express 8 Ohm 100W Non-Inductive Dummy Load Resistor (Need 2)amazon.com/Parts-Express-Non-Inductive-Dummy-Resistor/dp/B0002KRDGC/ref=sr_1_3?dchild=1&keywords=parts+express+8+ohm&qid=1608808272&sr=8-3Jameco GRP-1200 Isolation Transformeramazon.com/Valuepro-GRP-1200-Transformer-Isolation-Benchtop/dp/B00R5CDG8O/ref=sr_1_1?dchild=1&keywords=jameco+grp-1200&qid=1608808325&sr=8-1RCA Female to BNC Maleamazon.com/RuiLing-Female-Adapters-Coaxial-Connector/dp/B00VUG00FI/ref=sr_1_1?crid=1NXF99DE5HQ0Q&dchild=1&keywords=ruiling+10+pack+rca+female+plug+to+bnc+male+jack&qid=1608808367&sprefix=ruiling+10+p%2Caps%2C168&sr=8-1Syncwire RCA Cable, [10FT/3M] Nylon Braided 3.5mm to 2-Male RCAamazon.com/Syncwire-Shielded-Gold-Plated-Connector-Smartphones/dp/B086YBCZCT/ref=sr_1_3?dchild=1&keywords=syncwire%2B3.5mm%2Bnylon%2Bbraided%2Brca&qid=1608808445&sr=8-3&th=1Universal 100mhz Oscilloscope Probe Kitamazon.com/Universal-Oscilloscope-Accessories-100MHz-Minigrabber/dp/B0827JL1T2/ref=sr_1_4?dchild=1&keywords=oscilloscope+probe+kit&qid=1608808532&sr=8-4
SBS Hayseed Hamfest Update - Oscilloscope Videos - Amp Building Classes Blueglow Electronics 2020-12-13 | Just a few random topics along with an update on the Hayseed Hamfest Capacitor video I made a few weeks ago. Showing some of our thoughts on future topics like Oscilloscope training videos and amp building classes.
SBS - Oscilloscope Videos? - 300B Amplifier Update - Tech Tip - Ads - Driver Tube Blueglow Electronics 2020-12-05 | Just a few random topics and a few questions for my viewers.Frequency Response of Amplifiers Article Link:circuitcellar.com/wp-content/uploads/2012/04/Honeycutt-AXapril2012.pdf
Six Common Mistakes Made When Recapping Vintage Electronics Blueglow Electronics 2020-11-29 | Short little video on common mistakes seen when recapping (replacing capacitors) vintage electronics. This would include vintage stereos, radios, equipment, CBs, ham radio receivers & transmitters, calculators, computers, you name it.Hopefully this will provide you some tips and hints to use when you go to recap your piece of vintage gear.Topics include:- Mistaking Factory Glue for Leaking Capacitors- Factory Boards and Manuals Marked Wrong- Capacitors Installed Incorrectly- Using Larger Capacitors Than Specified- Buying Electrolytic Capacitors off Ebay- Replacing Everything at Once
diyAudio Passworks Korg NuTube Preamp Kit Build Tips & Hints Blueglow Electronics 2020-11-28 | BG291 - My build of the diyAudio Korg NuTube Preamp kit designed by Nelson Pass. Fun little DIY build project I did over Thanksgiving 2020. This was a fun build and actually sounds really good. For a modern day low voltage vacuum tube, I'm impressed. Hope you enjoy.Few links below:Link to where I got in on the preorder, sold out for now but should have more soon:diyaudiostore.com/products/korg-nutube-b1?variant=29449217802274Link to the diyAudio thread on the preamp:diyaudio.com/forums/pass-labs/313612-b1-korg-triode.htmlLink to Build Guide by 6L6:guides.diyaudio.com/Guide/B1+with+Korg+Nutube/12
SBS ClassicTone Closing - Hayseed Hamfest - Western Electric Solder - Room Acoustics - and More Blueglow Electronics 2020-11-08 | Updated version to fix the 1st few minutes of no audio.BG287 - Some interesting topics today: Price of western electric / Nassau pure water white rosin solder, ClassicTone / Magnetic Components closing, Hayseed Hamfest manufacturing processes?, Delatsch Electronics transformer winding tools, Pearl Acoustics video on room acoustics. Links:Pearl Acoustics Videoyoutube.com/watch?v=Ty4jybJkOzo&t=18sDelatsch Electronics:delatsch.comHayseed Hamfest:hayseedhamfest.com
KT88 6550 KT120 KT150 Tube Interchangeability Blueglow Electronics 2020-11-07 | BG286 - I get the question a lot about swapping out KT88s with KT120s or KT150 tubes in people's amplifiers. The answer isn't so straight forward and thus I wanted to provide some education on the topic.Link to Rob Borinette's site on load line calculationsrobrobinette.com/Drawing_Tube_Load_Lines.htm
Troubleshooting a Single Ended KT88 Tube Amplifier Issue Blueglow Electronics 2020-10-25 | BG284 - One of our fellow viewers built the KT88 amplifier following our Single Ended series from two years ago. However, he was pulling his hair out trying to figure out why it didn't work properly. I offered to help him out. Video shows simple basic troubleshooting steps used in fixing a vacuum tube amp.
How To Clean Vacuum Tube Pins Blueglow Electronics 2020-10-24 | BG285 - Quick Ask Mark video on how to clean radio vacuum tube pins.Can't guarantee the quality of these as I haven't bought these specific ones but they seem to look just like what I am using. When first starting, you will loose a few bristles but after a short use, they stop coming out, or at least mine did. Remember to wear eye protection!!!amazon.com/Dremel-536-02-Brass-Brushes-Pack/dp/B015PK3CHM/ref=sr_1_1?dchild=1&keywords=brass+dremel+brush+1%2F2&qid=1603550252&sr=8-1
