How an Atomic Clock Really Works: Inside the HP 5061A Cesium Clock CuriousMarc 2020-03-20 | I finally get my hands on what I consider a holy instrument: the HP 5061A Cesium clock. We'll turn it on and play with it, of course, but I'll also explain how it works in more details than most videos, both the quantum physics principle and the HP implementation. What makes it tick is just mind blowing. See continuation in part 2 here: youtu.be/xTy1kY_wtsYCody's Lab Cesium video: youtu.be/rSJGwnERIVUOur sponsor for PCBs: pcbway.comSupport the team on Patreon: patreon.com/curiousmarcBuy shirts on Teespring: teespring.com/stores/curiousmarcs-storeLearn more on companion site: curiousmarc.comContact info: youtube.com/curiousmarc/aboutMusic Credits:Crinoline Dreams by Kevin MacLeod (www.incompetech.com)Scott Joplin's Nonpareil Rag by Scott Kirby (http://scottkirby.net)
HP 5245L Repair-a-thon - Part 3: 500MHz Plugin Repair (HP 5253A and HP 5253B) CuriousMarc 2023-06-12 | It's time to repair our 500 MHz frequency converter plugins, the HP 5253A and HP 5253B. It says in red letters: "CAUTION: DO NOT ATTEMPT DISASSEMBLY OF CAVITY". Really? Guess what we are going to do! What we find inside is quite amazing. Through RF magic tricks, they make our HP 5245L Nixie counter work 10 times faster!5245L Repair-a-thon Playlist: youtube.com/playlist?list=PL-_93BVApb5_MQBUOVLgdKCaUPY1zaPh_Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
We found the shark in the SHARC DSP #Short #InTheRightOrientation CuriousMarc 2023-06-08 | Antoine (@SiliconInsid on Twitter) brought some cool chips to decap. Here we open a quad SHARC DSP chip. We think that's where the original recipe for fish and chips comes from!Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Apollo Comms Part 28: Apollo AC power inverter and the great Apollo 13 debug CuriousMarc 2023-06-02 | We open up a Block I Apollo AC inverter, delve deep inside the Apollo electrical power system, and follow word for word the Apollo 13 raw audio of the debug after the accident. Apollo 13 incident composite loop is on my website around here:curiousmarc.com/space/apollo-s-band-communications#h.kuc8m1at9uu4An even better way to listen to the Apollo 13 audio is to go to:apolloinrealtime.org/13Select "join at launch-1minute", then pause it and go to mission time 55:54.To get an even better listen to the debug, go to the Mission Audio Control tab, and click on EECOM. You'll hear even more of the backroom discussion between EECOM and EPSThe episode about the fuel cell is here:youtu.be/5ZBRw07IbgoLinks to doc:curiousmarc.com/space/apollo-s-band-communicationsvirtualagc.github.io/virtualagc/QuestForInfo.htmlibiblio.org/apolloMusic Credit: Crinoline Dreams by Kevin MacLeodOur sponsors- PCBWay: fast turn PCBs, pcbway.com- ElectroRent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy shirts on Teespring: teespring.com/stores/curiousmarcs-storeLearn more on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
RAF Pitot Static Tester Preview - Guess What This is For! #Short #InTheRightOrientation CuriousMarc 2023-05-30 | A quick preview of a mystery instrument I just repaired. Can you guess what what it does? Hint: my minions stole this from the British RAF. Full repair video will follow, that was intense.Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
HP 5245L Repair-a-thon - Part 2: Repairing the king of Nixie frequency meters CuriousMarc 2023-05-17 | We continue repairing our very broken HP 5245L, and hit some really subtle bugs in this amazing all-transistor machine. Opening the Nixie decoder to reveal its many neons and photo-resistor tree is a special treat. 5245L Repair-a-thon Playlist: youtube.com/playlist?list=PL-_93BVApb5_MQBUOVLgdKCaUPY1zaPh_Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
HP 5245L Repair-a-thon - Part 1: The King of 1960s Frequency Meters CuriousMarc 2023-05-11 | We start repairing our very broken HP 5245L. It is arguably the king of the Nixie frequency meters of the 1960s. Equipped with the right plug in, it could count up to 18 GHz. Many of them were used in the Apollo communication ground stations. But this digital instrument does not use a single IC: it's all made with individual transistors inside! It feels like repairing a giant IC, but with access to every transistor. We're sure not complaining about it.5245L Repair-a-thon Playlist: youtube.com/playlist?list=PL-_93BVApb5_MQBUOVLgdKCaUPY1zaPh_Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Vintage Kollsman Altimeter Repair CuriousMarc 2023-05-07 | Our eBay altimeter that we purchased for the Bendix Air Data Computer restoration is very broken. Can we repair it? Not too sure about that, but at least we'll get to see what's inside, and it's very pretty!Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Star Wars Aware Computer - from 1964 CuriousMarc 2023-05-04 | Today is May the 4th! May the force stay strong with your vintage computer!Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Apollo Comms Part 27: Quindar Tones Microphone Hack CuriousMarc 2023-04-29 | Nothing is more emblematic of the Apollo communications than the Quindar tones, which you hear at the beginning and end of each transmission. In this episode, we hack a cheap commercial microphone to bring it up to NASA standards by adding the tones. After explaining what they do, of course.Apollo Comms Playlist: youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGbProject notes and schematics: curiousmarc.com/space/quindar-tone-generatorLinks to doc:curiousmarc.com/space/apollo-s-band-communicationsvirtualagc.github.io/virtualagc/QuestForInfo.htmlibiblio.org/apolloMusic Credit: Crinoline Dreams by Kevin MacLeodOur sponsors- PCBWay: fast turn PCBs, pcbway.com- ElectroRent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy shirts on Teespring: teespring.com/stores/curiousmarcs-storeLearn more on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Bendix Air Data Computer - Part 3: Intro to Synchros CuriousMarc 2023-04-25 | We delve into synchros, a magical angular sensor and actuator that predates electronics, is prevalent in our electro-mechanical computer, and is still used to this day.Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Bendix Air Data Computer - Part 2: Master Ken Explains (re-upload) CuriousMarc 2023-04-23 | Master Ken explains the amazing jet fighter analog computer made out of gears, that we opened up in this episode: youtu.be/D-wHIDnnQwQKen's in-depth blog article: http://www.righto.com/2023/02/bendix-central-air-data-computer-cadc.htmlPlenty of aerospace videos, including the ones about a later version of this computer on the "Le labo de Michel" channel:youtu.be/buoNSv689r8Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
8 inch floppy drive #3, 4 and 5 repair (CDC 9406 diskette drives) CuriousMarc 2023-04-21 | We repair more 8" diskette drive units with new and entertaining failure modes, including an interesting one involving one of the heads.Depstech DS 520 endoscope: amazon.com/dp/B0BL7LYR9YPrevious 8" floppy videos:youtu.be/oL0LXSE1jeMyoutu.be/WkzPvTQSIgMStuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Apollo Comms Part 26: Full system integration, and our first exhibit CuriousMarc 2023-04-17 | We hook it up all together, and exhibit at DesignCon 2023. Many thanks to Samtec for their support: samtec.com .Apollo Comms Playlist: youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGbLinks to doc:curiousmarc.com/space/apollo-s-band-communicationsvirtualagc.github.io/virtualagc/QuestForInfo.htmlibiblio.org/apolloMusic Credit: Swipesy Cake Walk by Scott Joplin, played by Scott Kirby scottkirby.netOur sponsors- PCBWay: fast turn PCBs, pcbway.com- ElectroRent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy shirts on Teespring: teespring.com/stores/curiousmarcs-storeLearn more on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
8 inch floppy drive #2 repair (CDC 9406 diskette drive) CuriousMarc 2023-04-13 | We repair another 8" diskette drive unit with a weird signal problem, using the PC setup we managed to work out in our previous video.Previous 8" floppy videos:youtu.be/oL0LXSE1jeMyoutu.be/WkzPvTQSIgMStuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Retr0brighting the easy way (Protek 3015B power supply) CuriousMarc 2023-04-11 | We try our hand at retr0brighting a very yellowed Protek power supply, with a simplified method.Amazon link for Salon Care 40 Clear Developper: amazon.com/40-Clear-Developer-32-oz/dp/B004OKA0EI/ref=sr_1_3?crid=31SWZDEM6CVLZ&keywords=salon+care+40&qid=1681212571&sprefix=Salon+car%2Caps%2C160&sr=8-3My page of Amazon links for the lab tools and products I use: curiousmarc.com/amazon-linksStuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Soyuz Globus Mechanical Navigation Computer Part 3: Landing Function CuriousMarc 2023-03-26 | We finish the restoration of our Soyuz INK "Globus" analog mechanical navigation computer by making its all important landing point prediction function work again. Part 1 video: youtu.be/dmHaCQ8Ul6EPart 2 video: youtu.be/CP5dfjxdkQ4Ken's blog article on reverse engineering the Globus gears: http://www.righto.com/2023/03/reverse-engineering-globus-ink-soviet.htmlKen's blog article on the Globus functions:http://www.righto.com/2023/01/inside-globus-ink-mechanical-navigation.htmlMusic credits: Tetris original game music, played on my Mac SE: drive.google.com/open?id=1kVaCzpzfUrowlL_N8gEM456UP8hwO2Z1Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- Depstech endoscopes: depstech.com- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
More about 8 floppies: recovering data from odd diskette formats I didnt even know existed! CuriousMarc 2023-03-23 | We complete our early floppy diskette education by taking a look at a hard sectored 8" floppy, an IBM Minnow floppy, an IBM Demi Floppy, and some oddly formatted Intel Intellec diskettes. Will we be able to recover the data?Our previous video on 8" floppies: youtu.be/oL0LXSE1jeMRecovered IBM 370/135 IPL Minnow Diskette data: github.com/schlae/minnow-diskApplesauce Floppy Controller: applesaucefdc.comStuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Apollo Comms Part 25: Central Timing Equipment CuriousMarc 2023-03-11 | We power up Apollo's capsule Central Timing Equipment and make a space Nixie tube space clock while we are at it. Apollo Comms Playlist: youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGbLinks to doc:curiousmarc.com/space/apollo-s-band-communicationsvirtualagc.github.io/virtualagc/QuestForInfo.htmlibiblio.org/apolloOur sponsors- PCBWay: fast turn PCBs, pcbway.com- ElectroRent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy shirts on Teespring: teespring.com/stores/curiousmarcs-storeLearn more on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
7 Orbits with the Soyuz Globus Mechanical Computer #Short #InTheRightOrientation CuriousMarc 2023-02-28 | We fly 7 orbits with the amazing Globus analog mechanical navigation computer, from the Soyuz spacecraft. Full episode Part I: youtu.be/dmHaCQ8Ul6EFull episode Part II: youtu.be/CP5dfjxdkQ4Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
7 Orbits with the Soyuz Globus Mechanical Computer #Short #InTheWrongOrientation CuriousMarc 2023-02-28 | See full video and explanation on @CuriousMarc
Soyuz Globus Mechanical Navigation Computer Part 2: Powering Up CuriousMarc 2023-02-28 | We attempt to power up our repaired Soyuz INK "Globus" analog mechanical navigation computer, after 48 years. Part 1 video: youtu.be/dmHaCQ8Ul6EKen's blog article on the Globus: http://www.righto.com/2023/01/inside-globus-ink-mechanical-navigation.htmlOriginal Tetris game song played on my Mac SE: drive.google.com/open?id=1kVaCzpzfUrowlL_N8gEM456UP8hwO2Z1Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- Depstech endoscopes: depstech.com- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
A few orbits with the Soyuz Globus #Short #InTheRightOrientation CuriousMarc 2023-02-18 | Our Soyuz Globus INK is spinning! Enjoy a few orbits, departing from Kazakstan. Obviously slightly overclocked in this video...Link to the Tetris game song played on my Mac SE: drive.google.com/open?id=1kVaCzpzfUrowlL_N8gEM456UP8hwO2Z1Video where the recording is done: youtu.be/GmetgNPL-HQStuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Soyuz Globus Mechanical Navigation Computer Part 1: Grand Opening CuriousMarc 2023-02-16 | We open up a Soyuz INK "Globus" analog mechanical navigation computer. It's full of gears and incredibly gorgeous, and in our case, somewhat broken. Thanks to Depstech for lending us their endoscope!Depstech DS 520 endoscope: amazon.com/dp/B0BL7LYR9YKen's blog article on the Globus: http://www.righto.com/2023/01/inside-globus-ink-mechanical-navigation.htmlOriginal Tetris game song played on my Mac SE: drive.google.com/open?id=1kVaCzpzfUrowlL_N8gEM456UP8hwO2Z1Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- Depstech endoscopes: depstech.com- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Apollo LM Caution Lamp CuriousMarc 2023-02-06 | A viewer recently donated an unusual item to the channel. It looks like a large gray push button. It turns out, it's not a button at all! However, it has an Apollo part number, and of course Mike did track it down. It's a genuine caution lamp from the LM control panel! So we go full @Franlab and light it up.Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Bendix Air Data Computer - Part 1: First Look Inside CuriousMarc 2023-02-03 | We open up an amazing jet fighter analog computer made out of gears.Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcDave Jones opening of a B-52 star tracker analog computer:youtu.be/hzGaO4Kdz2YPlenty of aerospace videos, including the ones about a later version of this computer on the "Le labo de Michel" channel:youtu.be/buoNSv689r8Our lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Apollo Guidance Computer Part 29: Mikes Scores a Coupling Data Unit (CDU) CuriousMarc 2023-01-28 | Mike got a Coupling Data Unit at an auction, opens it up and gives a masterclass in Apollo hardware identification. The CDU is the box that is the root cause of the 1202 errors during the Apollo 11 landing. And his box is not what the auction advertised - it's much better! Apollo Guidance Computer Playlist: youtube.com/playlist?list=PL-_93BVApb59FWrLZfdlisi_x7-Ut_-w7Stuff that supports the channel:- Amazon links for the tools I use in the lab (supports the channel if you buy from there)curiousmarc.com/amazon-links- Channel merch on Teespring: teespring.com/stores/curiousmarcs-store- Support us on Patreon: patreon.com/curiousmarcOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
All you never wanted to know about 8 inch floppy drives CuriousMarc 2023-01-13 | We connect an 8" floppy drive to a PC, learn the 11 ways they are different from standard PC floppies, and even design an adapter and make it available for all on Tindie. Chapters:00:00 Intro01:20 My 8" drives come from an HP 989502:37 The IBM 8" floppy and its media06:03 Antoine's 8" floppy adapter07:06 Booting my PC from the 8" floppy08:24 8" drive restoration and bring up11:08 Making the prototype cable adapter20:16 The 11 quirks of 8" floppies20:52 Single sided vs. double sided21:48 Write protect works reverse22:52 Four address wires!24:56 Head load signal25:41 Door lock signal26:38 Disk ready vs. disk change28:02 Track 43 current control28:37 Pull up resistors29:28 500kHz data rate30:07 FM modulation support30:49 ImageDisk and Omnidisk setup for 77 tracks32:52 Formatting an 8" Floppy34:07 Using the floppy with Windows35:25 Playing Donkey Kong from the 8" disketteAntoine's 8 inch floppy adapter on Tindie: tindie.com/products/siliconinsider/8-floppy-disk-interface-50-pin-to-34-pin-adapterAdrian's Digital Basement video on the 8" floppy: youtu.be/TfEzjcG_0gsStuff that supports the channel:- Support us on Patreon: patreon.com/curiousmarc- Merch on Teespring: teespring.com/stores/curiousmarcs-store- Tools I use in the lab: curiousmarc.com/amazon-linksOur lovely sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comGet more technical info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
CZUR Fancy document scanner review CuriousMarc 2023-01-02 | This is my review of the new CZUR Fancy, a price conscious version of the higher end CZUR Pro scanner that I use and love for my vintage documentation scans. It also doubles up as a livestream cam. CZUR provided the scanner for free, so that counts as a sponsored video. Below is the link with the sponsored description, and also links to some scans I made in the video.3 IN 1, 4k Document Camera-Fancy S Pro, please get it at CZUR's official store: shop.czur.com/products/czur-fancy-proLink to example scans:HP 5061A Cesium Clock Manual Changes: archive.org/details/hp-5061-a-change-manualHP 6267B Power Supply Manual: archive.org/details/hp-6267-b-operation-and-service-manualOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Merry reverse-engineering Christmas! CuriousMarc 2023-01-01 | We unbox our Xmas presents from PCBWay, and Ken still manages to find something to reverse engineer during the holidays!Our sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Mach Number and Static Air Temperature vintage aircraft instruments #Short #InTheRightOrientation CuriousMarc 2022-12-25 | A little teaser. We break the sound barrier and freeze to -100C. Kind of. At least we pretend to. It's a short without being a short, because I refuse to turn my camera the wrong way. Also, the Static Air Temp indicator sounds a bit angry, I wouldn't fly it. These should be used in a future video with our analog mechanical Air Data Computer.Our sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Recovering Jennifers childhood Magnabelt tape on my IBM Executary CuriousMarc 2022-12-20 | Jennifer has a very odd format magnetic tape. She thinks it may have her voice and that of her beloved late father on it, recorded in1965, when she was 4 years old. I know what it is, it's a 4" IBM Magnabelt! It should fit in my ailing IBM Executary 214. Can we recover Jennifer's childhood recording? That would be the hell of a nice Christmas present.Here is the raw recovered sound file: drive.google.com/file/d/11bGtY6hmVwdQlUbCX245M4cNwktJTm1G/view?usp=share_linkViewer Carlos N., a professional sound editor from Portugal, did post processing, removing flutter, hum, noise and other blemishes. Here is the final result:drive.google.com/file/d/1icy3YqlQNlyqa0AeY0wlP_5LzTv1vW52/view?usp=share_linkOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
HP 5327B Nixie Universal Counter / DVM repair CuriousMarc 2022-12-14 | We rescue a Hewlett-Packard 5327B Universal Counter / DVM Nixie beauty.Our sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Military Teletype TE-50B Toolkit Unboxing CuriousMarc 2022-12-11 | I scored an apparently never used US Army toolkit for Teletypes! Weighs in at 31.3 lbs or 14 kg! Let's open it up!Link to the TS-297/U multimeter manual scan seen in this episode: archive.org/details/multimeter-ts-297-u-manual-and-supplementScan of the tools list found in the box: archive.org/details/tool-equipment-te-50-b-signal-corps-us-army-order-no.-36781-ph-52Scan of the tools map found in the box: archive.org/details/te-50-b-content-mapOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Apollo Comms Part 24: Interface Simulator bring up CuriousMarc 2022-12-09 | We bring up one more NASA test equipment box that takes care of all the subcarriers. Apollo Comms Playlist: youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGbLinks to doc:curiousmarc.com/space/apollo-s-band-communicationsvirtualagc.github.io/virtualagc/QuestForInfo.htmlibiblio.org/apolloOur sponsors- PCBWay: fast turn PCBs, pcbway.com- ElectroRent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy shirts on Teespring: teespring.com/stores/curiousmarcs-storeLearn more on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Tektronix PS2521G triple power supply repair and upgrade CuriousMarc 2022-12-03 | My great Tektronix PS2521G is suddenly blowing many of its fuses. We take advantage of the repair to upgrade a few things too.24V 80mm low-er noise fan: digikey.com/en/products/detail/delta-electronics/AFB0824L-F00/9478117Goodie goodie 470uF 35V Rubicon caps: digikey.com/en/products/detail/rubycon/35ZLH470MEFC10X16/3563723Our sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Rejuvenating a color CRT CuriousMarc 2022-12-01 | Our dumpster rescue Sony Trinitron monitor is very tired and all purple. Can we bring it back to life with CRT rejuvenation?Previous video explaining CRTs: youtu.be/zqUlfMmhJQsOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Explaining the Apollo hardware on display at Seattles Museum of Flight CuriousMarc 2022-11-28 | The superb Apollo exhibit at Seattle's Museum of Flight teaches us a few things about the Apollo command module, the F-1 Rocketdyne engine, the lunar rover, and more, that we didn't know.Apollo Comms Restoration playlist: youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGbApollo Guidance Computer Restoration playlist: youtube.com/playlist?list=PL-_93BVApb59FWrLZfdlisi_x7-Ut_-w7Our sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
The IBM 029 keypunch mechanical keyboard: insanely complicated! CuriousMarc 2022-11-19 | I am repairing the mother of all mechanical keyboards: the IBM 029 keypunch keyboard. And when I say mechanical, I really mean it!See a quick demo of my restored IBM 029 punch: youtu.be/YnnGbcM-H8cKen's blog article on how it works: http://www.righto.com/2017/12/repairing-1960s-era-ibm-keypunch.htmlOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Apollo Comms Part 23: making connectors and a control panel CuriousMarc 2022-11-11 | We remake tricky connectors and a control panel. Shout-out to PCBWay pcbway.com for donating all the PCBs for this episode. Also thanks to Samtec samtec.com for donating the microcoax and connectors. Apollo Comms Playlist: youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGbLinks to doc:curiousmarc.com/space/apollo-s-band-communicationsvirtualagc.github.io/virtualagc/QuestForInfo.htmlibiblio.org/apolloOur sponsors- PCBWay: fast turn PCBs, pcbway.com- ElectroRent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy shirts on Teespring: teespring.com/stores/curiousmarcs-storeLearn more on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
How an Atomic Clock Really Works, Round 2: Zeeman Alignment CuriousMarc 2022-10-31 | We adjust our atomic clocks with the Zeeman effect, and dive even deeper into the quantum world. It's complicated.How an Atomic Clock Really Works, Round 1: youtu.be/eOti3kKWX-cHP 10638A Degausser: youtu.be/hvxX5A1nTIUCathode Ray Tubes and the discovery of the electron: youtu.be/zqUlfMmhJQsOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/aboutMusic Credit: Crinoline Dreams by Kevin McLeod
HP 10638A Degausser: checking vintage HP equipment with more vintage HP equipment! CuriousMarc 2022-10-25 | We over-test the over-engineered HP 10638A Degausser, in preparation for the tuning of the HP 5061A Cesium clock C-Field.Video on how the Cesium atomic clock works: youtu.be/eOti3kKWX-cOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Photo timer... from a B-52! #short CuriousMarc 2022-10-23 | TubeTime brought a fun item from his collection today. Not your everyday photo-timer.Support the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
At the Connections Museum: the insane telephone technology that led to todays computers CuriousMarc 2022-10-20 | We tour Seattle's Connections Museum, and marvel at rarely seen, fully functioning telephone exchange equipment, from the electro-mechanical 1900's to the all-computerized system of the 1970s. Next time you use a modern computer, give a thought to Bell Labs who invented the transistor and the Unix operating system, all driven by the need for better telecommunication technology.Connections Museum YouTube Channel:youtube.com/c/ConnectionsMuseumThe Connections Museum's web page:telcomhistory.org/connections-museum-seattleOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Test Stream CuriousMarc 2022-10-15 | This was an unannounced test, to see if my new setup worked at all. Nothing particular was planned, but we ended up showing a Sony CRT monitor that has lost its green channel and that we were in the process of hooking up to Eric’s CRT rejuvinator, a newly arrived Central Air Data Computer, which is a mechanical analog computer that Ken is reverse engineering, and an Apollo core rope reader that Mike is designing and fabricating. Some glitchy audio and video, but it did work OK for a first try. Viewers’ comments were fantastic, many quite entertaining, and some quite helpful to help me debug the stream with plenty of good advice. Keep it up! Nice to see people hopping on from all over the world! It worked well enough that we should try this again in a more organized fashion in the future.
Open Circuits: Eric cuts through electronic components and reveals their hidden inner beauty CuriousMarc 2022-10-11 | Eric (@TubeTimeUS) went on a rampage slicing through electronic components, teamed up with Windell (Evil Mad Scientist @EMSL) and published a new book. In this video we show how they made the incredible pictures in the book.Buy book or electronic version directly from the publisher:nostarch.com/open-circuits Or just get it on Amazon:amazon.com/Open-Circuits-Beauty-Electronic-Components/dp/1718502346Our sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Helping LGR to restore a vintage Sanyo ICC-0082 calculator CuriousMarc 2022-10-03 | LGR asked for help rescuing a gorgeous Dictaphone 1680 calculator, née Sanyo ICC-0082. We are happy to oblige. And while we are at it, Ken reverse engineers the enigmatic General Instrument chipset that makes it tick.LGR's original video: youtu.be/Sq_GFKpPhnYOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Apollo Comms Part 22: How NASA Upgraded the Moon TV to Color CuriousMarc 2022-10-02 | Barely a year after the first black and white TV transmission from the Moon, NASA upgraded it to color. This is how this was done, and we try it on our original Apollo link too.Apollo Comms Playlist: youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGbStan Lebar interview at the Early Television Museum: youtu.be/Hjxi6r6TPr4Links to doc:curiousmarc.com/space/apollo-s-band-communicationsvirtualagc.github.io/virtualagc/QuestForInfo.htmlibiblio.org/apolloOur sponsors- PCBWay: fast turn PCBs, pcbway.com- ElectroRent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy shirts on Teespring: teespring.com/stores/curiousmarcs-storeLearn more on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
Playing with Cathode Ray Tubes (CRTs - with full explanation) CuriousMarc 2022-09-12 | We explain how Cathode Ray Tubes (CRTs) were invented and how they work, and hook up a few to light them up. They are as intimidating as they are awesome. But did you know that they led to the discovery of the electron, and the birth of a new field, electronics? And of course the invention of the oscilloscope and modern TV!Link to Eric's scope clock design info: github.com/schlae/crt-driverOur sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
USS Hornet and the forgotten Apollo AS-202 mission CuriousMarc 2022-09-02 | We visit the USS Hornet and learn about the important but forgotten Apollo AS-202 mission, its recovered capsule, as well as recovery operations for Apollo 11 including a peek at the mobile quarantine facility.Corrections: Since I posted the video, astute viewers corrected a few errors in the video (thank you all)- the photo of the Saturn IB AS-202 booster being hoisted is not at Stennis for a test, but on launch pad 34 at Cape Kennedy for final stacking.- the staging footage is the second stage S-IVB separating from the S-IB booster, not from the S-IVB / CSM staging.- the astronauts were in the MQF for only 65 hours, not two weeks. The MQF was flown back to Houston were the astronauts transferred to special isolation quarters to spend the rest of their quarantine in much more comfort.Our sponsors- PCBWay: fast turn PCBs, pcbway.com- Electro-Rent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.comSupport the team on Patreon: patreon.com/curiousmarcBuy our merch on Teespring: teespring.com/stores/curiousmarcs-storeGet more info on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/aboutMusic: Legend of Zelda - 10 Rupees, by Neskvartetten (OCR Remix)
Apollo Comms Part 21: TV from the Moon CuriousMarc 2022-08-21 | Our first successful video transmission using the original Apollo comms hardware. And sadly we don't have a real Apollo moon camera, so we have to cobble one together ourselves.Apollo Comms Playlist: youtube.com/watch?v=v49ucdZcx9s&list=PL-_93BVApb58SXL-BCv4rVHL-8GuC2WGbLinks to doc:curiousmarc.com/space/apollo-s-band-communicationsvirtualagc.github.io/virtualagc/QuestForInfo.htmlibiblio.org/apolloOur sponsors- PCBWay: fast turn PCBs, pcbway.com- ElectroRent: electrorent.com- Keysight: test instruments: keysight.com- Samtec: connectors: samtec.com- R&D Microwaves: rdmicrowaves.comSupport the team on Patreon: patreon.com/curiousmarcBuy shirts on Teespring: teespring.com/stores/curiousmarcs-storeLearn more on the companion site: curiousmarc.comContact info: youtube.com/curiousmarc/about
