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What was Ampeg Thinking with This Board Design?

In this video, we'll service a 1970s Ampeg GU12 guitar tube amp combo. This one features one of those GE Compactron 6U10 tubes and a 7591 push-pull output. They got some stuff right with these 70s amps and got some stuff stupid. Let's discuss. PART 1:    • What was Ampeg Thinking with This Boa...   PART 2:    • Amp Wars - The Ampeg Strikes Back   PART 3:    • He Heard a POP...Then Came SMOKE!   PART 4:    • Has God Finally Forsaken the Ampeg Ch...   -------------------------------------------------- Check out our sponsor, Native Sons Goods: http://www.nativesonsgoods.com/   / nativesonsgoods     / nativesonsgoods   ----------------------------------------------------------- WAYS YOU CAN SUPPORT THIS CHANNEL: ♠Stand in the Middle of the Street Naked Screaming "LONG LIVE THE GUITOLOGIST"! OR ♠Send an unwanted piece of gear or send a small tip via Paypal: [email protected] Thanks for your support! ♠STUFF I USE -5A Variac: http://amzn.to/2FNWthU -Jameco Isolation Transformer: https://amzn.to/2PRv1Fa -Fluke 87: http://amzn.to/2DwHjvr -Yotec 936 Soldering Station: http://bit.ly/2JqB1Vw -Sealody SSA51 soldering station: http://amzn.to/2DJTS7P -Black and Decker Heat Gun: http://amzn.to/2DWpDhr -Geekcreit® LCR-T4 Mega328 Transistor Tester http://bit.ly/2J9uLSA -HT02 Handheld Infrared Thermal Camera http://bit.ly/2LXfLoD -Solderless Breadboard: http://bit.ly/2stkVAq -Breadboard Jumper Wires: http://bit.ly/2JowaEh -Geekcreit® XR2206 Function Signal Generator DIY Kit http://bit.ly/2LYBvkb -Contact Cleaner: http://amzn.to/2FVitro -Deoxit Fader Cleaner: https://amzn.to/2LPwtsE ♠RECORDING -JVC Everio Camcorder https://amzn.to/2RLIleU -Andonstar USB Microscope: https://bit.ly/2q8QIWz -Articulated Boom Arm with Cam Mount: https://amzn.to/2Hlo2AX -Shure Beta 87A https://amzn.to/2rNPnoW -EV 635A Omnidirectional Dynamic Mic https://amzn.to/2pR8HQT ♠BOOKS -RCA TUBE MANUAL http://amzn.to/2GOBVqS -DESIGN AND CONSTRUCTION OF TUBE AMPLIFIERS: http://amzn.to/2HSNMne -Designing Tube Preamps for Guitar and Bass: http://amzn.to/2DK5tmt ♠2006 FENDER AMERICAN STD TELECASTER PICKUPS -TV Jones Magnatron Neck: https://amzn.to/2q1zQjD -Seymour Duncan Vintage Stacked Bridge: https://amzn.to/2GyZjrK