Marshall JCM2000 TSL122 Valve Bias adjustment
Hi, this is the last section of a big repair, the valves kept blowing holes in the board. I thought I'd show how to bias the EL34 valves setting each side to 90 milli-volts (although i said milliamps) 93 milli volts was close enough to 90. For a coffee :) (Costa) https://paypal.me/JohnBonYouTube
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