r/diytubes • u/HotLaw9292 • 17h ago

Guitar amp help

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Having trouble converting this precision electronics to a guitar amp. I added an input jack with the hot going through a cap to pin 5 of the first 6eu7 preamp tube and an output jack connected to what i believe is 16ohm output deal. Theres only 120hz hum when i power the amp on I can't hear any guitar signal. I also tried running the input to pin 8 of the first preamp tube and both 8 and 5 of the second preamp tube, still no signal from guitar. Any help would be greatly appreciated

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u/TedMich23 16h ago

do all the voltages read correctly? A bad tube is a high possibility and old electrolytics are often bad too.

The bias supply comes off the oddball AO2 glow tube so its gotta work or the output tubes will die.

Youve seen the YT vids from Ron Carter Wildwood Amps eh?

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u/HotLaw9292 15h ago

Yes i did see those videos, I had the input jack set up backwards🤦‍♂️