Tube Amp Archive

I would check resistors r78 and r79. They are the 5w ones in the bottom middle of the main board. They set the relay and reverb voltages. Fender has since changed them to a 330ohm. I recommend checking if they're open and the solder joints. I've had over 40 of the hot rod series in my shop this year...

Do these transformers sound good with only non hrm? I have a couple different variations on the non. I would like to do a hrm with reverb.

Thanks that's kind of what I was thinking. I've built a lot of amps and I just can't get away from the el34 sound. I got this hd130 with a jbl 15 and its just calling for a conversion.

What if you have the pt that has the hi low power switch on the primary side? Can you just use the low setting and leave the high one unconnected? I have a hd130 that is doing nothing and has the switch on the primary side and would like to convert it over.