Tube Amp Archive

Mike, I resolved the issue. It's not the board. Thanks for your opinions on the mod. I'm happy with what the mod yielded and I'm familiar with Cesar changing the transformer as well and the EV speakers. I may put it back stock one day, but I'm quite happy with the results. It's most definitely a pla...

It was the Vibrato disconnect...fixed! I disconnected it as I didn't have a switch pot

butwhatif wrote:If you lifted the connection between the input to the phase inverter and the 50k intensity pot, it will increase hiss and gain. The 50k pot loads the input to the PI quite a bit.

I disconnected it at the lug on the intensity pot.

Lotta stuff to check out tomorrow when the kids are down for a nap

Anyway, I'm also going to look at the 3M3 on the reverb return...that's a strong possibility... That's an easy one, just bridge over it with a clip lead. The gain will go through the roof and the reverb won't work, biut you'll find out if that's the problem. The gain will not only go through the ro...

Looks like you replaced most of the likely suspects, carbon comps. But that would be my suspicion, a noisy resistor somewhere. Any way to isolate it further without replacing all the other carbon comps? Personally I think it's most likely from something you did. You may have put in a bad resistor/c...

Structo wrote:Looks like you replaced most of the likely suspects, carbon comps.
But that would be my suspicion, a noisy resistor somewhere.

Any way to isolate it further without replacing all the other carbon comps?

Been in the process of modding my '66 Super Reverb to a Cesar Diaz spec I have...the amp is definitely players condition...repro cab, non original speakers, lots of road wear, so no worries by me on modding it. It's my player. Anyway...I'm having some hiss...was having some hum, fixed that. http://p...