TheAmpNerd
Member
- Messages
- 1,056
Okay y'all.
In keeping with the spirit of TGP and knowing how some of you have
a fit about gutting an amp and rebuilding it.
We can do this a cap at a time!
You make the call!
The amp is a 1966 Ampeg Model J-12D Jet.
The amp hums like crazy and the tremolo doesn't work.
So far I've done the following:
+ Replaced the mutisection cap
+ Replaced the bypass caps
+ Replaced the tone pot (original was coming apart).
+ Cleaned and lubed all the pots
+ Cleanded and tightened all sockets
+ Cleaned and tested tubes and tube pins
+ Cleaned the input jacks, including ground and switch
The voltages and specs are as follows:
(I'll post them when I find my lab book)
I have three and the one with these measurements
is hiding from me.
Here is a pic of circuit:
That's right, I'll label all the coupling caps from left to right
and include my measurements (when I find the lab book).
In keeping with the spirit of TGP and knowing how some of you have
a fit about gutting an amp and rebuilding it.
We can do this a cap at a time!
You make the call!
The amp is a 1966 Ampeg Model J-12D Jet.
The amp hums like crazy and the tremolo doesn't work.
So far I've done the following:
+ Replaced the mutisection cap
+ Replaced the bypass caps
+ Replaced the tone pot (original was coming apart).
+ Cleaned and lubed all the pots
+ Cleanded and tightened all sockets
+ Cleaned and tested tubes and tube pins
+ Cleaned the input jacks, including ground and switch
The voltages and specs are as follows:
(I'll post them when I find my lab book)
I have three and the one with these measurements
is hiding from me.
Here is a pic of circuit:

That's right, I'll label all the coupling caps from left to right
and include my measurements (when I find the lab book).