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previous: R.G. Re: parasite cap and slew rate -- 9/4/2000 8:16 PM

fender deluxe model 5C3

9/5/2000 7:42 AM
jacques	fender deluxe model 5C3 you can find this shematic in the TUBE AMP BOOK. The tone pot is connected to a .0005 cap. In an attempt to some repair, I tried to change this cap. The entire sound of the amp changed. I had to solder it back as quickly as I could, really afraid to loose forever the lush sound of this marvelous '52 amp. Anyway, if you admit these two points (thermic ohm law and parasitic capacitance) have a very very small effect, we can say that the 2 circuits are different, even in a very slight way. Isn't it the point I try to prove? The only remaining problem would be: are these small difference audible? If I say yes and you say no, maybe we can just call it a biologic matter.

9/5/2000 7:42 AM

jacques

fender deluxe model 5C3

you can find this shematic in the TUBE AMP BOOK.

The tone pot is connected to a .0005 cap.

In an attempt to some repair, I tried to change this cap.
The entire sound of the amp changed.
I had to solder it back as quickly as I could, really afraid to loose forever the lush sound of this marvelous '52 amp.

Anyway, if you admit these two points (thermic ohm law and parasitic capacitance) have a very very small effect, we can say that the 2 circuits are different, even in a very slight way.

Isn't it the point I try to prove?

The only remaining problem would be:
are these small difference audible?
If I say yes and you say no, maybe we can just call it a biologic matter.

Replies:

R.G. q{The tone pot is connected to a .0... -- 9/6/2000 1:47 PM
GFR If the order of assembly cares, you... -- 9/6/2000 4:56 PM