[Phil Allison[_3_]]

"Patrick Turner"
Phil said....

" The Deluxe Reverb is a re-issue."

** But no Fender amp is called that.
Kindly post the name printed on the face plate.

The front plate on amp chassis has Deluxe Reverb in written white
lettering.


** Not " Deluxe Reverb-Amp " ???


Silver cloth face has "Fender"
Black cabinet, 12" speaker.
The schematic has '65 Deluxe Reverb' and created and plotted dates on
schematic are February and July 1993.


** So yes - a "Deluxe Reverb-Amp".


Amp has wear and tear and looks 20 years old, but it sure ain't from 1965.

** Those 3 PCBs are a dead give away.


This tiny amount of NFB does hardly anything to flatten the
signal at the speaker. The signal response at has a 6dB peak
at 100Hz and +6dB at 2kHz, relative to 1kHz level. So the
Vo merely outlines the speaker Z which is to be expected..

** Err - no

Regular guitar ( and most other) speakers don't double impedance with a one
octave change in F above 1kHz.

It takes 2 octaves, at least.



Phil implies moving grid stoppers 1k5 at PCB to tube sockets might do
something, because Fender did it in the past, but such a move would do
SFA.
Maybe **increasing** grid stoppers to say 4k7, 6k8, 10k0 *might* have an
effect.

** What ever it takes....

But what I done loads the 6V6 with 9.4k a-a above about 30kHz, thereby
stopping the oscillations.

** A simple zobel at the speaker output would do as well.


Possibly this amp could be converted to use EL34,

** Sacrilege !!!

Conversion to use Sovtek 5881s is OK, though.

Otherwise, using JJ brand 6V6s is practically mandatory.

SFA difference between the two tubes - really.



.... Phil