From kalimusi–(at)–sa.net Thu Nov 14 11:04:09 CST 1996
Article: 27440 of alt.guitar.amps
Path: geraldo.cc.utexas.edu!cs.utexas.edu!howland.erols.net!newsfeed.internetmci.com!news.campus.mci.net!not-for-mail
From: murali
Newsgroups: alt.guitar.amps
Subject: Re: Fender Princetons? are they any good?
Date: Thu, 14 Nov 1996 02:55:35 +0000
Organization: CampusMCI
Lines: 57
Message-ID: <328A8A26.239--(at)--sa.net>
References: <5653lt$r7--(at)--ews.onramp.net> <19961110224300.RAA1448--(at)--adder01.news.aol.com>
Reply-To: kalimusi–(at)–sa.net
NNTP-Posting-Host: s03-pm12.snaustel.campus.mci.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Macintosh; U; 68K)

aguyathom–(at)–ol.com wrote:
>
> someone wrote:
> >Nick, I’d have to disagree with this (although I do agree with the
> >rest of your posting). Except for the ground switch, which was added
> >around 1970, the silverface Princeton Reverbs up through the late
> >’70s are electrically identical to the blackface amps.
>
> Any of you technogods want to confirm or deny that?
>
> NS
>
> <><><><><><<><>
Don’t cut up a good untouched one. Even the silverfaces are
> guaranteed to become collectible in the next few years because of their
> unaltered by the “evil” CBS circuitry. In my opinion there is not a better
> garage sized or home recording amp made by anyone than the old Princetons
> and Deluxes(although a Deluxe can get VERY loud).
> Jeff Deasey
> DLS
> Builder and Repairman to the NON-Stars!!!!
> Ontario, California

Once again I agree. The push pull switch on my ’72 SF Princeton toggles
between a. .0047 mfd cap wired directly from pin 1 of V1 to the Volume
control (bypassing the tone controls), and 620 pfd (two caps: 500 pfd +
120pfd paralleled) between pin 1 and the tone circuit.
With the .0047 clicked in, and the tone controls bypassed, the sag is
amazing, sounding very punchy, like quick attack 4:1 compression,
especially playing on the G, B, and E strings with a strong attack. I
also tried different V1s: the GT ECC83 is the easiest to overdrive
compared to 12AX7A, 12AX7A R, and 12AT7.
620 pfd (switch pushed “in” and treble and bass controls engaged) almost
eliminates the compression and gives more midrange and less brilliance
than the stock 250 pfd, though still pushing V1 a bit harder. Model 5C2
(c. 1948) uses .0005 mfd between the tone and volume control (which =
500 pfd), as does the Brown 6G2 that our friend in Hawaii was so
fortunate to find.
One difference between 6G2 and AA964 is the +100 vdc change in plate
voltage out of the GZ34 rectifier, but a comparison of the schematics
shows they have alot in common.

“Actually the SF and BF Princeton trems work on the power tubes also.
But
as far as getting a fat and nasty tone, your brown amp would be all over
them.

Tim”

I’d like to have both these amps (6G2 and offspring) in one room to
compare. I’d be willing to bet the AA964 can easily be tweaked to back
to Brown. Mine has a 20 oz. ceramic magnet 10″ Eminence and it does fat
and nasty real good. I just found a ’70 Oxford 10″ taken from a
Princeton to put into mine. Can’t wait to try it out.

your friend
Murali