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Subject: Re: Got Fender amp

From: "J. Larry Hendry" <jlarryh@...
Date: 1999-10-23

> From: JWBarlow@...
> I don't have any of those "Amps of the Stars!!!!" books,
> but I do have a big technical tube amp book called:
> "The Tube Amp Book 4.1th Edition" by Aspen Pittman.
> It shows several schematics for Super and Super Reverb
> amps. The tube list for the Super Reverb is 4 - 7025,
> 2 - 12AT7, 1 6L6 duet, and possibly a 5U4. Does that look
> familiar? I'm assuming it's a silver face too.

Hey, anything in that book about the Dual Showman? While Paul was awaiting
his shipment, I actually purchased a Dual Showman (head only). Although
this one is in fine working order, a schematic would be nice to have.
However, back when I went to 'lectronics school, we learned to fix tube
amps without schematics. The Dual Showman uses the same 6L6 push-pull
arrangement as the super reverb and bandmaster, except it has two pair in
parallel. Officially, Fender rated it for 85 watts I think.

> The Supers I'm familiar with were 40 watts (I think) at 2
> ohms with the 4 10s in parallel.

Wow! I didn't remember that the total speaker cabinet impedance was that
low. I guess I always assumed that the 4 speaker cabinets were series /
parallel so that the cabinet impedance was the same as one of the speakers.
Of course, I was only 17 and slightly influenced by recreational drugs
when we were using these things in high school. However, the wattage you
remember should be about right. 2 6L6s should yield about 35 to 45 watts. I
think about 22 or 23 watts each was about all the heat the plate could
handle.

Larry (feeling old talking about tubes) Hendry