[AMRadio] My Amplifer Quest took a strange turn today


crawfish crawfish at surfmore.net
Sat Apr 21 07:57:25 EDT 2007


I found a grid-driven version using two 813's in the 1966 ARRL Handbook.

Joe W4AAB
----- Original Message -----
From: "Craig K6QI" <k6qi at yahoo.com>
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Sent: Saturday, April 21, 2007 1:47 AM
Subject: Re: [AMRadio] My Amplifer Quest took a strange turn today


> I built one of those in about 1970. It was 2 813's in
> grounded grid. Worked like a champ. I laid mine out a
> bit different, I had a small rack with the RF deck on
> the top, power on the bottom. I'm pretty sure it was
> out of an early 60's ARRL Handbook. I used a rotary
> inductor so it would tune anything. I ran a Heathkit
> Apache/SB10 SSB adaptor directly into it. Might need
> to put a tuner between it and a modern rig.
>
>
> --- Bow <kd5kzn at sbcglobal.net> wrote:
>
> >
> > Yup, I headed to the local Radio store to have my
> > Yeasu 2 meter rig looked
> > at (no TX). I found it it is a dead-duck, probably
> > the processor, it will
> > make a nice paperweight...
> >
> > ANYWAY...
> >
> > I'm talking with the owner about the fact I was
> > looking for an amp, prefer
> > tubes, mainly for use on 75M and maybe 10M... Around
> > 600-700 watts...
> >
> > He thinks a bit and then rotates to his right and
> > points up on the top
> > shelf...
> >
> > "It was left here for a repair about 1.5 years ago,
> > I got it repaired, the
> > guy never picked it up... It is set-up for 75M and
> > 40M.. Pair of 813's...
> > Everything checks good on it, it's a nice amp..
> >
> > You can get it off my damn shelf for $75..."
> >
> > I couldn't reach for my wallet fast enough...
> >
> > Now the fun part begins... Can anyone ID it, or
> > maybe point to a handbook
> > that is may have come out of so I can get a
> > schematic??
> >
> > Here It Is:
> >
> > http://riley-music.com/BowsStuff/AMP/02Front.JPG
> >
> >
> http://riley-music.com/BowsStuff/AMP/04%20RightSide.JPG
> >
> > http://riley-music.com/BowsStuff/AMP/05LeftSide.JPG
> >
> > http://riley-music.com/BowsStuff/AMP/06Rear.JPG
> >
> >
> http://riley-music.com/BowsStuff/AMP/07PowerTranny.JPG
> >
> >
> http://riley-music.com/BowsStuff/AMP/08CoilAndCaps.JPG
> >
> > http://riley-music.com/BowsStuff/AMP/09_813a.JPG
> >
> >
> http://riley-music.com/BowsStuff/AMP/10_813bChoke.JPG
> >
> > http://riley-music.com/BowsStuff/AMP/11Interior.JPG
> >
> > And Even though I have not fired it up yet, I did
> > light off the filaments...
> > I think EVERY piece of tube gear should have a
> > window...
> >
> >
> http://riley-music.com/BowsStuff/AMP/12MagicInTheWindow.JPG
> >
> >
> http://riley-music.com/BowsStuff/AMP/13Glowin813s.JPG
> >
> >
> > So, can anyone help me ID my score?!?!?
> >
> > Bow
> >
> > W5EFR
> >
> > --
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> > 17:56
> >
> >
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> >
> >
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