Hi Paul,
After dismantling and inspecting a 70V many years ago, I built a six meter
water-cooled amp using the 3CV1500, a quart of D-I water and a surplus
transmission cooler with a muffin fan...seriously. Darn, those amps run
cool. Wish I still had it.
Steve WB2WIK/6
"Each success only buys an admission ticket to a more difficult problem." --
Henry Kissinger
> -----Original Message-----
> From: Paul Christensen [SMTP:paulc@mediaone.net]
> Sent: Friday, October 05, 2001 11:43 AM
> To: Tim Kass; Steve Katz; 'Terry Gaiser'; 'Bill Smith';
> amps@contesting.com
> Subject: Re: [AMPS] ALPHA 374A
>
> Looks like the 374 was produced with three 8874s and two with the 374A.
> See the following link for a complete listing of legacy
> Alpha Amplifier specs...
>
> http://www.alpha-amps.com/html/legacy.htm
>
> For those intersted, detailed pictures of my vapor-cooled Alpha PA70-V are
> also listed on this page. Click on the "70-V" model
> number for the images.
>
> 73,
>
> -Paul, W9AC
>
> ----- Original Message -----
> From: "Tim Kass" <tkass@forpsych.org>
> To: "'Steve Katz'" <stevek@jmr.com>; "'Terry Gaiser'" <w6ru@bak.rr.com>;
> "'Bill Smith'" <ko4nrbs@yahoo.com>; <amps@contesting.com>
> Sent: Friday, October 05, 2001 1:56 PM
> Subject: RE: [AMPS] ALPHA 374A
>
>
> >
> > The 374 has 2 8874, as does the 274, but added 160 meters on it, where
> the
> > 274 did not....the 374A came later... 73 Tim
> >
> >
> >
> >
> >
> > -----Original Message-----
> > From: owner-amps@contesting.com [mailto:owner-amps@contesting.com]On
> > Behalf Of Steve Katz
> > Sent: Friday, October 05, 2001 12:44 PM
> > To: 'Terry Gaiser'; 'Bill Smith'; amps@contesting.com
> > Subject: RE: [AMPS] ALPHA 374A
> >
> >
> >
> > Not my 374A! Hmmmm...it's possible they changed something during the
> > multi-year sales cycle of this product, but the "374" meant "3 x 8874"
> and
> > used 3 tubes -- at least mine does. They also had a "274" which was "2
> x
> > 8874" and used two tubes. Mine exhausts out the rear, exclusively.
> There's
> > no holes in the top, at all.
> >
> > WB2WIK/6
> >
> > "Each success only buys an admission ticket to a more difficult
> problem." --
> > Henry Kissinger
> >
> > > -----Original Message-----
> > > From: Terry Gaiser [SMTP:w6ru@bak.rr.com]
> > > Sent: Friday, October 05, 2001 8:36 AM
> > > To: Steve Katz; 'Bill Smith'; amps@contesting.com
> > > Subject: Re: [AMPS] ALPHA 374A
> > >
> > > I think you are mistaken ... the 374A does exhaust out the top ... has
> 2
> > > tubes ... no bandpass mode on 10 meters.
> > > Terry W6RU
> > >
> > > ----- Original Message -----
> > > From: Steve Katz <stevek@jmr.com>
> > > To: 'Bill Smith' <ko4nrbs@yahoo.com>; <amps@contesting.com>
> > > Sent: Friday, October 05, 2001 7:22 AM
> > > Subject: RE: [AMPS] ALPHA 374A
> > >
> > >
> > > >
> > > > I purchased a 374A in "mint" condition a few years ago for $1295,
> and
> > > felt
> > > > that was a reasonably good deal. Obviously, the cost of three new
> > > > replacement tubes is about that! For one with very few hours on the
> > > tubes
> > > > and in factory-fresh condition, I'd have likely paid a bit more.
> > > >
> > > > When you say "full output," is that in the bandpass (no-tune) mode?
> If
> > > so,
> > > > and you get full output on 10m in the bandpass mode, that's
> wonderful,
> > > and
> > > > unusual for such an oldie, probably means the owner never messed
> with
> > > it!
> > > >
> > > > Only caveat I can think of is that the 374A needs to be installed
> where
> > > > there's a lot of breathing room behind it. It does not vent or
> exhaust
> > > out
> > > > the top, but out the rear, and the output duct is very small (as
> you've
> > > > likely noticed) and blows a steady stream of very hot air under
> key-down
> > > > condx. That air needs to blow, unrestricted, for quite a distance.
> I
> > > > wouldn't place anything behind the amp for about 12" or so. Other
> than
> > > > that, it's a rather amazing amp that has proven itself a workhorse
> in
> > > > hundreds of contest stations around the world...
> > > >
> > > > WB2WIK/6
> > > >
> > > > "Each success only buys an admission ticket to a more difficult
> > > problem." --
> > > > Henry Kissinger
> > > >
> > > > > -----Original Message-----
> > > > > From: Bill Smith [SMTP:ko4nrbs@yahoo.com]
> > > > > Sent: Thursday, October 04, 2001 7:08 PM
> > > > > To: amps@contesting.com
> > > > > Subject: [AMPS] ALPHA 374A
> > > > >
> > > > >
> > > > > I've found a Alpha 374A amplifier that has not been
> > > > > used for several years. The guy says he'll sell it
> > > > > but does not know what it may be worth. It is in very
> > > > > clean condition and when checked out today had full
> > > > > output. It is in orginial condition with no mods.
> > > > > It's pretty obvious this amp has not been used much!!
> > > > > There isn't a scratch on it anywhere.
> > > > >
> > > > > What is a fair market price for this amp? Does the
> > > > > Alpha 374A have a good reputation?
> > > > > 73,
> > > > > Bill Smith KO4NR
> > > > >
> > > > > =====
> > > > > Bill Smith KO4NR
> > > > >
> > > > > --
> > > > > FAQ on WWW: http://www.contesting.com/FAQ/amps
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> > > >
> > > > --
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> > > > Administrative requests: amps-REQUEST@contesting.com
> > > > Problems: owner-amps@contesting.com
> > > >
> > > >
> >
> > --
> > FAQ on WWW: http://www.contesting.com/FAQ/amps
> > Submissions: amps@contesting.com
> > Administrative requests: amps-REQUEST@contesting.com
> > Problems: owner-amps@contesting.com
> >
> >
> > --
> > FAQ on WWW: http://www.contesting.com/FAQ/amps
> > Submissions: amps@contesting.com
> > Administrative requests: amps-REQUEST@contesting.com
> > Problems: owner-amps@contesting.com
> >
--
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