[Amps] Considering an Alpha 76PA

[Gary Smith]

Carl,

Is that the low drive mod I've read about?

I'm perfectly happy with 1200 watts out, especially if I don't need 
much drive to get that. Pushing to get the max out just doesn't make 
it worth the wear & tear to me.

Is the three hole 76 QSK or does it have a standard relay? 

Years ago I made a QSK for my old heath 220 using Rich Measures 
circuit. It worked very well but I no longer have any of those vacum 
& reed relays nor optoisolators. 

I do have my dad's old Johnson t/r switch but don't see how I can use 
that with a corsair & amp for qsk. I need to think about that a 
bit...

Gary
ka1j

> No, it has 10 470 Ohm 2W carbons in parallel.
> 
> Carl
> KM1H
> 
> 
> ----- Original Message ----- 
> From: "Mike, K6BR" <noddy1211 at sbcglobal.net>
> To: <amps at contesting.com>
> Sent: Wednesday, October 31, 2007 3:00 PM
> Subject: Re: [Amps] Considering an Alpha 76PA
> 
> 
> > Does it have a tuned input?
> >
> > Mike
> >
> > -----Original Message-----
> >
> >
> > The nice thing about the 3 holer is that 100W of drive is split 3
> > ways and doesnt overdrive. Keep that grid current down, limit output
> > to 1200-1300W and they will have a long happy life. Problems start
> > when owners try and get
> >
> > 1800W out.
> >
> > Carl
> > KM1H
> >
> >
> > ----- Original Message ----- 
> > From: "Roger" <sub1 at rogerhalstead.com>
> > To: <Gary at doctorgary.net>; <amps at contesting.com>
> > Sent: Wednesday, October 31, 2007 2:28 PM
> > Subject: Re: [Amps] Considering an Alpha 76PA
> >
> >
> >>
> >>
> >>
> >>>I own(ed) an Alpha 77SX serial 2931 & it went to ETO for
> >>> repair after an internal arc-over. They lost track of it when they
> >>> relocated & I'm still out an amp or compensation. Someone,
> >>> somewhere has my 77SX that ETO/Alpha should have returned to me
> >>> but never was.
> >>>
> >>> I need another amp and am considering an Alpha 76PA as I remember
> >>> using one at field day and it seemed like a fairly straight
> >>> forward amplifier. I'll be using it with a corsair II.
> >>>
> >>> I have no idea what ta 76pa is selling for but I know the tubes
> >>> are hugely overpriced to replace. Anyone know of one of these amps
> >>> in decent condition?
> >>
> >> The 76A is a nice amp. The only real considerations are watching
> >> the grid current on tune up and of  course the price of the tubes.
> >> There are two versions with the difference being 2 or 3 tubes.
> >> There's a pair of 8874s on e-bay at present with the current
> >> bidding over $700 for the pai.   I've seen very nice ones go for
> >> $750 USD and some scruffy ones that needed the panel replaced (bad
> >> paint) for over $1500.  Typically the prices do vary over the range
> >> listed with nice ones covering the whole range, but I'd say the
> >> nice two tube tend toward $1000 to $1200 with the three tube units
> >> going for a bit more.
> >>
> >> I've been using the two tube version for some years now and it's a
> >> great conventional amp that has very little cooling noise. Others
> >> may have a different opinion.
> >>
> >> BTW, it's warm enough my BIG cat likes to sleep on it so I have to
> >> look to see where he is before firing up.
> >>
> >> 73
> >>
> >> Roger (K8RI)
> >>>
> >>> Any caveats with this amp I should consider?
> >>>
> >>> Thanks
> >>>
> >>> 73,
> >>>
> >>> Gary
> >>> ka1j
> >>>
> >>> offlist is fine if you know of one that's available.
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