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I spoke with an engineer at the Alpha booth at Dayton last year. At the
time, I had an Alpha 76PA (3-holer / 3-8874's). He told me that when
that particular series of amps were built that the FCC power limits were
the 1 KW input rating (not 1500 watts out, like it is now), and that the
amplifier should not be pushed harder than 400 watts output (carrier)
per tube (800 W out for 2-8874's, 1200 watts out for a 3-8874's.) I was
hoping it would do the legal limit, but he very strongly cautioned me
against me trying to run more than 400W/tube.
Now I have an Alpha 89, so no problem.
Larry K7LJ
Tom Osborne wrote:
>
> Dan Levin wrote:
> >
> > In my continued search for cheap full output amps, it
> > has become clear that Alpha 76 and 374 amps with 3
> > 8874's are available for around $1150 or so in good
> > shape. Does anyone have an opinion about their
> > suitability for SSB contest use? Do they put out
> > 1500 watts?
> >
> > Thanks!
> >
> > ***dan, K6IF
>
> Hi Dan
>
> A friend of mine, W7IVX, had a "two holer" and he could run over
> 3 kw with it. The only problem is tube replacement. They cost
> about $1800 apiece. Also I understand they are not hard to
> destroy if mistuned. 73
> W7WHY
>
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