The 374 is a lot like the 76a, if I remember right.
If so, the 374 manual tuning will cover 3-30mc
just fine. Alphas have been sold to science and testing labs and
for diathermy (sp?) everywhere and thus must
tune all freqs below 30mc. One ham, yrs ago,
used an Alpha to irradiate grass seeds to see
if they grow better in RF fields.
The only thing other than freq coverage u get
going from Heath to Alpha is the label. Of course,
there are southern boys who get 3 to 3.5 KW out,
that is out, from their three hole 76 just by loading
them up and driving them hard.... watching grid
current always. But the 3-500z Henrys seem to
be lots more stingy.... Stand back, and watch out,
however, from
the Henry 3K, 4K and 5K etc..... (Isn't there a 5K?).
73
Charles Harpole
k4vud@hotmail.com
> Date: Sun, 2 Aug 2009 20:03:51 -0500
> From: chasm@texas.net
> To: amps@contesting.com
> Subject: [Amps] Alpha 374A ?
>
>
> The 374A being a typical tube amp, I assume that it is NOT going to be
> capable of tuning in the MARS portions of the various bands to include
> 30 and 60meters without a lot of effort from my Dentron MT3000A.
>
> The only amp that I am aware of which will tune continuously, all freq
> from one end of the band plan to the other, is the Henry 4K Ultra (and
> that is limited to 3.5-30mc).
>
> Now I am hearing that this is also true of the 374A in spite of my
> reading of the manual.
>
> How well does the 374A handle 60 meters?
>
> what output should I expect with a set of 3CPX800A7s?
> what is the warm up time for this tube?
>
> any other comments on this amp vs my fully modded Heathkit SB220?
> iow, considering the difference in prices between the two, is the 374A
> going to be worth the extra $$$?
>
> 73
> chas k5dam
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