[Elecraft] [K2] Amplifier suggestions?

[w5ov at w5ov.com]

4CX800's have not been discontinued.

The truth is that the old military version of it, the GU74B is no longer
produced. Gone with it is the low price of less than $100 a piece for
those old, dark gray, tarnished-looking tubes.

4CX-800's are being made all the time,and they look nice and shiny like
Eimac tubes, and they have an equally "Eimac-level" price of about $500
each!

73,

Bob W5OV
Array Solutions
(THP and Acom Dealer)


'>
> I haven't operated an Acom, but note that it uses 4cx800's (as do a few
> other
> companies). Those have been discontinued, and not having a future source
> of
> tubes could be a concern. That's why Alpha switched the tube in its 8400
> from 4cx800's to a 4cx1000's (new model is an 8410).
>
> The THP is a nice amp, but bear in mind that solid state amps are more
> sensitive to SWR issues than tube amps. If you don't have good resonant
> antennas, a tuner may be essential. I also found that the THP 1.5 required
> 100 watts plus from my K3 to drive it to full or close to full power,
> whereas my PW-1 and Alpha 87A required a lot less for full output.
>
> If I were looking for a non auto-tune tube amp, I'd seriously consider the
> Alpha 8410, perhaps one that uses 3-500Z's (inexpensive and readily
> available). Not sure where I'd go on an autotune tube or a solid state
> amp,
> other than what I'm currently using.
>
>
> 73,
>
> Lou
>
>
>>I am thinking about a move up in power for my K2/100.  The reviews
>>seem to favor an Acom 1000 or Tokyo Hi-Power.  What is the collective
>>wisdom here? Thanks
>>Dave  K6CGE
>
>
> -----
> St. Louis, MO
> K3 #2513
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