[Elecraft] [K2] Amplifier suggestions?

[W0MU Mike Fatchett]

Alpha or Acom.  I had a THP and it was nothing but trouble.  Maybe I got the
lemon.  They look nice but just did not seem to hold up very well.

I have an Alpha 99 and love it and have owned other Alphas in the past and
they were all solid.  

I have the Acom 1000 and it is great to have an amp on 6m.  It tunes easy
and works great.  It is small enough to consider for a dx pedition or
contest expedition.

Mike W0MU


CC Packet Cluster W0MU-1
W0MU.NET or  67.40.148.194




-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of W0FK
Sent: Tuesday, January 19, 2010 10:15 AM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] [K2] Amplifier suggestions?


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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