A few years ago, after completing my first K2, I had investigated the
Tokyo Highpower amplifiers. I exchanged emails with a salesman at Tokyo
Highpower and he was very cooperative. The delivered price of the 100
watt amp was about $450 shipped from Japan. Considering everything it
was not a bad price. But then the KPA100 was announced and the choice
was obvious. BTW my very early KPA100 went together without a hitch and
worked perfectly on all bands. I operated mostly SB with it not being
quite the cw op I am now.
73, Doug -- KØDXV
Joseph Reed wrote:
Doug, Fred, and all,
I had forgotten about the 405! But you are also correct Tokyo Highpower makes
two models of amplifters, a 50 watt and a 100 watt. There was also an article
in QST in the last year or two that described the type of amp Fred was looking
for.
Fred(FL) don't forget to check E-Bay as they frequently show up. Also
subscribe to the FT-817 list on groups.yahoo.com as they are often listed. And
a search of the archives will give you information on how (and whom) to contact
at the factory.
Yet I concur with the majority, the KPA-100 is a nicer solution, and coupled
with the KAT-100 it makes for a very sweet radio. My configuration is a K-2
with all the trimmings in QRP mode, and a KPA-100/KAT-100 in an EC-2 enclosure.
It affords the best of both worlds, unplug it and it is the best QRP radio of
all time, and bring it back in and you have a very good 100 watt radio.
If only the firmware could determine when it was connected to the KPA-100/KAT-100 or
not and return control to the KAT-2. (Sorry Wayne <g>.)
I dont think the KPA-100 is more expensive than a Tokyo amp either.
73,
Joe N9JR
----- Original Message ----
From: Doug Person <[EMAIL PROTECTED]>
To: Fred (FL) <[EMAIL PROTECTED]>
Cc: elecraft@mailman.qth.net
Sent: Thursday, December 7, 2006 4:36:15 PM
Subject: Re: [Elecraft] Barebone K2 Amplifier?
Long ago Ten-Tec made a model 405 amplifier. It could take 5 watts in
and produce 50 watts out. There are also some Tokyo Highpower amps
around that people have bought directly from Japan. You could also
arrange to buy one directly from the company. They technically aren't
legal because the FCC has restrictions on input power, bands and gain to
(unsuccessfully) prevent CB operators from running more than 4 watts
output. Otherwise, there are plans and boards to build a 140 watt amp
that would be quite suitable. I also believe it is possible to make the
KPA100 an external amplifier. I've used a number of these and in my
book if you want 100 watts - buy the KPA100. I built one of the first
and it was a gem.
73, Doug -- KØDXV
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