Sounds like a generic pre SS exciters amp that may have been any magazine or
HB and modified by the builder. Those same sources will also have info on
the other bands in the years since we got 1500W on 160.
You can even buy all/some of the components from Ameritron or copy the
circuit from hamfest and Fleabay finds.
Use Ians software for tank circuit values, it doesnt get any easier.
http://www.ifwtech.co.uk/g3sek/
Carl
KM1H
----- Original Message -----
From: "Mark Beckwith" <r-emails@n5ot.com>
To: <amps@contesting.com>
Sent: Wednesday, March 20, 2013 12:33 PM
Subject: [Amps] Anyone recognize this amp / circuit?
I have acquired a homebrew amp as follows:
It has two 4-400s in parallel in grounded grid (with a hole for a third
one, FWIW). The bandswitch has positions 80-40-20-15. It has TWO 30A
Filament transformers with 110V primaries wired in series with the outputs
in parallel. Input is not tuned.
HV power supply is separate, outboard.
This seems like something I might have seen in an old handbook? Does it
ring a bell for anyone in this group?
Fun project. Any conjecture about how I would fare adding 160, 15 and 10
meters?
Thanks in advance for any posts in response.
73 - Mark, N5OT
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