You can make it work as long as you shunt the input of the amplifier with a
capacitor with a reactance of 1/4 or less of the input impedance. This will
provide the charge storage needed to smooth out the sinusoidal wave from and
the antenna tuner will still match the impedance. I prefer a Q of 10 or better
myself but if you chose 1/4 for 80 meters you will have a Q of 4 on 80 meters
and on 10 meters it will be 32 with out switching capacitors.
73
Bill wa4lav
________________________________________
From: amps-bounces@contesting.com [amps-bounces@contesting.com] On Behalf Of
jeff millar [jeff@wa1hco.net]
Sent: Saturday, August 28, 2010 11:31 AM
To: Amps@contesting.com
Subject: [Amps] Using automatic tuner for Amp input
What do people think of the amplifier by Bill W4NFR shown in the latest QEX? It
uses an LDG tuner on the amplifier input instead of a set of filter/matching
networks for each band. It seems like an innovative design.
jeff, wa1hco
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