[Amps] Using automatic tuner for Amp input
Fuqua, Bill L
wlfuqu00 at uky.edu
Sat Aug 28 11:15:30 PDT 2010
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.
From: amps-bounces at contesting.com [amps-bounces at contesting.com] On Behalf Of jeff millar [jeff at wa1hco.net]
Sent: Saturday, August 28, 2010 11:31 AM
To: Amps at 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.
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