To obtain quality AM from a modern radio and a linear amplifier,
first tune the amplifier up at 100% of max pep. I prefer to do this
with a CW keyer sending 50wpm dits or with a tuning pulser. Next,
switch to AM mode and adjust the carrier control for 25% of max pep.
Speak into the mic and adjust the mic gain to the point that 100% of
max pep is obtained. Mo' mic gain is not mo' betta. Also, there
should be virtually no change in the linear amp's anode current during
modulation.
-- Additional comments -- To reduce Rx noise, I listen to AM with the
SSB product detector, back off the RF gain, and select the sideband
with the least interference. By doing this, it allows one to operate
comfortably in an AM-VOX situation.
cheers, Roger
On Jul 6, 2004, at 3:13 PM, Roger Agnew wrote:
I would like to get on an AM Net tomorrow with my Icom 756 Pro driving
my Collins 30S-1 or 30L-1. Does anyone know or could guide me to a
source of information to properly drive these amps with the Icom 756
Pro.
Roger Agnew
K1KQ - Austin, TX
888-536-5500
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Richard L. Measures, AG6K, 805.386.3734. www.somis.org
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