|[AMRadio] 1930's Old Buzzard Open Rack Transmitter Finally Sees
John E. Coleman (ARS WA5BXO)
wa5bxo2005 at pctechref.com
Tue Feb 21 21:33:43 EST 2006
CONGRADULATIONS A JOB WELL DONE!
I really like the choice of tubes. I don't know what a T55 is but
probably one of the special Taylor triodes with 55 watts plate dissipation.
Probably not a lot different than the 812s but I know that the 812s are very
good tubes to use in a class C plate modulated rig especially if used with
100% grid leak bias or the configuration that Don, K4KYV, uses where there
is a safety bias supplied thru a diode and the diode becomes reversed biased
when RF drive causes grid leak bias. The 100% Grid leak bias DOES make a
difference in the modulation characteristics of the rig.
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of ne1s
Sent: Tuesday, February 21, 2006 2:27 PM
To: AM Radio Reflector; glowbugs at piobaire.mines.uidaho.edu;
antiquewirelessassociation at yahoogroups.com
Subject: [AMRadio] 1930's Old Buzzard Open Rack Transmitter Finally Sees
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