[AMRadio] 1930's Old Buzzard Open Rack Transmitter Finally


Brett gazdzinski brett.gazdzinski at verizonbusiness.com
Tue Feb 21 22:07:23 EST 2006


That is what I did with the bias, plus I put a bi pot on the 
control deck so I can change the grid leak resistance.
The bias voltage meter is usually pinned, that's above 
150 volts someplace...

Brett
N2DTS 

> -----Original Message-----
> From: amradio-bounces at mailman.qth.net 
> [mailto:amradio-bounces at mailman.qth.net] On Behalf Of John E. 
> Coleman (ARS WA5BXO)
> Sent: Tuesday, February 21, 2006 9:34 PM
> To: 'Discussion of AM Radio'
> Subject: RE: [AMRadio] 1930's Old Buzzard Open Rack 
> Transmitter Finally SeestheAirwaves! (Long)
> 
> 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.
> John, WA5BXO
> 
> -----Original Message-----
> 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
> theAirwaves! (Long)
> 
> 
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