Hi Bob,
That will only work if you do FSK.
None of the mentioned amps is really suitable for class C operation.
You probably will have not enough drive in GG class C and the output and
input circuits plus bias have to be redesigned.
If you have more then 100W of drive its worth to think about it.
What you should use is a tetrode or pentode, a 4CX1500A or 5CX1500A would be
a good choice.
Efficiency of 78% is to be expected.
73
Peter
-----Original Message-----
From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
Behalf Of Robert Chudek - KØRC
Sent: Donnerstag, 2. November 2006 20:21
To: amps@contesting.com
Subject: [Amps] Class C amp for RTTY contesting...
I enjoy RTTY contesting and would consider building (or converting) and
amplifier dedicated to that mode. I read on this reflector a while back that
a Class C amplifier could be used with the advantage of higher amplifier
efficiency.
I have a few questions about this idea:
What would be needed to convert a "traditional" linear (AL-1200, AL-1500,
L-4B, TL-922, etc) to strictly Class C operation?
Is there a specific tube (or tube series) that would be more efficient when
run in this class?
What efficiency could be expected?
Does Class C provide more/less gain (drive power) to obtain 1500 Watts
output?
TIA for the education!
73 de Bob - KØRC in MN
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