[SixClub] Looking: 4-65A Amplifier Circuits...

[Sixmeterclub at aol.com]

In a message dated 1/15/2006 3:54:39 PM US Eastern Standard Time,  
50MHz at rogerhalstead.com writes:

Either  Motorola or GE had a VHF amp that used a pair of 4-125s, or 4-65s. 
You  might find an old repeater with one of these still in tact for little of 
 
nothing. At any rate the schematics should be available

Roger  Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest  Debonair CD-2
www.rogerhalstead.com



The GE amp was biased for class "C" with a pair 4-125s and 4-65s would work  
with proper voltages, The amp I am thinking of had a 2E26 driving a 4-65 with 
a  pair of 807s modulating the 4-65. Not the best plan but made a fair AM 
signal.  Some used a 4-125 in place of the 4-65.
 
You might also look into the Quintron paging transmitter using a 4-400, the  
one for 48 MHz will tune 6 meters and the powersupply and was designed for  
650W full duty. You just need to bias the Final for SSB.I have seen then  sell 
for a little as $150 complete.
 
If I find the article I will scan it and send it to  NØLRF