[Amps] 160 meter tuned circuit

R.Measures r at somis.org
Wed Mar 17 08:04:38 EST 2004


•  Larry --  If you convert the 4-1000A to grid-driven, AB1, no tuned 
input is needed for 160m, or for 80m and 40m operation.  The needed 
screen supply can be derived off of the anode supply bleeder-R and a 
zener-string.  However, power-out will be c. .1/7 of a S-unit less in 
grid-driven than in g-g. 

>Hi guys, I recently recieved a home brew 4-1000a amplifier. Amp is tapped 
>for 160 only and running just 1 tube. High voltage is near 5000. This amp 
>has no tuned input circuit and Im not a very good builder. Does anyone 
>have a schematic or know where I can get a tuned circuit for this one band 
>amp? My Yaesu tunes to abt 1.6 swr on auto tuner and antenna standing wave 
>is less than 1.5.   
>
>I have read enough here to know thats there is some sharp fellows on the 
>list.
>
>thanks Larry WB9F
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