[Amps] Grounded B+ amplifier

DF3KV at aol.com DF3KV at aol.com
Fri Feb 27 08:20:45 EST 2004

Bill Turner <wrt at dslextreme.com> wrote:

>Years ago I recall reading about an amplifier where the B+ supply was
>grounded and the cathode was "hot" with the B- supply.  I'm wondering if
>that might have some advantages for high power amplifiers.
>Specifically, the pi-network output could be simplified by eliminating
>the plate choke.  

I do not think that is a good idea, you are just shifting the
problems and have to reevent the weel, where for conventional
layouts everything is known and optimized already.
If you have problems winding the anode choke, just transfer
it to the low impedance part of the pi-network, at the side of the L to the 50 ohms end.
Only the plate components have to be for higher voltage and
you need a high voltage variable at the output.
The coupling cap which moves between antenna and the output needs higher capacity of course


More information about the Amps mailing list