[Amps] Re: 160M efficiency

[Phil Clements]

>     Yesterday I added 1600pf (4 doorknobs) to the base of the plate
> choke and noticed  a
> significant change in output as well as stability.   It seems the larger
> metal tubes
> require more bypassing  than found in some of the other designs.


All 160 meter amps need this, Lynn. It is just not as obvious at low power.
You need 8000-10000 pf at the base of the plate choke for 160, especially if you
are using a string of electrolytic capacitors in the HVPS. I use 10,000pf @ 10kv
disk ceramics by Sprague here.

(((73)))
Phil, K5PC