ORIGINAL MESSAGE:
On Mon, 06 Sep 2010 12:31:47 -0400, mikflathead@aol.com wrote:
>
>
> Does it make any difference if I ground the shaft side or the other side of a
> variable vacuum cap? Mike
REPLY:
Grounding the non-shaft side will add some stray capacitance from the
shaft side to ground. On the higher frequencies, this may be too much.
A good example is ten meters. Most amplifiers have trouble enough
getting a reasonalbe Q on ten because of accumulated stray
capacitance. Adding more by grounding the non-shaft side of the tune
cap just makes it even more difficult.
73, Bill W6WRT
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|