------------ ORIGINAL MESSAGE ------------(may be snipped)
On Thu, 20 Oct 2016 01:17:54 +0000 (UTC), you wrote:
>k I have read somewhere about adding a coil between the blocking cap and C1
>but I can't find anything about that now and I don't really remember the
>specifics. Any help would be appreciated.Thanks & 73KK4RSV
> Darrell Wyatt
REPLY:
This is discussed in the amplifiers section of any recent ARRL
handbook. Basically, the small coil forms an "L" network using the
tube's own output capacitance to step down the plate impedance to a
value which can be tuned with a reasonable sized tuning cap. The coil
is effective only on the higher frequencies and "disappears" on the
lower ones..
It works great. I have used the method on several amplifiers including
six meters.
73, Bill W6WRT
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|