[Elecraft] APF For K3

[Brian Alsop]

My guess is that Q-multiplier was in the IF.
The old HeathKit QF-1s were at 455KHz.

For best functionality (and maximum difficulty?) this peaking function 
would work best withing the AGC loop at IF.

At AF, it won't do a lot of good if you have another nearby, within pass 
band signal pumping the AGC.

73 de Brian/K3KO
On 10/24/2010 19:38, Lou Kolb wrote:
> kinda reminds me of the q multiplier I had on the old Drake 2B.  That thing
> was unbelievable at bringing cw signals out of the soup.  Lou WA3MIX
> ----- Original Message -----
>


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