[R-390] Mechanical filter substitute

[Robert Nickels]

On Dec 18, 2007 9:14 AM, Bob Camp <ham at cq.nu> wrote:

 > Before you go to crazy - sling a 10K ohm resistor between input and
 > output directly on the filter.

Good tip, Bob.   And it reminded me - at the Belevidere IL hamfest I saw 
a Collins 75A series receiver that had a homebrew "filter replacement" 
in it.  This was a small perf-board with a couple of chokes and 
capacitors which would obviously be for wideband AM but I thought it 
would be neat to give it a try.   Of course I forgot to go back and 
sketch the circuit!   Wonder if anyone knows about this and has the 
design details?

73, Bob W9RAN