[Elecraft] CW Crystal Filter Signal Loss

[Vic Rosenthal]

Lemkes wrote:

 > That's over 10 dB loss of sensitivity as I narrow the filters which 
can easily lose a weak signal as I try to isolate it from nearby QRM.  I 
can't believe that such loss of performance is normal.

I don't think so.  One thing that could cause this is a problem with T7. 
  Check that it is wound on an FT37-43 core and has a 5:20 turns ratio.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco