Hi Dick,
The variable crystal filters in the K2 are very good. In fact the best I
have ever used. As Don says, unless you have a bad component, crystal
filtering should be excellent down to about 250 Hz, and the DSP down to 100
Hz before you get a bit of attenuation of signal. You can even
Has anyone thought of, or tried modifying the K2 Noise Blanker to be an
additional K2 IF amplifier stage?
My problem is that when I really, really need the crystal filter, I am
trying to copy a very weak (but readable) CW signal with adjacent S-9 QRM.
When I switch in tighter than about 1200
Dick,
Not an IF amplifier stage, but an added IF filter - check out
http://homepages.nildram.co.uk/%7Ebaker/K2_Overview.html to see if that
might address your stated needs.
If you have filter loss at bandwidths less than 1200 Hz, then I would
conclude that you have something wrong with your
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