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
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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