[Elecraft] K2 filters charactoristics

[Bill Tippett]

AC7AC wrote:
 >But, if you centered the 700 beat frequency in a 2,000 Hz filter bandpass,
the passband would go from a high frequency of 1700 Hz on the high end, and
then you'd go clear through zero beat to 700 Hz on the wrong sideband!  That
is, a 700 Hz signal would appear twice on your tuning - 700 Hz on either
side of zero beat!

         Right idea but wrong numbers.  The 6 dB passband would go from 
1700 Hz on
the high end to 300 Hz on the other sideband (1700 - 2000 = -300).  But you
would probably still hear 700 Hz on the wrong sideband because the K2's
filter shape factor is fairly broad.

                                         73,  Bill  W4ZV