Re: K1 Bandwidth Question
Posted by
Rick Dettinger-2 on
Mar 12, 2007; 2:57am
URL: http://elecraft.85.s1.nabble.com/K1-Bandwidth-Question-tp444720p444722.html
> It wouldn't seem to provide much advantage. The bandwidth of the
four-pole crystal IF filter may be adjusted in three steps from about 200 to
850 kHz. The selectivity as designed is outstanding.
>
> Mike / KK5F
> K1 #175 since 11/2000
====================================
I usually use an outboard audio filter when operating at home. I agree
that it is not needed for selectivity but it makes the sidetone sound like
my K2 and I enjoy a clean CW note. I think one problem with a simple low
pass filter is that the K1 has a wide range of possible sidetone pitch and a
cutoff frequency that would help someone who uses a low pitch as I do would
not pass a high one. Thus, filters would need to be adjustable or custom
designed for the desired pitch.
Rick Dettinger
K7MW
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