... I sure wouldn't transmit
with it, though. It's hugely wide, offering no attenuation of
unwanted mixer products.
If the filter is too wide, then poor 15 kHz image rejection, aliasing
and other unwanted things might happen in Rx. The DSP depends on
bandwidth limiting prior to digitizing, and the K3 system design places
that burden on the crystal roofing filter.
That said, congratulations on your ingenuity to do this!
73,
Lyle KK7P
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