Re: Crystal CW filter with Version 4 uBITX boards? #ubitx

ajparent1/KB1GMX <kb1gmx@...>

Did you change the 2nd lo to convert the 45mhz signal to  the new IF??

The Existing IF is 11.995mhz (more or less).  Why are you messing with 4.6, 6.2, 8 and other frequencies?

Likely the filter part has a chance but everything else is plain wrong.

I have limited use for CW but making a filter using matched (within less than 50HZ) crystals at 12mhz
isn't that magic and narrow filters are easier.  However the end termination will NOT be 200ohms
and likely lower maybe 50 ohms which is also OK.  Are you switching the existing filter out or what?


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