Re: #ubitx-help Strong Audio Tones in and outside audio receive passband #ubitx-help

John Backo

I substituted 11.092 MHz for 10 MHz in a build of the BITX v.3.

It decoded both 40m and 20m very well, just by changing the
BFO from LO to HI. And the VFO had to be spread out a bit.
Of course, 40m tuned in reverse, but it works..

I figured out that the best IF would be ~10.5 MHz as this gives nearly
a symmetric VFO/BFO mirror (in the spirit of the 9 MHz 20/80m classic rig).
But such crystals are unobtanium. Hi.


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