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Old 22nd Oct 2020, 5:51 pm   #46
mrrstrat
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Join Date: Jul 2020
Location: Rockford, Illinois, USA.
Posts: 159
Default Re: Hallicrafters SX-43 2nd I.F. won't peak

Close-up of what looks like the tuning (phase control) of my SX-25 crystal. I plan to align it today and do not relish breaking how well it appears to be working. I will briefly visit the IF tuning but BFO and selectivity are sharp and responsive.

Quote:
Originally Posted by Radio Wrangler View Post

This makes it sound like there is really only one 'correct' position of the phasing control... well, yes, but. In real world use with congested CW signals, the distortion of the passband that off-tuning the phasing control gives can be rather useful. However, you have to remember that this comes at the price of throttling back he skirt selectivity at the other side and throttling back the ultimate skirt selectivity om both sides.



David
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