Uncle Peter wrote:

I'm surprised that it is that "wide." The selectivity curves are very
impressive;
and RCA put a lot of effort into the IF transformer design. I suspect
aligning
the IF and filter will be a bear to do.

To align the IF correctly - one needs a sweep generator. And yes - not
aligned correctly - they would imitate the nearest "barn door" for
bandwidth.

Best regards...
--
randy guttery

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