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Folks,
Has anyone installed a Sherwood or other 600Hz
first i-f filter in the R4, R-4A or R-4B? (In the R-4C it's well
documented but matching is different with the earlier receivers.)
Or, does anyone know of a link or source that has
info for the earlier R-series receivers?
Thanks,
Bob W1XT
Surprise, AZ
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