Compare Collins to Murata ceramic filter
1968 Collins Mechanical Filter Catalog
Adding a mechanical Filter to the FT-817
Installation of mechanical filters into a R-388/51J-3
Table of IF frequencies for commercial radios
Table of IF frequencies for Military Surplus radios
ANARC Association of North American Radio Clubs
IRCA International Radio Club of America
Sherwood Engineering - Synchronous Detector and filters
Copyright © 2003 John Kolb Last revised Dec. 7, 2003