Hi, Everybody,

Would anybody know offhand which rigs from maybe the 1960s through early
1980s era had an IF of 10.9 MHz? I have a number of 10.9 MHz crystal filters
built by Network Sciences (C-F Networks) that I bought some time ago that
were supposedly taken out of a ham rig and just out of curiosity wanted to
know which one.

Thanks very much.

Regards,

Al W6LX