Hello,
Have a NEW in the O.E.M. Box, Icom FL-33 9.010 Mhz AM Filter, (7.5Khz-6db).
According to research, It should work in the following radios.
IC-730
IC-740
IC-745
IC-751 / 751A
R-70 / R-71 / R-71A And More.
Asking $65.00 + small Shipping from 60185.
Contact Don @ dwondolkowski@hotmail.com
Thanks for looking, Don W9DMW
Think they will also fit the 781. My 765 had one. If the IF in am mode is the same frequency as for the 730 to 781 rigs, you could just wire this guy in and get great selectivity. Wonderfull filter. Great price too, for something hard to find.