> I have tried to research an ICOM FL-30 from the various sites on the > net, however have come up with nothing Paul, It is listed as a "passband SSB filter" in the 1982 AES catalog as an accessory for the 730 transceiver, $59.59. As a comparison, in the same catalog the FL-44 SSB filter (455 KHz) is on sale for $144, so it doesn't look like the FL-30 is a particularly high performance filter. 73, Rick K2XT