The KM-60 had the sensitivity of the FM-100-B (1.8 uV IHFM) thanks to the Golden Cascode front end.

 It offered slightly better selectivity than the FM-50-B (60 db vs. 55 db) but not as good as the FM-100-B (65 db).

 Its capture ratio was the same as the FM-50-B (2.5 db), not as good as the FM-100-B’s 2.2 db capture ratio since the FM-100-B has an extra IF stage.

Yet the KM-60 was a bit of an oddball. Like the FM-50-B, it used an EM84 to indicate when an FM station was broadcasting in stereo (Fisher called it Stereo Beam).

 However, it also used a tuning meter which the FM-50-B lacked. The FM-100-B used a lamp to indicate when an FM station was broadcasting in stereo (which Fisher called Stereo Beacon), and a tuning meter.

The tuning meter of the KM-60 doubled as an alignment indicator to allow the kit builder to align the unit for proper operation.

Perfect Working condition.