A quick pic of the few mods I have done to this radio, two diode switched filters, these are? selected via the existing mode switch, SSB/CW? and AM /ANL positions select the narrow, and wide respectively.
As I have previously mentioned, the existing BFO is NOT adequate to service a narrow filter, its long term instability will eventually move it out of the passband, ceramic resonators will do the job, and can be "pulled" to sit on the filter skirts properly.
Other mods done include AGC fast/slow, AGC also applied to the first IF amplifier, and others that escape me at the moment.
But, everyone loves pictures........
