[R-390] R-390 AProduct Detector

[Richard]

I picked up an HP312A Selective Level Voltmeter for $50.  The old model
doesn't seem to be as popular as the HP3586C for VLF work.  I have one of
each.   What is nice is that it will do a great job as a SSB detector
(AM/USB/LSB) plus you can adjust it +/- of 455.    The A model has Nixie
disply and weighs almost as much as the radio.  Does need an external
speaker and amp.
 
73 de Richard, W5SRB