[R-390] SSB-modified R390A

[jlap1939@yahoo.com]

Friends,

How may you be correct on frequency indication, if you
replace the normal use  Zero knob w/BFO vernier? The
BFO will still do better with any of several old mil.
zero methods, for SSB. BFO can vary quite a lot due to
hard to control factors, I always found..

Saw NO mil. variations for SSB during my time, But I
was not in the Sig Corps..However I saw a lot of these
units, and observed them closely, and learned the old
method for SSB reception from a few in Sig. Corps.
What I did see were TMC converters...

My Regards,  John    (JLAP)

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