[R-390] R-390A BFO Neutralization Adjustment

[Larry Haney]

A few years ago I wrote a document about an easier way to do
this adjustment than what's documented in the tech refs.  Well, I just
found an even easier way to do it and updated my document with it.  All
that is required is a VTVM.  Here's a link to it on our website:
R390A-BFO-Neut-Improved.pdf
<https://www.r-390a.net/R390A-BFO-Neut-Improved.pdf>.  This procedure
should work on all 390s.

Regards, Larry