[R-390] Pete Wokoun's schematics from Y2K R3 Tech Ref

[Larry H]

I have thought about having printed schematics that were designed for
regular letter size paper without foldouts for years, but I just kept on
using with the ones that folded out that came in the book I got with my
first R-390A back in 1991.  They were not organized very well for this size
paper, but were ok.  However, after seeing the nice quality schematics that
Nick just scanned, I decided to find or make some good ones for
letter paper that were not foldouts.

I have known about the ones in the Y2K R3 Tech Ref for a very long time,
but the printing was too small, there were a lot of typo  errors and the IF
unit was put all on one page (this made it way to compact and
disorganized for me), it should be on three pages (as the RF unit is).  In
this condition, it was not worth it to me to print them out.  But, I
decided to use them as a basis for what I'd like to see.

Pete did a very nice job of redrawing the schematics for the R-390A so they
would fit onto 8.5" x 11" paper for the Y2K R3 Tech Ref (and for the
most part, were nicely organized into logical units).  I used all of Pete's
schematics as a starting point except for the IF unit.  I corrected all the
many typos, and enlarged the schematic diagrams so they take up the whole
page (thus enlarging the  lettering to a point where it's barely large
enough for easy reading).

For the IF unit, I used the IF schematic from Nick's doc that I updated and
divided it into three logical segments, one per page.

They are on our website in the 'reference' section just below the Y2K tech
ref and you can see them here:
R390A Y2K R3 schematics upd ljh.pdf (r-390a.net)
<https://www.r-390a.net/R390A%20Y2K%20R3%20schematics%20upd%20ljh.pdf>.  To
make them easily viewable online, I rotated them, so if you print them,
remember to print them in landscape mode.

Regards, Larry