[Collins] 75A-4 Schematic, metal Filler plate and Filter Choke Needed

[Roger Shultz]

I'm in the midst of restoring a 75A-4 SN 1938 that has the Collins 136C-1
noise blanker. I'm pulling the noise blanker for now and restoring the radio
to the original noise limiter circuitry.  I was doing pretty well until I
found that I have a schematic that shows SB#2 modifications which began with
SN 2716. As a result I can't be sure I'm reconnecting everything correctly.
My schematic shows a R66 47K joining R65 220K but I can't find that and
assume it was installed up at the noise limiter pot on the front panel. Does
anyone have an older schematic available either electronically or on paper
that will help me sort this out? I really only need the section around the
6AL5 V-12 noise limiter.

In addition, I need the metal filler plate normally occupying the space to
the rear of the PTO and most of all I need L-30, the 5 mh filter choke.

All help is appreciated, thanks in advance to all and 73, Roger NJ2R