[R-390] Fixing a R-390A module connector

[Larry H]

Dave, Great work on the connector pin.

BTW, pictures are allowed, just attach them to the post (note).

Regards, Larry

On Fri, Oct 18, 2019 at 12:10 PM David Olean <k1whs at metrocast.net> wrote:

> I just got started on restoring a 1967 EAC R-390A receiver. It looks
> pretty clean, with just a bit of schmutz on the chassis. I looked it
> over and saw that two slug racks did not move. That was easy. I found a
> gear that was not tightened with its' clamp. A more troubling problem
> was the big multi pin receptacle on the IF module. One of the exposed
> pins had been bent over and flattened against the chassis! I tied to
> unbend it, but it fell apart as soon as I touched it.  I changed out the
> problem caps in the IF assy with new modern capacitors, but was worried
> that I now had a bad connector to deal with.  Here is what I did.
>
> I filed down what was left of the broken pin to get a flat surface.
> Next I gently tried to prick punch the flat brass so I could start a
> small drill bit. I ended up using a #66 drill bit in a pin vise and
> slowly got a hole started in the flattened area. When I had enough depth
> to start a real drill, I bolted the IF assy down on my drill press and
> drilled a small 0.030" hole in the brass. (Maybe 0.100" deep) Next, I
> opened it up with a #60 drill bit to 0.040" which is the diameter of the
> pins required.  I turned down a new 0.040" pin out of HH brass on the
> lathe and adjusted the length so that it fit in the new hole properly
> and extended as far as the existing pins.  A bit of flux and some solder
> to hold it in place and the busted connector now looks just like a
> perfectly good one!  Hoo-Boy... shades of McGyver!!  Now on to the next
> problem!
>
> I took some pictures, but I don't think pictures are allowed on this
> reflector.
>
> Dave K1WHS
>
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