[ARC5] [Milsurplus] SCR-522 Project: Three Down, Two to Go.

[Mike Bracey]

Hi Dave,
I'm always interested in your projects. However, your video is so dark, I can't see anything.
MikeKE5YTV

      From: David Stinson <arc5 at ix.netcom.com>
 To: ARC-5 <arc5 at mailman.qth.net>; milsurplus at mailman.qth.net 
 Sent: Thursday, July 5, 2018 8:01 AM
 Subject: [Milsurplus] SCR-522 Project: Three Down, Two to Go.
   
(Not writing great details on this project because
I don't think one other person on the planet is
going to take this one on.  Just posting status
for interested friends).

Replacing caps and Hi-Z resistors in the Front End
of the SCR-522 BC-624 receiver was challenging.
Slow and steady, with lots of photos and drawings
to get the thing back together.  15 minutes here,
an hour there- took a few days, but patience was
rewarded ;-)
Listening to Dallas/Fort Worth Approach on 119.4
MC:
https://photos.app.goo.gl/Mrx6gVpT3aEYbGDt7

Interesting:  The front end of the BC-624 RX is
loaded with 680 pFd bypass caps.  Tested all of
those replaced using a ZM-11 bridge and found them
all reading "good."  Nevertheless, the receiver
plays now.  Of course, a lot of resistors were
"off the reservation," but not by more than about
30% at worst. Probably not enough to make 15 dBm
worth of difference.
 
1.  Dynamotor Supply (check).
2.  Mounting rack/electromechanicals (check).
3.  BC-624 Receiver Revival (check).
4.  BC-625 Transmitter Revival (next).
5.  System re-integration.

GL OM ES 73 DE Dave AB5S

"Telling the truth won't get you many friends.
 But it will get you the right ones."
                John Lennon


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