[ARC5] AN/ARC-2A Meter Fixed.

[jeepp]

Dave,Mine was doing somilar thing, but it didn't come back on its own.  I had to key the mic, just once, and it would pop back on.  Thankfully,  all the relay contacts are in the clear and within reach of the burnishing tool.Jeep K3HVG


Sent from my Verizon 4G LTE smartphone

-------- Original message --------
From: David Stinson <arc5 at ix.netcom.com> 
Date: 5/6/18  17:32  (GMT-05:00) 
To: ARC-5 <arc5 at mailman.qth.net>, milsurplus at mailman.qth.net 
Subject: [ARC5] AN/ARC-2A Meter Fixed. 

Here's the ARC-2A I'm hoping to offer sometime
soon.  I get 15 minutes here and there to work on
it, so one of these days, I guess.  Sorry for the
lousy pic, but when the list is limited to 30K
photos, low-rez is about it.  I got the meter
fixed.  The problem was the front spiral "clock
spring" was, for some reason, up against the
forward movement mounting frame.  I just blew on
the movement and the spring snapped back in the
proper place.  Lubed it, cleaned the case (careful
not to put pressure on the glass or it will come
out).  Seems to be OK now.

Got a problem I'm hoping someone has seen:  When I
key the set in AM mode, then release the PTT, the
receive level is low, like it was not muted and
the TX signal has railed the AVC voltage.  It
starts to come back up, but after a couple of
seconds, it pops back to normal, for all the world
like a sticking TR relay letting go.  

There's also a leak of low B+ somewhere, indicated
by static noises.  That may be moisture related.
Going to pull the dynamotor (must be out of my
mind!) and leave it with the filaments running for
a couple of days to dry out any moisture.  Then
use an external low B+ source to determine if the
leak is in the dynamotor (happens) or in the set.
A single, leaky cap can do it.  We'll see.  

Here's a video of it receiving WWCR on 4840:
https://photos.app.goo.gl/Yiz7yARb0VbBEVCe2

Hope I'll get to work on it again soon.  We'll
see.

73 Dave S.


______________________________________________________________
ARC5 mailing list
Home: http://mailman.qth.net/mailman/listinfo/arc5
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:ARC5 at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20180506/ef26d177/attachment.html>