[Milsurplus] Working on my ART-13's

[gl4d21a at juno.com]

I'll second David's comments from a slightly different point of view.  I was asked to rebuild a 1937 Aetna 3 band entertainment radio last summer.  In the process of troubleshooting odd symptoms, it became evident that ALL the ground screws needed retightening.  Even the ones which were just screws and nuts with lock washers were ever so slightly loose.  The screws apparently stretched slightly.  The spade lugs were just ...loose..  Loosening and retightening all the grounds made more improvement than all the other work I did.

Just for info, the tubes, 2 of which were original, were all OK.  All the paper and electrolytic capacitors were bad, bad, bad.  Most resistors were close enough.  Biggest problem was mechanical, a 5" disc of celluloid driving the tuning capacitor with a pinch drive had turned to dust, and a replacement had to be fabricated from some 5 mil Lexan.  Radio played amazingly well for 74 years old.

So tighten them grounds.  Tight!

HTH & 73,
George
W5VPQ
---------- Original Message ----------
From: "David Stinson" <arc5 at ix.netcom.com>
To: "'MRCA'" <mrca at mailman.qth.net>, <milsurplus at mailman.qth.net>, <ART-13_Transmitters at yahoogroups.com>
Subject: Re: [Milsurplus] Working on my ART-13's
Date: Tue, 14 Feb 2012 16:46:02 -0600

I've resurrected two ART-13s.
One thing I've found in them and other rigs:  Hi-Z grounds.
The screws that bind everything together get oxides between them 
and the muliti-part chassis.  Get a couple of screwdrivers and 
carefully tweek each and every screw that binds something to ground,
like at the tube sockets and chassis junctions.
A tiny turn or "loosen and re-tighten" is all that was needed.
It will make a difference.

73 Dave AB5S

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

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


____________________________________________________________
&#34;African Fruit Burns Fat&#34;
Learn How This Strange 62-Cent Exotic Fruit Is Making Americans Skinny
http://thirdpartyoffers.juno.com/TGL3131/4f3b1a2a112bb150a160st02duc