[Boatanchors] [Milsurplus] Water, Water Everywhere.

[billriches]

Hi Dave,

I have had IF cans in R390a receivers and others with a similar problem.
Leakage between B+ pin and chassis.  Removing the xformer and you can see
the carbonized path.  I have cut out the bad part with a dremel and all that
is left is the pin.  Reinstall the if xformer hook up the connections to the
pin, making sure the pin is centered in the hole so it will not short.  Has
worked for me.

73,

Bill, WA2DVU
Cape May

-----Original Message-----
From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of
David Stinson
Sent: Friday, December 11, 2015 11:43 AM
To: milsurplus at mailman.qth.net; boatanchors at mailman.qth.net
Subject: [Milsurplus] Water, Water Everywhere.

Many of our beloved old radios have been sitting, cold and quiet for many
decades.  
Some of them getting close to a century.
Recently, I've been dealing with bakelite and phenolic in our sets which
have taken-up moisture over the years.  Right now on the bench I have a TCS
receiver in which one of the pins of Z202, an IF transformer, is leaking B+
to ground through the phenolic.  Pulling an IF from a TCS is a pain but
do-able.  
So may we discuss ways to gently drive moisture from our sets?  I can "get
rough" in the stove with those bakelite inserts in WWII radio connectors but
that won't do for a whole set.  I've tried powering just the filaments and
leaving a set for a couple of days but I don't think they get hot enough to
do much good.  Heat lamps can do some damage.
 What have you done?    I'm thinking of light bulbs
with the radio in a thick cardboard box, *outside* in case the box decides
to catch fire or something.

73 Dave AB5S


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