[R-390] Current thoughts on washing

[Jbrannig at verizon.net]

I remove all tubes, meters, PTO's......and tape over the openings on IF 
transformers
With a 50% diluted solution of Simple Green, use various artists brushes to 
clean the nooks and crannies.
This is followed with a distilled water rinse and compressed air to clear 
the rinse.

I use the sun dry method, but the box and lamp is a good idea....

Jim

-----Original Message----- 
From: Bill Hawkins
Sent: Tuesday, October 15, 2013 10:07 PM
To: R-390 at mailman.qth.net
Subject: Re: [R-390] Current thoughts on washing

If you don't live in Texas, a drying oven can be made from a
cardboard box and a 60 or 100 watt light bulb. A circulating
fan would be good, but the box has to be closed.

Use whatever air source you can, even canned "air" to get any
water that has wicked into socket pins or other tight places.
It isn't going to boil out, and evaporation takes a while.

Rinse it enough to remove any electrolytes from the cleaner
that could leave conductive paths. You may need a final rinse
with distilled water.

I didn't see Simple Green listed as a cleaner, but that worked
for me ten years ago.

Remember that the markings on tubes will dissolve in water,
because counterfeiters used to re-use tube envelopes. The
tubes should be removed anyway to get water out of the sockets.

Hope that's useful.

Bill Hawkins


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