[Milsurplus] Micamold Recovery- Aging Test

David Stinson arc5 at ix.netcom.com
Mon Jul 28 22:55:58 EDT 2014


Some have been following this test of the possibility of
recovering NOS "leaky" Micamold caps to some level of service.

Summary-
20 NOS "leaky" Micamold caps were baked at a temperature
above the boiling point of water (250-300 degs F) for 1.5 hours.
They were allowed to cool for 2 hours.  There was some minor
oil leakage from some caps.  Some had minor "steam bulges."
19 of the caps now tested "good" on my ZM-11 bridge.
The caps were coated in plain white candle wax and placed
in a high-temp, very high humidity environment for 3 days.
One failed due to a defective wax coat, the remaining 18
testing "good."    The remaining caps were connected in parallel,
the group then placed in series with 170 VAC PTP and a lamp
for several days.  None failed.  The caps were then left to "age"
in a hot Texas barn for a month and retested.  None failed.
I have marked the 18 remaining caps with a daub of paint
and added them to my inventory.

I will now process a much larger batch, agitating the wax
this time for better coverage, and test them.
I'll let you know.

73 DE Dave AB5S




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