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repair
I have noticed many posts saying shorted neon transformers could be revived
by removing the tar which has carbon tracks from an arc.
I have 4 bad neons I would like to try and bring back to life. Before I try
this I have some questions.
How are the high voltage insulators attached to the secondary coil? Is there
any chance of breaking the wire connection to the windings?
Someone suggested putting the transformer in the freeze to make the tar
brittle. Then take a hammer and beat it to death to get the tar off. Whats
the chance of smashing the windings and permanently damangeing it beyond
repair? If the case is removed what holds the high voltage insulators in
place?
Someone suggested putting the transformer in a solvent for several weeks to
disolve the tar. Kerosene or paint thinner will probably work. What type of
solvents will work? What type of solvents will not work? I know Acetone
will remove everything except the metal and leave only bare uninsulated wire.
Will the solvent soak into the primary and secondary windings and cause any
problems? Has anyone tried this? How long did it take? What solvent did
you use?
I have been told that tar melts at about 400 degrees F. The local motor
rewind shop told me they cure the new motor windings in an oven at about 500
degrees F for several hours. Transformers that have to be cured are cured in
an oven also. It should be possible to heat a transformer in an oven and melt
off the tar. Has anyone tried this?
Could most of the tar could be removed in an oven. Then the rest disolved
with a solvent. What do you think?
If I can't fix it, I can fix it so it can't be fixed.
Gary Weaver