[Hallicrafters] Repotting Transformers.

[Roger K8RI]

I may have mentioned this before, but in case I didn't:
A friend of mine fashioned a metal canister with a fitting on the top that 
would allow him to connect a vacuum cleaner.  He'd fill the container with 
enough "hot" transformer varnish so he could completely imerse the 
transformer without the thing running over.  The transformer, sans covers, 
was then lowered into the varnish, the cover placed on the canister, the 
vacuum cleaner hooked up and turned on.

I don't think he'd run the vacuum cleaner for more than a minute, then while 
the varnish was still hot he'd let the air back into the canister. That 
would force the varnish into small internal places that would never be 
reached by dipping alone.  It doesn't take a big vacuum system to do this.

Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com