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Registered Member #2899
Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255
That is what I do with my MOTS! I heat them up, and then put them in a tail with pure paraffine wax. Paraffin wax is an excellent electrical insulator, with an electrical resistivity of between 10^13 and 10^17 ohm metre!
Registered Member #1643
Joined: Mon Aug 18 2008, 06:10PM
Location:
Posts: 1039
My MOTs have gotten hot to the point that when plastic touched their shells it melted and smoked. I spray painted them with engine enamel so, thats okay! Even mounted them to 1/2" plate of AL...
Registered Member #187
Joined: Thu Feb 16 2006, 02:54PM
Location: Central Ohio
Posts: 140
Why would anyone need to pot one of those in wax? It's not like you need to supress corona, the voltage is too low for that. It seems like it would just trap heat and cause it to build up.
Also, doesn't paraffin tend to pull away from the windings when it solidifies? It shrinks a great deal when it hardens.
Registered Member #2899
Joined: Wed Jun 02 2010, 06:31PM
Location: Deinze, Belgium
Posts: 255
Dr. Spark wrote ...
MOT’s are designed to start saturating at %60 power to protect the magnetron. This means heat will start to migrate out of MOT. Wax is going to melt with our heavy hands on the Variac indeed. The best way to keep the MOT cool is to place them in oil and also insulating from air if running them above their rated voltage in series. Have been running MOT’s (Series and parallel) hard for three years with no issue on Quadzilla.
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