[TCML] TAR

[Ed Phillips <evp@xxxxxxxxxxx>]

   Does anyone know where to get the type of black "tar" used to pot 
transformers?  Does anyone know the actual temperature at which it's 
poured into the transformers?  Did a web search but got nowhere and 
suspect that roofing tar or pitch probably isn't suitable.  I want to 
pot a couple of GMHEI transformers in a cylinder to simulate the 
secondary of a "spark coil" and don't want to mess with oil or the 
like.  Paraffin wax doesn't work, at least for me, because of too many 
bubbles - I've tried pretty hard to get rid of them [with the exception 
of vacuum] without much luck.

Ed

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla