[R-390] Opening The Power Transformer

[Steve Hobensack]

I have posted this message before, sorry. The power transformer can be easily opened by hammer tapping a putty knife through the solder seam. The failure of the winding will most likely occur where the high tension winding enters the small porcelain bushings as it exits the metal casing.  The tar potting material will carbon track to case ground here. The tar can be removed in this area with a heat gun and screwdriver. 
Steve N8YE