[R-390] Transformer Failure

[Steve Hobensack]

I've had two transformer failures. In both cases, it was the tar potting at the high tension terminals. The fix was straight forward. Pry off
the bottom plate with a sturdy knife by tapping knife along the solder seam using a hammer.  Apply a heat gun and scrape away the tar
near the terminals. Install insulated wire through the porcelain feed-through tubes.
Steve N8YE