...I used a ... shirt pocket AM receiver to find the offending transformer.


Thansformers themselves VERY, VERY, VERY rarely make noise.
Insulators, connections and other connecting hardware are the cause.

Mchenry / McCollum Lake

Poles.

I'm actually in Wonder Lake. It's a Wonder it's still a Lake because
no one wants to have it dredged (but they surely want the "lake").

73, Steve, K9DCI atarrl point net