super-strong magnets which my grandkids really enjoy. But I've also been
... without any high-tech equipment, how might those diodes be tested?

.... You'll probably have to do some simple
mechanical mods to the power transformers.


I'm aware of (and have done) the transformer mods, but what I'm asking
now is

"without any high-tech equipment (beyond the usual ham stuff such as
resistors, VOM, etc.) how might those diodes be tested?"
================================
--
--Myron A. Calhoun.
Five boxes preserve our freedoms: soap, ballot, witness, jury, and cartridge
PhD EE (retired). "Barbershop" tenor. CDL(PTXS). W0PBV. (785) 539-4448
NRA Life Member and Certified Instructor (Home Firearm Safety, Rifle, Pistol)