[ARC5] Testing BC-442 Thermocouples

[Mark K3MSB]

I have a pair of BC-442 Relay Units on the bench and I’m trying to
determine if the internal thermocouples are working.

For general testing of RF Ammeters I use my Variac at 20V through a 20 ohm
series resistor.

I tried that for both Relay Units and I get no meter deflection.  I’m
tapping directly into the “B” side of the pickup transformer.

I’m suspecting the pickup transformer won’t work at 60 Hz.   I tested the
meter directly and it works.

Thoughts?   Other ideas how I can test the unit (aside from just putting in
the actual circuit, which I will after I clean up some cruddy relay bypass
“mods” in them….)

73 Mark K3MSB