[GreenKeys] model 28 KSR

[Virgil Bierschwale]

I've been studying the schematics for this model 28 I received last year
and if I understand them correctly, it looks like I want to hook up the
loop supply to pin's 21 and 22.
Looking at the wire colors, they are in fact a red wire and a black wire
and nothing is hooked to them.

I have attached a picture of it.

can anybody verify that as I don't want to screw anything up.

Thanks,

Virgil
N5IVV
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