[GreenKeys] 28 ASR selector magnet input

[O. Warren]

Hi again, list..

About the connections to a 28's selector magnets.

In contrast to a 33/32 printer which used a Selector magnet driver card, the
selector magnets of a 28/35 were 60 ma coils.  As I remember, and it's been
over 12 years since I've seen these machines, there were 2 or 3 terminal
strips at the back of the mounting area of the printer.

Looking it from the back, the 1st and 3rd terminals from the left end were
the connections to the magnets.  IF you have an accessory cabinet model,
with it's own loop supply, then there would be a Polar Relay that would
"key" or feed the loop supply.  In these circumstances the 1/4 inch jack
should be labeled.

If I'm wrong about this, my apologies, as it's been over 12 years since I've
seen these machines, and I'm going on memory.

Best,

O. Dick Warren, W7TIO
Western Union, retired
ocwarren@burgoyne.com