[GreenKeys] 18 volt Internal Loop Supply

[Jim Haynes]

On Fri, 8 Jul 2022, Tom Hunter wrote:

> That is why the 32 is polarity sensitive.
> 
And why it was smart of the designers of MITE to throw a bridge rectifier
in front of the thing to make it polarity insensitive.  What I still don't
understand is why the Bell Labs people designing the 101 Data Set chose
to have it drive the Teletype selector magnet driver with a current rather
than with a voltage.  And why Teletype didn't develop a selector magnet
driver with RS-232 input rather than current input.