[GreenKeys] Rixon relay

[Jim Haynes]

When I worked at Teletype in the summer of 1958 one of the little projects
I was handed was a solid state replacement for the polar relay.  My boss
and I both came up with the idea of a low-voltage selector magnet and
solid state driver as was later done in models 32, 33 and 35 and later.

I remember we had some company's sample of a solid state polar relay in
a 255A can, but I don't remember the name of the company.  I remember it
had two transistors in series to handle the 120V loop.

I had a somewhat larger concept of using low voltage inside a complete
set, keeping the high voltage loop outside.  This I failed to sell, so
the internal wiring of sets remained complicated by having loops that
had to be kept closed.

And we were concentrating on the problem of driving the selector magnet, 
when the more difficult problem was on the line side of the relay, where 
it had to accomodate neutral or polar or some of the other zoo of circuits 
that were in use for TTY transmission in those days.

Jim W6JVE

 	---

 	"Ya can argue all ya wanna, but it's dif'rent than it was."
 	"No it ain't! No it ain't!  But ya gotta know the territory."
 		Meredith Willson, The Music Man