[GreenKeys] Are there any telephone switchers in the group?

[Harold Hallikainen]

On Sat, February 15, 2025 7:59 pm, Brenda Gentry via GreenKeys wrote:
> Are there any greenkeyers who also take interest in telephone central
> office switching?
>
>    B. Gentry   KA2IVY

When in high school, I was given a bunch of step equipment donated to my
school by Pacific Telephone. A friend and I built a small step office in
my garage. I still remember the dual coil A relay that would detect off
hook and dial pulses. The B relay, which was slow release, would separate
on hook from dial pulses. I did simple two digit dialing (like the
connector in a switch office as opposed to a selector). I also did not use
a line finder. Instead, each phone had its own connector for dialing out.
I ran wires through trees all over the neighborhood.

More recently, I did mantenance on the demo step switch for the Telecom
History Group in Denver and wrote the documentation on it.

It's amazing what they did with relays!

Harold
https://w6iwi.org




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