[GreenKeys] TTY loop jack boxes - eBay

[Steve Garrison]

You could also on tip and ring if you unplug one end of the cord and leave
the other in plugged into the circuit.  Same thing that can happen on a tip
and sleeve.

Steve G./N4TTY

-----Original Message-----
From: greenkeys-bounces at mailman.qth.net <greenkeys-bounces at mailman.qth.net>
On Behalf Of Harold Hallikainen
Sent: Sunday, August 8, 2021 2:47 PM
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] TTY loop jack boxes - eBay

I really don't like the use of tip/sleeve connectors for this purpose. You
could end up with 100 volts on the sleeve making it pretty easy to get a
shock. I built my own patch boxes using 1/4 inch TRS jacks with shorting
switches. When nothing is plugged in, the tip and ring are shorted together.
https://w6iwi.org/rtty/20210125_164819.jpg

Harold




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