[GreenKeys] TTY loop jack boxes - eBay

[Nick]

I insulated all conductive sleeves with heat shrink, no problems here what so ever - I'm still standing :-)
But I definitely like Harold's idea too with the shorting switches ‐ I have to look into that.

Nick - N0NCQ



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-------- Original message --------
From: Harold Hallikainen <harold at w6iwi.org>
Date: 8/8/21 2:48 PM (GMT-05:00)
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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