On Monday, April 20, 2026 at 05:06:05 PM PDT, Duncan Brown via GreenKeys <[email protected]> wrote:

Charlie,

Some units will put a short on the line when the power is off to the unit.

Good luck,

Duncan
K2OEQ

On 4/20/2026 6:25 PM, Charlie Beck via GreenKeys wrote:

Hello,

I have a model 28 ASR wired in half duplex. I had been successfully using it with an interface I am building until it stopped operating. I measured the resistance of the loop and it's a dead short. After unpluging evreything from the Electrical Service Unit there is still a short on the loop. I checked the coils and they are not shorted. I am not very knowledgeable on the workings oif these machines apart from the basics. Is there anything that come to mind that might be the source of my problem?

Thanks,

Charlie Beck

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______________________________________________________________
GreenKeys mailing list
Home: http://mailman.qth.net/mailman/listinfo/greenkeys
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]

>>> Jordan Spencer Cunningham's GreenKeys Search Tool: https://teletype.net/gksearch
>>> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
>>> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
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