[GreenKeys] WU 9797 LESU Jacks TR or TS?

[Nick England]

And preferably a good old-fashioned plug with a rounded tip - some of the
newer plugs have a sculpted tip that may not disengage the jack's NC
contact - drove me batty trying to use a set of eBay Chinese patch cords -
worked on some jacks but not on others.
Nick England K4NYW
www.navy-radio.com


On Fri, Dec 2, 2022 at 9:14 PM Nick England <navy.radio at gmail.com> wrote:

> Use only a 2-conductor plug - tip/sleeve.
> None of this new-fangled TRS stuff like on your Koss Pro/4 stereo
> headphones
>
> Nick England K4NYW
> www.navy-radio.com
>
>
> On Fri, Dec 2, 2022 at 8:40 PM W2HX <w2hx at w2hx.com> wrote:
>
>> Ok, I am learning a lot about how this is connected. For 15 years this
>> ASR just worked, I never had to worry about it so I never had to learn
>> about how it is wired up. I have a question for those of you who are
>> familiar with this LESU.  I have a 60mA meter (newly crafted) that works
>> great when I plug it into my external jack field for my ST-6. Reads about
>> 55mA sounds good to me. I then plugged in the meter into the BJ, RJ and PJ
>> expecting to see something. However I saw zero current and the act of
>> inserting the plug (of the meter) into PJ caused the printer to run open
>> (and I know my meter is not open!).  Also BJ showed zero bias which I don’t
>> think is the case.
>>
>>
>>
>> So I got to thinking. Maybe the plug on the meter isn’t “compatible” with
>> these jacks on the LESU. I am using what I believe to be fairly standard
>> TRS plugs and I am using the Tip and Ring for the loop. Can anyone tell me
>> if, perchance, the jacks in the LESU are expecting something else, perhaps
>> Tip and Sleeve? That could explain what I’m seeing? Anyone know?
>>
>> https://w2hx.com/x/TTY/43A-1%20Test%20Meter/20221202_203627.jpg
>>
>>
>>
>>
>>
>> 73 Eugene W2HX
>> Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos
>>
>>
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