It's the same plug as used for T-17 etc al<br>WWII carbon miles.&nbsp; The collar of the socket has a knurled nut which has to be rotated full clockwise in normal operation IIRC.<br>__________<br>On Wed Sep 18 18:12:19 CDT 2024 MARK DORNEY via ARC5 <arc5@mailman.qth.net> wrote:<br>


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   Just got the receiver Switch box CW-23087 for the RU-19 receiver. I noticed the jack socket for the meter connection is slightly smaller in diameter than the headphone Jack that the RU-16 uses. Anybody have any ideas what plug is used for the meter? Any help is appreciated.<br></div>

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