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GeneralRe: Is Bill Gates a sex addict? Pin
Sander Rossel17-May-21 9:35
professionalSander Rossel17-May-21 9:35 
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Member 1292431218-May-21 3:24
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GeneralI'll be here all week... PinPopular
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GeneralWell I'm glad I looked that up first Pin
Peter_in_278016-May-21 21:48
professionalPeter_in_278016-May-21 21:48 
I've been building a microphone preamp to use with an old smartphone for sound recording. So the interface is the 4-pole 3.5mm plug.
Expanding on the "tip/ring/sleeve" terminology for the 3-pole (typically stereo audio) variety, let's call it
tip ring1 ring2 sleeve
 O=  ===   ===   ====[
So tip is left earphone, ring1 is right earphone for compatibility with 3-pole stuff. All good so far.
The plug is like all the 2- and 3-pole ones I've seen, where the extended sleeve contact doubles as a cable clamp.
That's got to be earth/common/shield, right?
WRONG! Ring2 is common, Sleeve is microphone hot.
Makes terminating the cable an absolute sunshine of a job.
Mad | :mad: Mad | :mad: Mad | :mad:

Cheers,
Peter
Software rusts. Simon Stephenson, ca 1994. So does this signature. me, 2012

GeneralRe: Well I'm glad I looked that up first Pin
OriginalGriff16-May-21 22:16
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GeneralWSO CC OTD 2021-05-17 - I win again! Pin
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