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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

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Old 18th May 2019, 9:04 am   #1
sidspop
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Default Mic wiring details, PYE MX290

I have one converted to 4 metres, but no microphone.
I did find the pinout for 5 PIN DIN mic socket ages ago, but cannot locate it now on internet search.
Does anybody have it please?
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Old 18th May 2019, 9:19 am   #2
davidw
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Default Re: Mic wiring details, PYE MX290

Its a 5pin din
1...Mic Live
2...Ground
3...10v PTT line
4...RX low level audio
5...10v output
The PTT is taken to 10v +ve not ground on transmit..
Hope this helps
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Last edited by davidw; 18th May 2019 at 9:22 am. Reason: add info
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Old 18th May 2019, 9:34 am   #3
sidspop
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Default Re: Mic wiring details, PYE MX290

Thanks David.
I looked all over for it.
Evidently not in the correct place...
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Old 19th May 2019, 10:06 am   #4
SiriusHardware
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Default Re: Mic wiring details, PYE MX290

If you have difficulty getting a third party microphone to work nicely I believe I have one or two original Pye M290 / MX290 microphones (with plugs fitted) stashed somewhere in the loft. They may be either conventional fist type microphones or the quirky looking 'shaver' microphones, not sure what I have left.
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Old 19th May 2019, 10:27 am   #5
sidspop
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Default Re: Mic wiring details, PYE MX290

All sorted now.
I have a number of Skiptech hand mics with electret insert and up/down buttons on top.
No idea what they are for, I removed the 5 pin din and plug on the end of the mic and used a normal 4 pin connector.
Not bothered about originality, the radio owes me nothing as it came as part of a job lot.
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Old 19th May 2019, 11:19 am   #6
SiriusHardware
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Default Re: Mic wiring details, PYE MX290

I use a low-band MX290 on 4m - it's one of the nicer looking ones fitted with a reprogrammed CX290 control head which functions as a frequency display and channel up/down step controller.

The only minor drawback is the lack of an s-meter, but it's such a nice looking radio that I would be reluctant to hack holes in it for an edge-reading s-meter or a row of LEDs.
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Old 19th May 2019, 8:21 pm   #7
sidspop
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Default Re: Mic wiring details, PYE MX290

True.
I use the theory if I can hear them, I can hopefully work them.
If they can't hear me then we have not had the contact.
S meters do not bother me, if I was bothered I would simply use an external one, fed via a flying phono lead.
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