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Author Topic: Mic /Boom combo. Works on Kenwood TS590SG, but not TS850. Why?  (Read 1688 times)
N1AUP
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« on: January 05, 2019, 02:22:56 AM »

I put one of these together for my Kenwood TS590SG.

https://www.youtube.com/watch?v=gUPmnFakh7o

It works well, and generates good audio reports.

I inherited a Kenwood TS850, and the pin outs on the audio look the same.  I tried using this mic with the 850, and receiving stations report noise, and no audio.

Any suggestions why the mic works with the 590 but not the 850?

Thanks
Chris
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NZ4ZN
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« Reply #1 on: January 06, 2019, 04:21:28 PM »

Does the TS-850 work with its original mic?

If the pinout is the same (taking your word) and impedance is the same (both radios are 600 ohm), then it may be  problem with the 850's mic input circuits.
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N1AUP
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« Reply #2 on: January 07, 2019, 04:05:53 PM »

Yes.  The 850 works fine with the stock mic. 

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ZS5WC
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« Reply #3 on: January 08, 2019, 10:20:40 PM »

 :)Pin for pin, how is your microphone plug wired?.

de William
ZS4L / ZS5WC
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N1AUP
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« Reply #4 on: January 20, 2019, 03:56:01 PM »

I ordered a 8 pin to XLR with PTT pigtail.  I'm going to try that.  Trying to solder wires to those tiny pins is a challenge.

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KB4VVE
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« Reply #5 on: January 27, 2019, 07:34:53 PM »

Just a guess really, but does the TS 850 have power for the mic on the mic lead?  Most modern radios use electret elements that require phantom power - 12V thru 4.7K or so.  My TS 590SG has it.
Greg
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KC3RN
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« Reply #6 on: February 24, 2019, 02:40:01 AM »

Just a guess really, but does the TS 850 have power for the mic on the mic lead?  Most modern radios use electret elements that require phantom power - 12V thru 4.7K or so.  My TS 590SG has it.
Greg

This.  The TS-590 has phantom power on pin 5.  The 850 does not.
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HB9PJT
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« Reply #7 on: February 24, 2019, 08:29:39 AM »

Both have 8 V on pin 5.

73, Peter - HB9PJT

This.  The TS-590 has phantom power on pin 5.  The 850 does not.
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