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M1225 Mic Question

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KB0VWG

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Lyford, Texas
Are there 2 different ways to wire a Motorola mic to a m1225 radio?

The reason why I am asking is that I have 2 other mics Motorola knock offs mics wired differently and I can get the radios into scan mode when those mics are plugged in but the audio doesn't sound as good as the OEM type. With the Motorola OEM mics I am unable to get the radios to scan. Is there something I need to adjust in the programming software? Or just get the mics rewired?
Thanks
Michael
KB0VWG
WQOI992
 

SteveC0625

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Here are the pinouts for the M1225 mic:

1 - 8 volts
2 - Not used
3 - Hook
4 - Ground
5 - Mic Audio
6 - Mic PTT
7 - SCI
8 - Handset Rx Audio

The 8 volts on Pin 1 drive an LED on the stock mic for the M1225, and is non-essential for other mics.

I have used both the HMN1035 and HMN1056 mics on a M1225 with no problems.

Check your programming for "hook suspends scan".

Also, the Motorola mics have to be hung up if "hook suspends scan" is enabled. The center button of the mic hanger is floating and is grounded to the outer ring when in the hanger.
 

SCPD

QRT
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Virginia
Paper clip

If you don't want to reprogram, put a little paper clip on the back of the mike. Fake it out to think it's on a metal mike clip.
 

ramal121

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I have 2 other mics Motorola knock offs mics wired differently and I can get the radios into scan mode
What I think you're saying is with no mic plugged in, the radio won't scan. When you plug in the oddball mic then you can get the radio to scan but not have it in the clip or the button grounded. Is that correct? If so, that's not normal and I would think those mics are for something other that Motorolas. You WILL need to check the wiring.
 

KB0VWG

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Apr 9, 2006
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493
Location
Lyford, Texas
Almost correct

The wiring is different on both mics and the less expensive mic when it is on hook the radio will scan, But when I put the oem mic when I place it on hook it doesn't scan. So that what I was wondering about the mic wiring. I had the Motorola mics rewired by a tech and the cheapo mics were purchased off of Ebay.
I will double check my programming.

I also have the same kind of issue with a kenwood tk-863, I have to dive back into that programming see what can be changed.
Thanks
73.s
Michael
kb0vwg
wqoi992
 
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