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M1225 GMRS Repeater

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#1 Guest_Guest_*

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Posted 04 April 2020 - 09:17 PM



I have acquired 2 Motorola M1225 radios. I have an ID-O-Matic for the controller. I am having issues with the transmit radio not keying up. I have set the M1225 receive radio to COR active low. Can anyone shed some light on how to get the transmit radio to key up?

#2 rodro123


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Posted 05 April 2020 - 06:25 AM

What Duplexer are you using? 

#3 Guest_Chris_*

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Posted 16 April 2020 - 09:21 PM

Chris here, no GMRS call yet but WA7ZAF in another service.  I have a 220Mhz repeater on the air.  I originally had one of those cheap Chinese duplexers on it but it had trouble receiving signals from 5w handhelds that were further than 10 to 12 miles away.  I put a full size, $1600 Telewave duplexer on it and now I can hit it from inside my office with a 5w HT from 20 miles away.  The duplexer can make a HUGE difference in receive sensitivity.

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