Troubleshooting a Deaf Motorola M120 Radio, Start to Finish

[@TheConstitutionalGuardian]

I'm yelling at the T.V. your rx cable is not fucking plugged in. My wife is like, who are you talking too?

[@Nightdriver54]

Great video. It actually shows what kind of pain staking process that one goes through in order to trouble shoot a problem. I have a service monitor exactly like yours but not real familiar with it. Thanks for the lessons. Always want to learn something new.

[@misteraon]

I’ve been able to program similar radios (MaxTrac 100/Radius m120) without a straight DOS computer and a USB FTDI to Motorola RJ45 cable from eBay. I use DOSBox emulation at 191 cycles. Seems to work fine inside of a windows XP VirtualBox run on a mac. Go figure double emulation. Had to do it that way as I couldn’t figure out how to set the baud rate on the FTDI cable on the Mac to run DOSBox directly on the Mac. Windows handles that fine.

[@willwaconsya3433]

I have an m120 m43gmc20a2aa. It has a 16 pin connector on the back. The speaker is muted due to the fact it was programed to only open the speaker when a repeater tone is received. I need to know what 2 pins have to jumped to get the receiver sound to remain on. Also I need how to wire up a cable to program the radio. And where to get software. Can you help me?

[@michaelklingkammerdawnmari3246]

I think the radio you are showing is the Motorola sm 50 or 60 two channel radio. I have the Motorola radius SM 120 and it has a backlit screen LCD screen showing channels 1 thru 10 and I can not find any instruction manual for it to figure out how to get it to scan and I don't have the software to program it and do not have the serial? Cable for programming it with DOS. I apparently can not find out what frequency is in each channel unless I had test equipment that could broadcast on many frequencies until the radio received the frequency or I could get a frequency box and transmit from the radio and have the box identify the frequency and the radio you are showing is not the radius SM 120. Michael Klingkammer

[@SmittyHalibut]

I keep reading the “DEAF” label on the heat sink as “DECAF” and its messing with me.

[@fernmoor02]

Usual fault for GM300 models is that crystal 44.645 mhz, nothing else.

[@MrGhostVortex]

Absolutely love your radio videos, always entertaining and interesting to watch. Please keep making them!! Are these radios capable of 2watt TX power? I'm attempting to set up a small company with MURS radios in their service trucks. I'm a Kenwood guy myself, running several for GMRS currently, but I'm having trouble finding 2 watt capable moble radios. I came across an article a while back stating that some GM300s could be 2 watt capable, but again I'm not a Motorola guy, so I'm not familiar with this. I dont need all 5 MURS channels, 2 at the most is just fine.

[@KennethFinnegan]

This one isn't capable of 2W since it's a power range "4". You can't tune the PA down that low because it starts to go a little bonkers that far out of the 25W-40W design range. There was a power range "0" model that was extremely rare that was rated for 1-10W that would be exactly what you want. Very popular for point to point links and as exciters for external PAs for repeaters.

[@LongnoseRob]

UHF APRS is not a thing in the US?

[@KennethFinnegan]

Nope. States can't agree on voice simplex channels, let alone a continental APRS channel.

[@analogatman]

hi friend, is posible helpme whit a codeplug vhf of m120, thanks for all.

[@justinherman9443]

Can you film the aprs setup with this radio?

[@KennethFinnegan]

Yep. Already started working on that.

[@justinherman9443]

@@KennethFinnegan looking forward to it.

[@Yellwolf]

Totally enjoyed it

[@jbx907]

🥰🥰🥰

[@miguelmuniz7038]

I see you work on two-way radios I got two radios to be worked on I like to know could you work on mines and I will pay you

[@KennethFinnegan]

I don't do paid jobs, thanks.

[@luisitoaventuras8098]

Hi can You help me to figure out was going on with My Motorola m120? Here's a video of it, i just replaced the TX Crystal oscillator But still the problem kzbin.infoRl7WT2NobME?si=zE690h9GQa1E25gj