Question about Motorola MU21CV (1 Channel) 2-Way Radio

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MU21CV my radio MU21CV WAS STORED 5 YEARS. NOW I WANT TO BE USE THEM & MY RADIO CAN'T BE ON. WHAT CAN I DO?

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  • Motorola Master
  • 1,640 Answers

It is likely your radio needs a new rechargeable battery.

Posted on Jun 24, 2008

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1 Answer

Cant sync radios


The MU21CV radio is user programmable. Hold in the PTT button while turning on the radio. It will announce the frequency. Use the PTT button to count it up to the frequency you desire. Press the smaller monitor button to lock in your freq. Then the radio will announce the code number. Once again using the PTT button count it up to your desired code or the word OFF if you are not wanting a code. Then press the monitor button to lock in the code. At this point you can turn off the radio and turn it back on normally (without holding in the PTT). Your radios should be programmed to match one another. If you are still having trouble you may have a radio which needs repair or a bad/low battery.
Best regards.

Aug 05, 2013 | Motorola MU21CV (1 Channel) 2-Way Radio

2 Answers

Where can i buy battery terminals for my spirit mu21cv walkies


Your local Motorola radio dealer should be able to help you with this.

Mar 23, 2012 | Motorola MU21CV (1 Channel) 2-Way Radio

1 Answer

I have a Motorola MU21CV with a overly sensitive 'push-to-talk-switch'. Sometimes even though you press it and get the "red" transmit indication - it's not transmitting. Is there anyway to...


  • You can open the radio up and clean the switch up a bit but it sounds like the switch may be worn. It's a simple on off push switch. You may just go to your local hardware store or electronics store and get a switch and solder it in.


Regards, Tony

May 03, 2011 | Motorola MU21CV (1 Channel) 2-Way Radio

1 Answer

Will the MU21CV radio's work with the talk about radios?


Short answer, maybe. It depends on whether you have a 14 channel or a 30 channel Talk-About. The Motorola Talk-Abouts operate on the FRS frequencies (14 channel) or FRS & GMRS frequencies (30 channel). The MU21CV does cover a few of the GMRS frequencies. (see bold numbers)

GMRS Frequencies
462.500, 462.575, 462.600, 462.625, 462.650, 462.675, 462.700, 462.725, 467.550, 467.575, 467.600, 467.625, 467.650, 467.675, 467.700 & 467.725

FRS Frequencies
462.5625, 462.5875, 462.6125, 462.6375, 462.6625, 462.6875, 462.7125, 467.5625, 467.5875, 467.6125, 467.6375, 467.6625, 467.6875, 467.7125

MU21CV Frequencies
464.500, 464.550, 467.7625, 467.8125, 467.850, 467.875, 467.900, 467.925, 462.575, 462.625, 462.675, 464.325, 464.825, 469.2625, 469.500, 469.550, 462.7625, 462.7875, 462.8125, 462.8375, 462.8625, 462.8875, 462.9125, 464.4875


Nov 01, 2010 | Motorola MU21CV (1 Channel) 2-Way Radio

1 Answer

Is the motorola MU21CV a UHF or VHF??????


MU21CV is a UHF radio.

MU= UHF
MV = VHF

Here is a link to the user guide: http://www.giantintl.com/RadioPDFs/Outdated%20Manuals/Spirit_M_Series_E.pdf
You can find a frequency chart on page 10.

Best regards.

Jan 11, 2010 | Motorola MU21CV (1 Channel) 2-Way Radio

2 Answers

Compatability


would a MU21CV be a VHF or UHF????

Aug 12, 2008 | Motorola MU21CV (1 Channel) 2-Way Radio

2 Answers

Motorola spirit mu21cv


Hi,

The problem of failing to power on can be caused by:
1. dead battery (may no longer hold a charge);
2. corroded battery terminals or connectors;
3. open wiring from the battery casing to the internal circuitry;
4. defective on/off switch; and/or
5. defective regulator component(s) on the main PCB.

On the other hand, problem on receive can be caused by:
a. defective or worn out volume control (if manual/rotary);
b. defective or worn out squelch control (if manual/rotary);
c. mismatch in PL or CTCSS code; and/or
d. defective internal speaker.

Most can be checked with the use of a continuity tester or a DVM. Repairs involve knowledge and familiarity with electronic components and circuitry and perhaps even the use of a soldering iron. Should you not be comfortable doing it yourself, perhaps your best bet would be to seek the services of a qualified professional.

Hope this be of help. Pls post back how things turned out or should you need additional information.

Good luck and kind regards.

Feb 05, 2008 | Motorola MU21CV (1 Channel) 2-Way Radio

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