20 Most Recent Motorola MU21CV (1 Channel) 2-Way Radio Questions & Answers

0helpful
1answer

Motorola CP200, radio just beeps when im pressing any button.
It is possible your radio is not programmed, or has a bad/old battery.

It is normal for the side buttons 1 and 2 to beep when depressed to indicate you turned the feature on/off. Each of these buttons has the ability to be programmed a long and a short press feature.

If your radio beeps when your press the PTT button, on any or all channels, it indicates a low or nearly dead battery. Check your battery date code to see if the battery needs replaced.

If your radio emits a long tone on a channel, that channel is not programmed to function.

If your radio beeps a single beep when you turn it on, this is normal.

Charge your radio completely overnight, with the radio turned off. See if this solves the problem. If not, try a new/different battery to see if it will solve the issue. If not, drop by your local dealer and let them look at the unit.
Read full answer
3/3/2021 2:38:26 PM • Motorola MU21CV... • Answered on Mar 03, 2021
0helpful
1answer

Does a motorola gm300 model number m43gmc29c2aa
Yes, it seems to me that the GM300 radios did have tones as programming options. They were programmed by the dealer using radio service software (RSS) when the frequencies and other channel information were entered. Of course, Motorola discontinued the GM300 a long time ago, and they were wide-band radios, so you could not legally transmit with them anymore. However, you could find someone on eBay to program them receive-only with or without CTCSS (PL) tones and then you could simply listen to them.
Read full answer
11/18/2017 5:34:14 PM • Motorola MU21CV... • Answered on Nov 18, 2017
0helpful
1answer

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.
Read full answer
8/8/2013 4:03:58 PM • Motorola MU21CV... • Answered on Aug 08, 2013
0helpful
2answers

Where can i buy battery terminals for my spirit mu21cv walkies
Your local Motorola radio dealer should be able to help you with this.
Read full answer
9/24/2012 6:13:37 AM • Motorola MU21CV... • Answered on Sep 24, 2012
0helpful
2answers

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.
Read full answer
9/5/2012 4:56:46 PM • Motorola MU21CV... • Answered on Sep 05, 2012
0answers

Frecuencia de transmicion de radio spirit mu21cv
Read full answer
Be the first to answer 7/21/2012 4:12:10 AM • Motorola MU21CV... • Posted on Jul 21, 2012 • Be the first to answer
0answers

Manual of motorola spirit mu21cv
Read full answer
Be the first to answer 2/15/2012 1:48:39 PM • Motorola MU21CV... • Posted on Feb 15, 2012 • Be the first to answer
0helpful
1answer

I need to know if
Look at the model number. Following three alphabet letters it will have either the number "00" (narrowband) or the number "20" (wideband).

Best regards.
Read full answer
8/31/2011 3:59:57 AM • Motorola MU21CV... • Answered on Aug 31, 2011
0helpful
1answer

I have a motorola mv11c
Hold in the PTT button while you turn on the radio. It will announce the frequency number. You can use the PTT button to change the number. Then press the Monitor (small possibly red) button to lock in your setting. The next number your radio announces will be the Code. Use the same method to change the code if needed. Then press the Monitor button to lock in your setting. Once you have set both your freq and code you can turn the radio off, then turn back on normally and use the radios.

Best regards.
Read full answer
7/23/2011 3:10:54 PM • Motorola MU21CV... • Answered on Jul 23, 2011
0helpful
1answer

Anyone know where I can get a copy of the Motorola
Hi,
I alway try Retrevo for missing manuals. I plugged in your model number and found it for you. Visit the Retrevo site to get it here:
http://www.retrevo.com/s/Motorola-MU21CV-2-way-Radios-review-manual/id/23044ag608/t/1-2/
Hope this helps!
Read full answer
5/5/2011 6:59:40 PM • Motorola MU21CV... • Answered on May 05, 2011
0helpful
1answer

I have a Motorola MU21CV
  • 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
Read full answer
5/4/2011 6:50:13 AM • Motorola MU21CV... • Answered on May 04, 2011
0helpful
1answer

The radio will not turn
The two items that most commonly cause this problem are a bad charger or a bad battery. First try putting the radio in a different charger. If the problem persists, swap the battery with one from another working radio.
Read full answer
11/2/2010 2:44:20 AM • Motorola MU21CV... • Answered on Nov 02, 2010
0helpful
1answer

Will the MU21CV radio's work
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


Read full answer
11/2/2010 2:25:57 AM • Motorola MU21CV... • Answered on Nov 02, 2010
0helpful
1answer

When i try to talk
Two things come to mind. First, you may have a bad battery. It is typical for a bad battery to cause the radio to have static, or poor transmit. Second, you may not have the radios set to the same frequency as one another, or one is on a narrowband frequency, and the other is wideband. (Depending on the age of the two units.)

Try switching the batteries between a working radio and the staticy radio. See if the problem moves to the other radio. If so, replace your batteries.

Check your programming, if you don't know how, contact your local Motorola dealer or give us a call (google our name). We can walk you through programming over the phone.

Lastly, if all these suggestions fail, your radio may be in need of repair. Flat rate repair is currently around $69 ea.

Best regards.
Read full answer
10/18/2010 8:45:40 PM • Motorola MU21CV... • Answered on Oct 18, 2010
0helpful
1answer

Can you give me the specs on:
I think this is what you are looking for: Motorola Radius GM300 VHF 146-174mhz 16 channel 45 watt mobile (MDL# M43GMC29C2AA)
Read full answer
8/11/2010 9:34:50 AM • Motorola MU21CV... • Answered on Aug 11, 2010
0helpful
1answer

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.
Read full answer
1/11/2010 2:40:09 AM • Motorola MU21CV... • Answered on Jan 11, 2010
0helpful
2answers

Compatability
would a MU21CV be a VHF or UHF????
Read full answer
1/11/2010 2:18:16 AM • Motorola MU21CV... • Answered on Jan 11, 2010
0helpful
1answer

I have several MU22 series radios. they work
The MU22 will not do what you are attempting to do. You can't put in a control voltage on one end and have it come out on the other. 2-way radios Tx and Rx (communicate) using audio signals. The speaker output and audio input are audio signals, not DC voltages or control voltages.

A radio can be used as a remote control method, however, a conversion needs to be done on both ends. Example: Turning a lamp on, at the Tx end you would have a converter which will take a control signal and convert it to an audio tone. On the Rx end (the lamp) there will be another converter, this converter listens for the correct tone and when it gets the correct tone, it turns on the lamp. This example is what you call tone-remote control, which is one of the most common methods for using 2-way radios for remote control applications.

There are other methods for remote control such as telemetry. Keywords to google would be telemetry and tone remote control.

Best regards.
Read full answer
10/9/2009 8:52:43 PM • Motorola MU21CV... • Answered on Oct 09, 2009
tip

Battery and charger tips
The M series Motorola radios such as the MU21CV, come equipped with a NiCD rechargeable battery. This battery when fully charged should operate the radio a full 8-10 hour business day. The batteries have a life expectancy of 18-24 months.

The original Motorola battery has a date code in the white box above the stop sign on the back of the battery. The first digit is the year, and the next two are the week of the year. Example: 919 would be 2009, the 19th week. (Unless very old and it could be 1999)

When replacing the battery it is important to install the battery correctly. Put the top of the battery into the radio first, then slide the bottom into place. This method will cause the least pressure on the internal battery contacts.

If you battery's contacts are dirty or filmed, simply clean them with a pencil eraser. Do not use solvents or a knife blade on the contacts. The radio's contacts can also be cleaned with a pencil eraser.

The wall adapter style charger which came with the M series radio can burn out over time (much like a lightbulb). Replacement chargers are available. If your charger light is flashing, you most likely have a bad battery. If your charger light does not illuminate, you have a bad charger.

Replacement batteries and chargers are available, as is repair of this style unit.

Best regards,
eradiostore
Read full tip
on May 08, 2009 • Motorola MU21CV (1 Channel) 2-Way...
0helpful
1answer

Transmit button on the lapel mic will not key the radio
Two things which come to mind, one would be if the PTT on the remote mic is bad/defective, second would be you are plugging the audio device in with the radio turned on.

If your remote mic is failing, the PTT is a repairable item, as is the cord on most models.
Read full answer
3/30/2009 8:13:18 PM • Motorola MU21CV... • Answered on Mar 30, 2009
Not finding what you are looking for?
Motorola MU21CV (1 Channel) 2-Way Radio Logo

Popular Tags

32 questions posted

Ask a Question

Usually answered in minutes!

Popular Products

Motorola Talkabout T5720 (7 Channels) 2-Way Radio
Motorola Talkabout T5720 (7 Channels) 2-Way Radio

165 Questions

Motorola HT1000, MTS2000, MTX8000/9000 Compatible 2 Way Radio Battery Eliminator
Motorola HT1000, MTS2000, MTX8000/9000 Compatible 2 Way...

154 Questions

Motorola Talkabout FRS 250 (14 Channels) 2-Way Radio
Motorola Talkabout FRS 250 (14 Channels) 2-Way Radio

90 Questions

Motorola Walkie Talkies 2-Way Radio
Motorola Walkie Talkies 2-Way Radio

92 Questions

Motorola CLS 1110 (1 Channel) 2-Way Radio
Motorola CLS 1110 (1 Channel) 2-Way Radio

70 Questions

Top Motorola Radio Communications Experts

eradiostore
eradiostore

Level 3 Expert

1672 Answers

ZJ Limited
ZJ Limited

Level 3 Expert

17989 Answers

ExpressFiX
ExpressFiX

Level 2 Expert

691 Answers

Are you a Motorola Radio Communication Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

View Most Popular

Motorola Radio Communications

  • Motorola Radio Communications

Most Popular Question

motorola mu21cv

  • Radio Communications
Loading...