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

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What is the dc input voltage for a 7.5V NTN1171A charger for a MTX838?

I have a MTX838 radio but need to replace the transformer for the charger. I am not sure if the input voltage is 9 or 12 volts dc

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The book list the wall adapter to charger NTN1171 as being part number 2580162R01. The description says 13.8VDC 1.5A AC ADAPTER. When googling the part number, it appears someone is selling one on eBay for around $29.99. Retail from Motorola appears to be $125.

Posted on Sep 30, 2008

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The dual charger does not charge the batteries

Simply fix the wall wart. AE6JI 704-745-2067 Extra Class FCC VEC +45 years practical electronics.

There is a fine wire, (under the paper wrapping) or on the transformer, re-close, and it will work 99% of the time.

WARNING random wall warts WILL vary, up to 200% of what their rating label states!

Next time do not have the wall wart plugged into the Wall AC, until AFTER you plug it into the radio.

Jan 09, 2015 | Radio Communications

1 Answer

What voltage DC charger does a Midland LXT326 use?

How many batteries connected in series at the battery pack there is?each one is 1.2 Volts, just add each one and add 10% Voltage.The final voltage is it

Jul 09, 2014 | Midland Radio Communications

1 Answer

Will not charge radio

See input voltage for charger and at the pins of charger, if voltages are ok then check the battery.

Jan 24, 2014 | Icom BC-152N Direct Trickle Charger

1 Answer

We just bought motorola MR350R radios. hubby unwrapped the battery and stuck it into the charger. the light went for a minute or so, then went out. Has he blown the battery or the charger, or both. to...

What is the input voltage listed on the charger? It is probably on the large transformer that plugs into the wall. If it says 120-240v then you should have been able to use it. If it is only meant for 120v, then you have blown out the transformer and you need to purchase a 240 volt adapter. Tell me what it says and I can help you further.

Dec 07, 2012 | Motorola Walkie Talkie 2-Way Radio

1 Answer

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.

Oct 08, 2009 | Motorola MU21CV (1 Channel) 2-Way Radio

1 Answer

1. isthe battery charging 2.isthe charger

You don't mention a make or model, so I can only give you general solutions. If the radio has a drop-in charger there may be a light to indicate charging. If the light comes on when the radio is in the charger, it's getting a charge. If you have a multimeter, DVM, or DC voltmeter you can check the battery voltage (charge) both before and after a charging cycle. You can also use the meter to confirm the output from the charger. If possible, replace the batteries with standard alkaline types and see if the radio works. I hope this info helps.

Bill B.
San Antonio

Apr 30, 2009 | Motorola Walkie Talkies 2-Way Radio

1 Answer

T5530 chargers

Read the back of the transformer and see what the output voltage is. Find another transformer with something within 1-2 volts of what the broken transformer is. If you are lucky you will find one with the same size plug, if not you will have to change plug. Any transformer within 1-3 volts over will work.
Most people have them in junk drawres.

Jan 22, 2009 | Motorola TalkAbout T5530 2-Way Radio

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I need an electrical connection for 2-way Radio charger base.

Check the voltage of the battery and pick something 1-3 volts higher.

If you have an ohm meter you can meter between battery contacts and charger wall wart jack and see which one is positive and negative and match your transformer up to it.

Jan 16, 2009 | Cobra 2 mile FRS 2 pack Value Pack with...

1 Answer


In the UK, Uniden is a brand name of MagicBox. Their customer services might be able to help:

May 26, 2008 | Uniden Radio Communications

1 Answer

Lost power supply


If the desktop charger is the version that can accommodate two radios simultaneously similar to the T5000, then the AC wall adapter or the power supply is 9 volts AC.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

May 26, 2008 | Cobra Radio Communications

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