Question about Uniden GMR648-2CK (22 Channels) 2-Way Radio

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Transmit/receive indicator doesnt turn off on one of the handsets, so that it receives white noise for a period of time after someone talks. Does anyone please know how to turn it off? Thanks.

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Not familiar with this particular radio but it should have an eliminator code. Try setting an eliminator code on both radios, ( they must use the same code on each channel) if you want to talk between the two. If there is a "MON" ( montior ) button, try pressing and holding it in until you hear a confirmation beep.
Hope this helps you.

Posted on Feb 26, 2009

  • addytza Feb 10, 2011

    i have the same problem with one of mine. only that on my handset that indicator is on permanently and doesn't want to go off which means i can't recive anything. I can only transmit.
    I wonder if there is a way to reset them.

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2 Answers

Why is humming coming from speaker when mic is keyed?


this is strange as most times if a proper transmit key is depressed , then the radio switches from receive to transmit , the mfg know this would cause some great squeal from receiver /transmitting so close to a receiver so the part that is the receiver is muted to keep this from happening , id say there is some fault in the part that does this muting of receiver

Apr 13, 2016 | Radio Communications

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I cannot set QT filltering on..why?


Here are the instructions from the manual:

To transmit to a radio that has QT noise filtering turned on:

1. Select the same channel and Interference Eliminator Code as the other radio.

2. Press 'musical note' button to send a call tone. This allows your voice to pass through the QT

noise filter on the receiving radio.

3. Press the PTT and speak normally.

Note: If you skip step 2, the beginning of your message may not be heard on

the receiving radio.

For a 30-second period, starting after the last transmission, all transmissions
received on the selected channel and code will pass through the QT noise filter.

Also, your QT filtering will NOT work if you are in scan mode.

http://www.giantintl.com/RadioPDFs/Outdated%20Manuals/T56XX_57XX_User_Manual_E.pdf

Best regards.

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2 Answers

My walkie talkies arent communicating when i press the ppt button. it transmits too fast before i get a chance to talk into it. what can i do to fix them? is there a reset button? they are the motorola...


The ACTUAL problem is your rechargeable batteries have most likely depleted over time, and since it takes more batterie power to transmit than to receive it can appear that your batteries are fully charged and you can be receiving but due to the batterie it will be unable to transmit

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1 Answer

How can I get the telephone on my Brother Fax T96 to work?


Step by step information at the link below.
Brother Fax T96
The F/T Mode is used to allow the fax machine and the telephones to share the same telephone line. When a call comes in, the fax machine and all extension telephones on that line will ring according to the number of rings you have set for the Ring Delay.
When the Ring Delay is completed, the fax machine will answer the call and determine if it is a fax call or a telephone (voice) call.
The fax machine can determine this by the signal it is receiving on the telephone line. If someone is sending a fax automatically , the sending fax machine will transmit a fax tone (a series of beeps every 3 seconds).
If your fax machine hears these tones, it will receive the fax.

If the fax machine does not hear any fax tones, it assumes it is a telephone (voice) call and will begin ringing the F/T ring tones (double ring) for the length of time you selected for the F/T Ring Time. These tones will only ring on the fax machine's handset (extension or external phones will not ring). At the end of the F/T ring time the fax machine will go into the receive mode in order to receive a manual fax.
(If the call was a voice call and was not answered, the caller will hear the fax receive tones also).
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  • If you answer the call on an "extension" phone and hear a beep every 3 seconds (automatic fax) or silence (manual fax), press *51 or *91 for New Zealand (remote activation code) on the telephone keypad, wait to hear the fax machine turn on (chirping sounds) and then hang up.

  • If you answer on the handset of the fax machine and hear a beep every 3 seconds or silence, press the Fax Start or Start/Copy key on the control panel of the fax machine and then hang up the handset.

  • If you answer a call on an "extension" phone during the F/T Ring Time, you will hear the F/T ring tones.
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  • If you pick up the handset of the fax machine during the F/T ring time, you may talk to the calling party immediately.

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1 Answer

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What you are describing indicated the "code" is not set the same on both radios. Check your frequency, interference code eliminator and Qt filter (if any). All the settings must be identical between the two radios. If you are still having issues, set your code and Qt filter (if any) to zero (off) and then try it. Lastly, check your batteries. Bad or poorly charged batteries can cause transmit issues, as it takes more power to transmit than to receive.

Here's a link to the manual: http://www.giantintl.com/RadioPDFs/Outdated%20Manuals/T4500_User_Manual_E.pdf

Best regards.

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1 Answer

Correct wiring for a ASTATIC TEARDROP MIKE to a RANGER RCI 2950DX


here is the info you asked for the following is the correct wiring.


Mic Wiring Info
Stock Mic Wiring
1. Ground Shield
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3. Transmit Red
4. Receive Black
5. CH. Up White
6. CH. Down Blue
Turner 4-Wire MIC. Wiring
1. Ground Shield
2. Audio White
3. Transmit Black
4. Receive N/C
5. CH. UP N/C
6. CH. Down N/C

Turner 6-Wire MIC. Wiring
1. Ground Shield & Red
2. Audio White
3. Transmit Blue
4. Receive N/C
5. CH. UP N/C
6. CH. Down N/C

Astatic 4-Wire MIC. Wiring
1. Ground Shield
2. Audio White
3. Transmit Red
4. Receive N/C
5. CH. UP N/C
6. CH. Down N/C

Astatic 6-Wire MIC. Wiring
1. Ground Shield & Blue
2. Audio White
3. Transmit Red
4. Receive N/C
5. CH. UP N/C
6. CH. Down N/C

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1 Answer

Motorola T5420 Transmit Problem


Here are some troubleshooting thoughts:

1. Is your battery indicator showing at least 2-3 bars? (Battery Note: Your rechargeable batteries may fail due to setting without use for a long period of time. They need replaced every 12-14 months usually. A good tip is to charge them once a month to keep the chemical in the battery active.)

2. Check to see your Qt noise filter is shut off. Refer to page 22 of the owners manual. It is possible you have some radios set to Y and others to N. To assure good communications you should set all of them to N.

3. With your radios set to interference code zero, place your radios one at a time in scan mode, while you transmit/talk on one individual radio. See if any of the radios receive. Do this with each radio individually to see if you are transmitting at all. NOTE: This test will determine if you have any ability to transmit. If you do not receive any sound on the 3 radios setting in scan mode, the individual radio you are testing will not transmit.

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1 Answer

The marine cb radio turns on but you can't here noboby talking nor can u talk out from the cb


Sound like either an antenna problem, or a mic problem.

The mic on most cb's also serve as transmit/receive switching. A broken wire or bad switch in the mic or cord can cause either or both to fail.

If you have a bad antenna (or cable), you should still hear squelch noise on receive (maybe lower in volume) and be able key the mic and get a transmit light on the unit. Visually inspect the connector, cable and antenna. If need be use an swr meter to prove the antenna system is bad.

Hope that helped...

Geno

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2 Answers

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Do you have another phone (cell phone) you can use to make a test call to yourself? If you can answer a call and the Uniden transmits voice OK, then it is probably the speaker and may just be a bad solder connection. If the handset does not transmit or receive I seriously doubt you have a bad microphone AND a bad speaker, you'd be looking at something more serious.

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