Question about Uniden PRO510XL 40-Channels Base CB Radio

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Radio transmits fine but the receive volume is way down. Can hardly hear it with volume turned up full.

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If you have talk back in this radio.( you hear your self through the radio when you transmit) then its a good bet that the RX wire in the mic plug has broken off.

The mic switch is responsible for putting the radio into receive mode when you release the key. If the RX wire is broken, the radio will not go into receive.

Normally when this happens you have no receive at all no matter what, but you will have very low sound if you have talk back installed in the radio.

Because of this, if you have talk back in your radio, and the volume is faint even at full blast, its a good bet that its a broken RX wire in the mic cord or plug.

You can attempt to see if the break is at the mic plug. if it is, you can re solder it and it will solve your problem. If you have no clue, then you can just go buy new 4 pin mic.

Posted on Nov 17, 2010

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1 Answer

Cp200 squeel


This is called feedback. The audio output from the other radio is feeding back through your microphone. Turn the volume down on the radio at a comfortable listening level, and do not transmit when in close proximity. If they can hear you speak, you do not need to transmit.

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1 Answer

No sound on unit


There are any number of reasons for no sound. I will assume you're using new batteries or fully charged batteries. The simplest reason is that a wire has become disconnected from the speaker. This would make the radio sound the same on as off. To test this see if the radio has a way of turning the squelch off, sometimes a simple push button, sometimes a menu setting, sometimes a dial to adjust the squelch setting. If there is no hissing, sometime very loud so turn your volume down first, then either the audio output amp is dead or a wire to the speaker is broken or disconnected. I today's radios the audio amp is most likely a simple small IC but, it could be inside an all-in-one chip and if it's proprietary getting the chip could be a problem. If it's a simple audio chip you'll have to find a replacement or rig up another audio amp IC to work as a replacement. Let's hope for the simple broken or disconnected wire which should be easy enough to fix.

Now, if when you remove the squelch you hear the hissing but you still cannot hear transmitting from your other radio, it could be that the one transmitting is in fact NOT transmitting an not that the other radio cannot hear. You have checked that both radios can or can not hear someone else's radio right?

Assuming you do know that one radio cannot hear what the other can and make no sound other than hissing when the squelch is off the problem is either in the RF or IF sections of the radio's receiver. In general this used to be a more complex repair so let's go another easy fix by going to the very first place the RF comes in, the antenna.

Just like the audio section when a speaker wire is disconnected sometimes the wire or trace going to the bottom of the antenna can become disconnected or broken. To check this bring a good transmitting radio very close to the one that hisses but does not hear the transmitting radio and see if any place as close as you can get the two radios causes the non-hearing radio to hear the transmitting radio. If so, then look for a problem with the antenna connection.

If none of these easy things bring the problem to heel then there's probably something amiss in the RF or IF receiver sections. If the radio has one or two chips that do all the work here then see if you can get both and replace them. I haven't even taken apart my own small FRS radios to see how complex the receivers are in these so I won't go any further than that since I simply don't know your radio.

I hope that helps.

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1 Answer

MT1500 shows full battery but beep's like it's dead


Hello
This double beep tone you are hearing is a acknowledgment tone indicating that the radio is in the transmitting mode. On the Motorola MT1500 radio you can adjust the tone volume separate from the reception volume by simply holding down the volume control and setting the tone volume level.
I hope this helps.
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1 Answer

Loud squeal/feedback noise when transmitting from a Kenwood TK-3230 to a TK-3400U4p


If you're close enough to hear the receive on one radio while transmitting on the other, it's good old-fashioned feedback. Turn the volume down on the receiving radio.

Jul 11, 2013 | Radio Communications

1 Answer

Turned up full volume u can only just hear sound if ear right to it was working fine then the volume just ******** out


It could be the mic plug. uniden is known for the issue where the wires inside the mix plug break at the solder joints.

When the RX wire breaks, you will loose receive because the radio will not go into receive mode. But you can usually hear it ever so slightly if you crank the volume.

Other issue that may cause this. No radio activity, (unless you hear radio activity low and not static)

poor feed line or antenna.

I would try a different mic that is known to work.

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1 Answer

Walkie talkies model gmr325-2 ic;513C-UT914 HOW DO I GET THESE TO TRANSMIT, MY HUSBAND HAS CANCER AND WE NEED THEM IN OUR BEDROOMS AND WHEN I AM OUTSIDE, TK U, TK U


In order to get the most out of your new radio, read this reference guide completely before attempting to operate the radio.

Turning the Radio On and Adjusting the Volume

1) Press and hold the key to turn the radio ON.

2) To change the volume level press the volume/monitor up or down key to increase or decrease the volume level.

3) Press and hold the key to turn the radio OFF.

Adjusting the Sound (Key Beeps)

Your radio emits a beep each time one of the keys (except for the PTT button and call key) is pressed.
The sound of the Key Beep will increase or decrease depending on the volume level setting.

To turn OFF this beep:

Press and hold the call key while turning ON the radio.

To turn ON this beep:

Turn the radio OFF and ON again.

Choosing a Channel

Your GMR325-2 radio has 22 channels you can use to talk to others. In order to speak to someone,
each of you must be set to the same channel.

To choose a channel:

Press the channel/scan up or down key to increase or decrease the channel number displayed.

Channel Scan Feature

Your GMR325-2 radio has a channel Scan feature that allows you to easily Scan all 22 channels. When an active channel is detected, the unit will pause on that channel until the channel is clear. Then after a 2 second delay, the unit will continue scanning.

Pressing PTT button while the Scan is paused on a channel will allow you to transmit on that channel.

To turn ON channel scanning:

Press and hold either the channel/scan up or down key. The channel number on the display
will rapidly cycle through the channels.

To turn OFF channel scanning:

Press either the channel/scan up or down key.

Talking on Your Radio

To talk to others using the radio:
1) Press and hold the PTT button and speak in a clear, normal voice about 2-3 inches away from the microphone.

While you are transmitting the tx icon is displayed. To avoid cutting off the first part of your transmission, pause slightly after pressing the PTT button before you start talking.

2) When you are finished speaking, release the PTT button.You can now receive incoming calls. While receiving, the rx icon is displayed.

Transmitting a Call Alert Tone

Your GMR325-2 radio is equipped with a call tone that will be transmitted when the call key is pressed.

To transmit the call alert tone, press the call key.

The tone will automatically be transmitted for a fixed length of time.

Auto Squelch Feature

The GMR325-2 is equipped with an automatic squelch system which shuts off weak transmissions
and unwanted noise due to terrain conditions or if you have reached your range limit.

Monitor Mode Feature

Your GMR325-2 radio allows you to listen for weak signals on the current channel at the press of a key.

To turn ON monitor mode:

Press and hold the volume/monitor up or down key. The rx icon will blink.

To turn OFF monitor mode:

Press the volume/monitor up or down key. The rx icon will stop blinking.

Automatic Power Save Feature

Your GMR325-2 has a unique circuit designed to dramatically extend the life of the batteries. If there is neither transmission nor an incoming call within 2 seconds, your radio switches to the Power Save mode. The radio is still able to receive transmissions in this mode.

KEYLOCK ON/OFF

Press and hold the call key until the "L" appears. After 1 second, the LCD will return to the channel display.
To exit Keylock on mode, press and hold call again.

Note: While in keylock on mode, it will still receive transmissions.

ROGER BEEP

Roger Beep is a BEEP that is sent to notify the end of transmission.
Roger Beep can be heard through the speaker when Key Beep is on.
Roger Beep is transmitted even if key beep is turned off. However Roger Beep will not be heard from the speaker.

To turn OFF Roger Beep: Press and hold the channel/scan up Key while turning on the radio.

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1 Answer

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Hello..if you can try to connect a external speaker or phones..if the volume is ok..than i think it is time to replace your internal speaker..pse tll me....good luck...Ron

Mar 14, 2008 | Midland 75-822 40-Channels Handheld CB...

2 Answers

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Do you hear the Beeps on the speaker? Check for the QT and the code squelch are the same in both radios, try to set code squelch in "0". Make sure that the radio is not receiving or the other one is not transmiting, with two radios will see the same.

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