Question about Uniden Hand-Held VHF 2-Way Marine Radio
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Posted on Jan 02, 2017
SOURCE: Push to talk problem
If indeed radio #1 has a mic problem, this may be confirmed by trying an external speaker/microphone plugged into the accessory jack. If still a no, then its not the mic but possibly the modulator circuitry. If there is transmit audio with the external mic and hence internal mic is defective, the unit would have to be pried open and the defective component replaced. The internal mic is normally an electrofet 2-3 terminal soldered to a shielded wire and physically attached to the front plate.
Alternately, another possibility is that radio #2 has its Interference Eliminator Code enabled/activated. This is indicated by the presence of small sized digits on the top right of display. If this is the case and no similar digits are displayed in radio #1, then radio #2 will not allow any received transmission to be heard. Along the same line of reasoning, if the code is activated on both radios signified by the presence of the 2 small digits, and radio #1 has a problem with its CTCSS (code) generator, then it would also prevent reception of radio #2. A way to verify this is by deactivating/disabling the Interference Eliminator Codes on both radios.
On certain occasion, it is also possible that radio #2 has a defective speaker. You should be able to verify this by plugging in an external speaker to the accessory jack of radio #2.
Hope this be of some help/idea. Pls post back how things turned out or should you need additional information.
Good luck and kind regards.
Posted on Nov 10, 2007
AFAIK, this is only possible when you have the headset plugged in. The headset allows VOX operation (voice operated transmission). If there is nothing plugged in or the handset is plugged in, the VOX setting is automatically switched off.
You can adjust the sensitivity of the mic so that it will start transmission only when a certain sound level is exceeded. There is a tiny lag between when it detects the sound and when it starts transmitting.
Posted on Dec 27, 2008
SOURCE: My UH043SX-2 seems to be
We have 6 of them all with the same problem. Uniden says to turn off holding down the mon and scn buttons. Then hold down the mon and scn buttons together for 20 secs. Then turn on holding down the mon and scn buttons at the same time. Then turn off and turn on again. This should clear the problem. It didn't for me so I threw them away and bought some more. I think that would have been easier than all the other stuff!
Posted on Oct 27, 2012
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