Question about Connex 3300 240-Channels Base CB Radio

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Transmitting problem when i key up to transmit radio squeals and transmit light flashes back and forth and buzzes, and when i unkey i lose all reception.

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You are connected to a power source that is inadequate, possibly a poor ground in the vehicle or an underrated power supply if using as a base. Oxidized connections on the fuse or fuseholder may also be the cause.

Posted on Sep 05, 2008

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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

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Uniden pc-122 keyed up when turned on & won't


I DON'T THINK ITS THE MICROPHONE , i THINK ITS IN THE RADIO ITSELF FROM THE MIC PLUG TO THROUGH THE RESISTORS ,DIODES,AND OTHER COMPONENTS. check the transmit circuit and see if the problem lies with in it.Audio chip,the main IC itself and all the diodes caps and resisters along the line .

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Flashing red light on radio where it thinks its recieving. Transmits fine but does not recieve.


Three things come to mind:
1) The radio is receiving, hence the light, but you may have a different PL code than the other radio and it is muting the transmission. Check your programming to be certain both radios are programmed alike. The red light indicates activity on your frequency.
2) Your radio may have a problem with the receive side of the radio or a bad speaker.
3) The transmitting radio may have a problem with transmit. This can be a sign of a bad battery. Swap batteries and see if the problem moves to the other radio. If so, replace the battery. (It takes more energy to transmit than to receive, so loss of transmit is common with a bad battery.)
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When transmitting it has a loud squealing noise, it is so bad that i had a problems getting a radio check. HELP


What you describe sounds like feedback ... a contition that exists when two radios are on the same freq and close enough that the signal is re-transmitted as it travels from the speaker of one to the keyed mic of the other. This is a shot in the dark ... can this be the condition you are experiencing?

Thanks for visiting FixYa.comm today.

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My galaxy 959 sqeals and does not receive or


mike has wiring problems. Check for breaks in cord and where the plug goes into the unit. If not original mike then has incorrect wiring for the radio and will need to be changed for config

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Hisses/squeals when transmitting


Check the input voltage into the radio while in transmit. The voltage maybe dropping as you go into transmit which causes it to drop into receive. That in turn allows the voltage to come back up. With your finger still on the PTT it tries to transmit again, etc. This could cause a feedback squeal and other symptoms.

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I have never seen this problem before, check if the VOX is activated, this could cause to transmit the radio, but the voice must be transmited. check if the Accesory connector is not dirty, clogged or damaged

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