Humming and calls not going out but can receive calls gp340

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

Typically you plug in the cable to either radio, turn to channel 1 and talk into one, than turn to the highest channeled and try the same.

defect ptt buttom

KNOWING ABOUT MOTOROLLA DEVICES

Motorola devices produce effects as one way communications. For example, device gets powered on from where user selects frequency transmission. User transmits entirely until receptacle device receives messages also replaying entirely until acquired. During the entire transmission processes, each entities waits to receive messages least expecting to transmit simultaneously. Motorola device are one way methods of sending messages also was an old fashioned method compared with recent telecommunications devices. Ascertain that a frequency has been determined from where message would be transmitted. Waiting for the receiver to reply confirms that message was transmitted. Usually with Motorola devices, alternate devices from where reception is captured waits to capture an impression. In a situation that the alternate device at an elsewhere location least transmitted a reply, reset several transitions frequencies to capture an impression as distress call from any alternate device that recognizes the caller at a frequency least prior determined.

WHAT IS EXPECTED FROM MOTOROLA DEVICES

Ascertain that the entity from where the message is derived has alternate methods of producing messages. For example, in a situation that the entity with the receptacle has another transitions device capable of being captured by the Motorola device makes an impression. For example, prior to calling contacts with the Motorola device, another entity that has means to transmit to the device being observed is heard. Ascertain that the device is capable of transmitting at several frequencies. A distress call from another device is captured from the device that has turned a frequency being transmitted distressfully. Ascertain that the caller is from a recognizable contact. In a situation that the caller is least recognizable least requiring any distressful condition requires to tune to frequency from where a recognizable entity can be captured for communications.

The most frequent cause of a "humming noise" in electrical components is called a "ground loop". If you want an indebth discussion of just what this is, you may go to this link:

http://en.wikipedia.org/wiki/Ground_loop_(electricity)

If, on the other hand, all you want to do is stop the humming, you may be interested in the discussion here:

http://forum.ecoustics.com/bbs/messages/1/130397.html#

No need for me to reiterate all that is said in the above discusssion. Try all of the suggestions made. Good luck.

FixYa is having some problems with internet links so you may need to copy and paste the links into your browser.


Hope this helps.

If your GP340 is a UHF model, YES, you can have it programmed to match your TalkAbout radios. And yes, the GP340 has programmable privacy code capability.

If you do not know if your GP340 is VHF or UHF, you can tell by looking the model number, it will contain the following pattern: __H25RCC4AN3__. UHF models will have the letter R after the "25". VHF models will have the letter K.

When you have your GP340 programmed, the power setting will need to be turned down to the appropriate level to match the TalkAbout radios. Both for legal reasons, and also to protect your TalkAbout radios. You will not want the powerful GP340 to overpower the PA (power amp) in your TalkAbout radios.

If you need to re-program the GP340's here is a link to some software on Ebay. You would need to buy a cable to connect the radio to the pc, but these cables can be found on Ebay also.

Low humming sound is invariably the ripple of the AC mains supply breaking through.
Sometimes it is radiated from nearby wiring, sometimes it is caused by a hum loop and sometimes it is an indication the capacitors in the power supply are failing.

May be the problem is the ROM the radio will need reflashing, remove the eeprom memory then tray again if the problem persist, the ROM will need to be replaced and reflashed by a motorola depot