I have a cobra Bluetooth model # ppr-rbt1 that will not transmit out and only picks up other people if there real close and only every now and then. When I key the mic the needle does not move. What can cause this?

What is the swr? This can impact the receiver. However, the tuning coils for receive and transmit are close to each other and someone most likely turned the receive coil instead of the transmit coil. The coils that are adjustable that affect receive are 13, 15 and 3. 3 is the coil that is close to the transmit section. You may want to have it realigned.

All radio's are factory set up and although you can tweak parts, this is usually at the expense of longevity or reliability.
To tweak a radio properly and ensure it remains legal, you will need the service manual, an accurate frequency counter and standard, a nice dummy load and an oscilloscope. If you turn anything inside and do not know what you are doing, you could end up stressing output components due to signal mismatching and possibly end up with spurious transmissions which can interfere with other electronic equipment.

Tommy, I know why you like the radio, but I must warn you that it isn't type accepted for the amateur band. (it would be the same thing as using an amateur radio for the fire department or sheriff for emergency uses.) I have looked for the mods to change it into a 10-meter radio, and they are not to be found. My suggestion to you is to look in a recent issue of QST about building a Bluetooth (c) transceiver for your regular 10-meter radio. I had to do the same thing for my HF rig which happens to be a Yaesu FT-857D. Fire me an e-mail if you want the schematics for the box. 73 and good luck!

if its still under warrentee then send it back to where it was made. If not send it to a place like Bells cb in Fl. or another reputable shop. Inquire with them before you send it to them and they will tell you how to send it.

What you are hearing during the day must be what is called "skip". Skip is active during the day where you will hear radio operators from hundreds of miles away. Their signal is bouncing off an atmospheric layer well aboe the earth's surface. At night this atmospheric layer degrades and then so does the skip. Unless there is someone close to your vicinity transmitting on the channel you are listening too, you will not hear much at all. Try changing the channels until you pick up a conversation.

Hi, my name is John. Welcome to FixYa. Take the cover off circuit board side, and with the eraser end of a pencil, touch around on the board trying to locate cold solder joints, have to look real closely and re-solder them....Thanks for choosing FixYa...John

do a google search for it.

security code 4 the ranger bluetooth ?? 0000 . all zeros..

Sounds like the PLL circuit....... no channel synthesizer will kill the transmit and receive...... bad crystal or IC could be at fault or if someone has attempted to add more channels could also be cause.

Make sure that the mike gain & RF gain controls are turned clockwise & the squelch is counter-clockwise.