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Cobra 25LTD WX Classic: Transmits great. Recieves nothing. No squelch noise at all. Tried spare antena with no change.
Last week started getting occassional loud blast (very short) out of radio with everything turned off. ??? thanks Glenn in Monterey Ca.
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Check the squelch setting on the receiving unit. If it is set to low, this can happen.
Usually after receiving something, the receiver will stay unsquelched as the open and release points on most squelch controls is different. If you set the squelch a little bit higher, this will not happen.
Hi, my name is John. Welcome to FixYa. Try running your power strait from the battery, that will bypass a lot of your noise. RED (+) ground (-) . Thanks for choosing FixYa....John
That's usually a defective amc stage that produces RX audio and TX modulation. It's an integrated circuit that will require a tech fixing it. You will have a transmitted carrier with no modulation, and no sound in your speaker. However, make sure you have a good mike plugged in first, and substitute a known good mike to verify it's not the mike. With the WX band working, the above may not apply.
See if you have a carrier...signal going out, but no modulation. Get your Tech to check the mike wiring/circuitry inside the radio, also.
Its just RF feed back, that's normal, try to re-route the coax, or just turn the FM down, o try turning your modulation down....hope this was helpful....
COBRA RADIOS HAVE A DIODE THAT WILL BLOW IF HOOKED UP BACKWARDS, THIS IS A BLACK DIODE WITH A SILVER RING ON ONE END OF IT, YOU MAY HAVE TO TAKE IT TO A CB REPAIR SHOP AND HAVE IT REPLACED, HOPEFULLY YOU DID NOT USE OVER A 5 AMP FUSE
If the meter shows that it's receiving something, the microphone may be the problem. Another possibility is the speaker & plugging an external speaker in would confirm this. Aslo make sure the squelch control is turned all the way to the left (counter-clockwise) & the RF gain is turned to the right (clockwise).
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