20 Most Recent
Cobra 29 LTD CB Radio Questions & Answers
Swr meter not moving
follow these steps to adjust the
standing wave ratio(SWR).
1. Turn on the CB.
2. Set S/RF/SWR/CAL to CAL.
3. Key the Mic and rotate SWR CAL so the meter points
to CAL.
4. Unkey Mic.
5. Set S/RF/SWR/CAL to SWR.
6. Key Mic again and note the actual measurement on
the SWR scale. Refer to the following table to interpret
the reading.
1:1 - 1.5 Great
1.5 - 2:1 OK
2:1 - 3:1 Not So Good
Higher than 3.1:1 Terrible
What would cause my cb to blow fuses when u turn
d23 a 1n4004 diode second component from pa speaker port inside radio has failed. It is most likely that neg/pos polarity has been switched shorting this diode. It is there to protect your radio from reverse polarity as so it is names the "protection diode." 2 solutions first not recommended.
1. Cut the diode this will stop the directed grounding that is continuing to blow your fuse.
2. Go get a pack of 1n4004 and rosin core silver solder from radio shack and replace it paying attention to the direction it is installed.
just a side note the solder trace often burns in this area so a jumper wire soldered in around this bad area solder side maybe needed.
I can hear people talking, but they can't hear me, or they say I sound like an alien
Check to see if the meter needle is swinging backwards when you key up. If it does your final may be bad. If the needle goes forward and others say they see your keying up but no sound your audio chip may be bad; especially if you have tried so many mics and antennas. If your radio has a swr warning light and it comes on this could extremely limit your range and others may not hear you and contiued use will damage your radio. Good luck!!!
How do I turn down my power on my cobra 29
This is not a user-accessible function. You would need to take the radio to a qualified repair person, i.e., a CB repair shop
If the radio power output is 4-watts or less, as measured by an accurate wattmeter connected to a dummy load, then there is no need (from a legal perspective) for reducing it.
Replacing The Cobra 29 Nightwatch Illumination Panel
YOU CAN ORDER THAT PART FROM COBRA ELECTRONICS ON THE INTERNET YOU HAVE TO REMOVE THE FACEPLATE AND UN HOOK THE DRIVET INSIDE THE RADIO IT LOOKS LIKE A SMALL RIBBON CABLE THAT GOES TO THE FACEPLATE. SOME TIMES THE DRIVER ITSELF IS THE PROBLEM. MANY SHOPS JUST DO NOT WANT TO FIX THEM BUT I DO.
ICAN HEAR EVERYBODY BUT I CANT GET OUT I SWITCHED
You said that you can hear everybody and then you said all you can hear is static. Which is it?
If you can hear everybody and you have switched to a known good mike, then you either have a bad antenna or you have a bad final amplifier caused by a bad antenna or by having transmitted at sometime without an antenna at all.
Cobra 29 ltd Classic no
Check speaker and plug external one in if you have it.
swap mic could be a broke wire or bad switch in handset.
check antenna and coax connections.
i know checks sound basic but they could save you a lot of headaches later
How do I wire a MIC on a Cobra 29 LTD classic 4 pin mic?
would need to know the mic wire code you going to use. but half moon cut out at top as you look at it is top left 1-4 next row left side 2-3. 1 is cable/ unshield (common). 2 is MOD 3 is TX 4is RX... 1 is wire with no cover 2 is with cover rapped round wire RX is received TX is transmit, hope this helps. newer mic have different code wires so check with meter, red green and blue and shield is on some of the new wiring.
No audio Transmit
Try a hand mic with the set, there may be a short within the radio.If not your problem is with the audio amp in the radio itself.Repair should be about $15.00.
I have a Cobra 29 LTD with Bluetooth. I have no
if the antenna warning indicator is lighting during transmission then
the antenna is either located and.or installed improperly or a defect
exists in the antenna mount or the feedline itself, including
connectors.
Not finding what you are looking for?