Question about Cobra 29 Lx Full-featured Cb Radio
I think it could be with the coax.try replacing the coax and the antenna and see what you get. make sure the antenna is adjustable with set screws.
Posted on Nov 25, 2014
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Posted on Jan 02, 2017
You need to shorten the antenna,adjust the whip all the way down and see what you have and then cut off 1/4" at a time remember this low on 1 high on 40 it needs to be lengthened high on 1 low on 40 it needs to be shortened . I hope this helps and good luck.
Posted on Apr 12, 2009
check the squelch by turning all the way both ways. check the external speaker socket. if it is the swicthing type it could be either bad conntact or dry joints. try an external speaker to see if that works. another thing is I believe it wont work if the microphone is not pluged in or connection fault there. Good luck.
Posted on Jul 25, 2010
Hi, my name is John. Welcome to FixYa. Check your antenna, you need to set it with a real SWR meter, pick one up at any near-by CB shack $10.00. Thanks for choosing Fixya...John
Posted on Nov 23, 2010
SOURCE: Have a new cobra 29lx. Everthing works fine except for the SWR meter. Can't use the meter to adjust SWR. No matter what I do the meter stays the same. Sent to factory but they said nothing was wro
The SWR cannot be changed by rotating this knob. The SWR function allows you to determine the SWR or "match" of the antenna system and transmitter on a specific channel. The entire process must be performed whenever you want to know what the SWR is on a different channel. The SWR/CAL button toggles the meter between the CALIBRATE and SWR modes.
Set the radio to CH1. Press the SWR/CAL button. The radio CAL(ibrate) mode is now selected. Press and hold the mic PTT (or push to talk) button. Rotate the SWR knob as needed to adjust the meter indicator until it is on the SET mark on the dial. The meter is now calibrated for this channel.
While still holding down the mic PTT, press and release the S/RF SWR CAL button to the SWR setting to read the SWR on the meter.
This entire process should be done for Ch 20 and Ch 40. You must go through the CAL procedure for EACH channel before attempting to read the SWR.
Changing the SWR requires that the antenna be lengthened or shortened until such time that the SWR can be reduced no further. Typical SWR across the band may be:
CH1 - 1.5:1, CH20 - 1.1:1, CH40 1.5:1
CH1 - 2.2:1, CH20 - 1.7:1, CH40 2.3:1
The "dip" in SWR on CH20 is typical, as the antenna is the perfect length on only one channel - it will be come slightly too long or slightly too short as you tune up or down from CH20. The further away from CH20 you go, the poorer the SWR will be. You can "slide" the dip to any channel you prefer - say CH8. If you tune for lowest SWR on CH8, You might see CH1 with a 1.2:1 SWR, CH8 at 1.1:1 SWR and CH40 at 2.5:1. All are acceptable - sort of. Many manufacturers say up to 2.5:1 or even 3.0:1 matches are ok, There's no reason a quality antenna can't be tuned for optimum SWR in the middle of the band (CH20) to have less than a 2.0:1 SWR on CH1 or CH40, unless there is a ground issues or bad cable / antenna / connection somewhere.
You can view the manual here. I hope this helps & good luck!
Posted on Dec 03, 2012
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