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screwystewy 01-01-2013 07:44 PM

Cb help!!
I just bought a cobra 29 lx cb, bought a new cord, and my antenna is less than 6 months old its 2 feet tall and made by a company call problem is when i key the mic it flashes cb antenna warning..and i can hear others but i dont know if they can hear me..also the meter on the bc is showing a low signal..could a new
antenna fix this? Also im sorry for being blunt as i dont know much about cbs and habout cbs..t

screwystewy 01-01-2013 07:45 PM

Sorry for the bad typing my i phone app is being wierd

Patrick H 01-01-2013 07:49 PM

Well, first off we need to know what your SWR is. I tried a 2' antenna, and while I could tune it to be "OK", it's bandwidth was too narrow to effectively adjust it with it mounted where it was.

jasonduke5 01-01-2013 07:49 PM

Sounds like your SWRs are off.

Jerry Bransford 01-01-2013 07:51 PM

That is very likely being caused by the antenna being improperly mounted and/or a high SWR from not having been tuned (by adjusting its length) after being installed. A common problem is the antenna mount having been improperly assembled so it is shorting the antenna to ground. A high SWR (standing wave ratio) simply means the antenna isn't working properly... like from not having been tuned yet or from being improperly mounted.

It doesn't sound like you are technical on such things, I'd probably take it to a CB shop or truck stop that has a CB guy in their CB store. They can probably figure it out in a few minutes.

But if you want to try to fix it yourself, take a good sharp close-up photo of the antenna mount from the top & bottom and post it up here. Seeing if the mount was properly assembled & mounted will be a good start on determining the problem.

screwystewy 01-01-2013 08:31 PM

3 Attachment(s)
Attachment 193402

This is how i had my mount and antenna before and it didnt work

Attachment 193403

Moved it to the passenger fender which is where i wanted to keep it..had the sticker behind it just trying to see if maybe the mount was shorting out or you can see i dont know much about cb's

Attachment 193404

What my cb is saying when i key the mic

dolson60174 01-02-2013 01:39 PM

looks like a grounding issue. make sure where those mounting bolts are mounting on clean metal. I had a similar issue with mine and it was all about the grounding...

Jerry Bransford 01-02-2013 02:02 PM

Do a continuity test between the mount that is bolted to the tub and where the antenna screws into the top of the antenna mount... that hex-head bolt part that is sitting on top of that white nylon insulating washer. There should be zero continuity (no electrical connection) between the antenna mount bolted to the tub and the base of the antenna where it threads into the mount.

Or unscrew the antenna, then loosen the mount & make sure that nylon insulating washer is properly centered in its mounting hole, not broken, and is preventing the mount from touching the mounting bracket as it must do.

That your CB is giving you that type of warning is indicating a fairly serious problem that is typically the antenna mount is causing the antenna to be shorted to ground via an improperly assembled mount. The photo makes me think the mount is assembled properly but perhaps the insulating washer isn't centered properly in the hole so it can keep things separated as it is supposed to.

screwystewy 01-02-2013 05:10 PM

1 Attachment(s)
Jerry i took apart my mount and it has the little washer

Attachment 193725

The washer looks fine no cracks and is seated in the hole it possible that the antenna is bad itself? I bought everything new at the beginning of summer..and a buddy of mine gave me an older cobra that got me threw the summer..the only problem was it worked fine whenever i was talking to my group very close to me but if i was lets say 1 mile away they could hear me but i couldn't hear them..i just thought it was the old junk cb but could it be the mount or the antenna all along??

Jerry Bransford 01-02-2013 05:36 PM

I doubt the antenna itself is bad, whip-antennas are pretty stupid-simple & not much usually goes wrong with them. I'd probably look for a local guy who knows/understands CBs & antennas. There's not much else to check if you don't own or familiar enough with a meter in order to do some basic electrical troubleshooting. At this point I'd look for some local help, perhaps a CB shop or truck stop that has a CB store inside.

screwystewy 01-02-2013 06:02 PM

I went over to radio shack and bought one of those magnetic whips just to see and it now works! So its gotta be something with the antenna or base..i got ahold of a cb shop thats gonna get it set up for me tomorrow..ive also been told about them boosting your watts is that something i should have done?

Jerry Bransford 01-02-2013 06:10 PM


Originally Posted by screwystewy (Post 3174228)
...ive also been told about them boosting your watts is that something i should have done?

No. Not only is that highly illegal here in the U.S., it's not something that really typically helps. You would have to double the output power of the CB for it to even be noticeable by the person receiving you.... not to mention you'd likely not hear them reply if they were running legal power.

screwystewy 01-02-2013 06:17 PM

Ok then ill for sure stay clear of doing that last question for you im just gonna go ahead and buy a new mount and antenna tomorrow is their any brands or certain antenna that is a quality antenna?

Jerry Bransford 01-02-2013 07:36 PM

I'd go for either a Firestik FS-2 (2') or a FS-3 (3') antenna which works well on a Jeep. Like this one... Firestik FS-FL-3 Firestik Mobile Tunable Tip Flexible CB Antenna Black FSFL3. Firestick antennas are fairly stiff fiberglass antennas which means they don't sway & whip around excessively on bumpy trails like some other antennas do. The FS series of antenna is also tunable via a threaded brass screw under its top vinyl tip cover which makes the tuning process easier than some other designs.

I currently use a Firestik FS-2 after my the FS-3 got too tall to clear my garage door after moving its mount to over the tail light. I was pleasantly surprised the 2' tall FS-2 works fine on the trail, I don't miss my old 3' at all.

For the mount, a standard heavy-duty stud mount like at Accessories Unlimited CB6 AUC6 SO-239 - 3/8-24 Threaded Antenna Mount is a good type to use... it's also about the most common type so you shouldn't have any trouble finding one.

screwystewy 01-02-2013 07:51 PM

Ok ill be placing an order tonight for these..thank you jerry for your time, advice, and knowledge i Appricate it!

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