Cobra 29 LX ANTENNA Warning

[bailagent67]

Dear sirs

I have a 1 year old Cobra 29lx. Thats getting the Antenna Warning. My Stryker A 10 is about 4 years old.

I checked and cleaned of my radios ground.

Checked the guts of my A 10, nothing appears to e burnt or out of place.

Been through the Swr Calibration with the radio settings and a third party swr meter.

Im still getting the Antenna Warning. Although it turns off more with the radio adjustments.

I did buy a 50w dummy load, I just haven't used it yet. Dont really know how

Any tips?

 

[WSAC829]

The SWR warnings on the newer 29’s are set too low. Known issue with an easy fix. This assumes your SWR has been checked with an external SWR meter and is below 1.8 (under 1.5 is ideal). Open up the radio and adjust VR6 until just after where the warning goes away. Don't crank it up too far, otherwise the warning wont work accurately when there really is a problem with your antenna.

Here is a video showing where VR6 is. I advise not using a metal key or fuse like this guy did. Use a plastic tip screwdriver.

 

[bailagent67]

I seen that. My radio has the newer version.

I have to go into DUT mode on the display. Im actually in that right now. Im using the dummy antenna.

Now , i cant get it to adjust to 777 on VF , VR . I cant get a pic to upload. Says file is too big. Ugh.

 

[bailagent67]

I seen that. My radio has the newer version.

I have to go into DUT mode on the display. Im actually in that right now. Im using the dummy antenna.

Now , i cant get it to adjust to 777 on VF , VR . I cant get a pic to upload. Says file is too big. Ugh.

 

[bailagent67]

I think i finally got it. No more Antenna Warning display. Very low SWR across the board.

 

[damion2492]

The SWR warnings on the newer 29’s are set too low. Known issue with an easy fix. This assumes your SWR has been checked with an external SWR meter and is below 1.8 (under 1.5 is ideal). Open up the radio and adjust VR6 until just after where the warning goes away. Don't crank it up too far, otherwise the warning wont work accurately when there really is a problem with your antenna.

Here is a video showing where VR6 is. I advise not using a metal key or fuse like this guy did. Use a plastic tip screwdriver.

ive got an older 29lx and it doesn't have the VR6 antenna warning adjustment knob. do you know it theres another spot it could be or do i have a chinese knock-off? I did buy off fakebook from a local kid, who got it from his buddy. it does work great buuut, on the occasion that dreaded antenna warning come across the screen! swr was set with astatic pdc1 swr meter and were pretty damn good, below 1.5 on all channels! any info or suggestions greatly appreciated 👍

 

[WSAC829]

VR6 might be under the USB board at the back of the radio.
Otherwise you have to enter DUT mode if you have no VR6.

Here’s Cobra’s how-to with pictures.

Guide to Fix/Adjust Cobra 29LX Antenna Warning

The 29 LTD (and variants) have an antenna warning on the front panel as described below: On the 29 LX and the 29 LX LE, it will actually say “Antenna Warning” on the display On all other models there is an antenna light that is labeled “ANT...

support.cobra.com

 

[niceguy71]

Dear sirs

I have a 1 year old Cobra 29lx. Thats getting the Antenna Warning. My Stryker A 10 is about 4 years old.

I checked and cleaned of my radios ground.

Checked the guts of my A 10, nothing appears to e burnt or out of place.

Been through the Swr Calibration with the radio settings and a third party swr meter.

Im still getting the Antenna Warning. Although it turns off more with the radio adjustments.

I did buy a 50w dummy load, I just haven't used it yet. Dont really know how

Any tips?

have you been using the Stryker antenna and the Cobra 29LX for the last year without any problems???? funny it would just start doing that.... do you roll the window / or shut the door on the coax??? if so you can wiggle the coax where you close the door or window on it as you transmit to see if there might be a break with the coax.

 

[damion2492]

VR6 might be under the USB board at the back of the radio.
Otherwise you have to enter DUT mode if you have no VR6.

Here’s Cobra’s how-to with pictures.

Guide to Fix/Adjust Cobra 29LX Antenna Warning

The 29 LTD (and variants) have an antenna warning on the front panel as described below: On the 29 LX and the 29 LX LE, it will actually say “Antenna Warning” on the display On all other models there is an antenna light that is labeled “ANT...

support.cobra.com

ok thank you, greatly appreciated 👍

 

[damion2492]

VR6 might be under the USB board at the back of the radio.
Otherwise you have to enter DUT mode if you have no VR6.

Here’s Cobra’s how-to with pictures.

Guide to Fix/Adjust Cobra 29LX Antenna Warning

The 29 LTD (and variants) have an antenna warning on the front panel as described below: On the 29 LX and the 29 LX LE, it will actually say “Antenna Warning” on the display On all other models there is an antenna light that is labeled “ANT...

support.cobra.com

mine doesn't have Bluetooth so no USB board. I cant find anything else on adjusting the antenna.

 

[WSAC829]

Did you try option #2?

 

[damion2492]

Did you try option #2?

View attachment 189517

yeah I read that but im new to the cb world again so im not sure how exactly to do that. still educating myself. thanks for your help, greatly appreciated 👍

 

[bailagent67]

have you been using the Stryker antenna and the Cobra 29LX for the last year without any problems???? funny it would just start doing that.... do you roll the window / or shut the door on the coax??? if so you can wiggle the coax where you close the door or window on it as you transmit to see if there might be a break with the coax.

Yes, I used that combination for the last year. My antena coaxial does NOT go through the door. No kinks or smashed cable My cable go down the back window, and then up through the floor pan via the water plug.

 

[Davidbt]

Yes, I used that combination for the last year. My antena coaxial does NOT go through the door. No kinks or smashed cable My cable go down the back window, and then up through the floor pan via the water plug.

After I read your post, I crawled under my truck to look for access. I found a little cap in the floor under my back seat that worked out perfectly. It's on my fuel tank side of the truck and away from the exhaust.

 

[bailagent67]

Lol. Yep. Thats what i found. Just make sure of sharp edges, and seal it from water.