New Tram Browning Black 1246-B Trunk Antenna Mount NMO With PL-259 connector and 17Ft of RG-58 Coax Cable

Have not been having very much luck with getting the results listed in the Ads for mounts or antennas for that matter. This one seems to be an exception.I am giving four stars because I did feel the need to make the grounding correction one of the other reviewers mentioned for this mount to remove some of the enamel from under the screws holding the NMO mount to the bracket. Not sure if that impacted my results because I did not test it before, but after looking at it the modification just made sense.That being said, I did pair this mount with the Tram 1126B antenna. I have to say that once installed I am getting 1.0 to 1.2 SWR throughout the GMRS frequency range. I am also hitting repeaters 20 plus miles away with strong signal return. Hopefully this mount will give you the same results.

Although I prefer a permanent NMO antenna mount, this trunk lid does the trick! Very easy to install, extra coaxial cable, and connector plugs right into the mobile radio. It sits nice and snug to the trunk lid when properly mounted. It's an alternative but works well for my purposes. Quality value at a reasonable price.

Great mount once you fix the set screws. The mount itself wasn’t thin enough to get through the trunk lid seam and had to mount it on the front (window side) of the trunk. The problem here was the set screws were so long they would have broken the window. After a few seconds with an angle grinder and file it worked fine. Wish they would have included shorter set screws instead of me having to work at it to get it to fit. Otherwise a solid mount and no issues once it was installed.

I installed this on the trunk of a 1999 Toyota Avalon. The bracket fit the trunk lip well and I made sure to expose bare metal where the two allen screws contacted the lip. I was planning on using this with a low band, base loaded whip (Browning BR-140-B) for the 10 meter ham band. Once installed, I attempted tuning the antenna using a RigExpert AA-55 antenna analyzer.That's when the trouble began. Out of the box the antenna should be resonant at about 26.5 MHz. In fact, the lowest SWR, about 2:1, was achieved at about 30 MHz. More troubling, the SWR changed erratically as the coax was moved while I sat in the car. That generally means the shield is radiating. That should not be happening. An ohmmeter check, with the antenna unscrewed from the NMO mount, indicated that while the threads on the nmo mount, to which the loading coil screws on, had continuity between the coax shield and the threads, there was no connection between the lip mount and any other part of the actual NMO mount. The lip mount should be connected to the coax shield so that the shield is electrically connected to the trunk when the two allen head screws are tightened down.Just for grins, I took some copper braid, and connected it between one of the allen screws, and then screwed down the loading coil on the other end of the braid so that I had the proper connectivity. Everything worked as advertised after that.So if this mount is causing you trouble, or you can't get your antenna tuned, remove the antenna and make sure, there's a dead short between the NMO threads and the allen screws. If not, there's the problem.

no

Great trunk lip mount. Have had it for over 6 months. Worked well for a bofeng setup and works well for my Wouxun KG-UV920 setup. I do not see any discoloration nor rust on it yet. It has been in the rain and works fine after.FYI 17ft is too long and if you use all 17 feet of coax you will loose a lot of power. I trimmed the coax down to 1.5ft long and mounted my rig in the trunk with the battery and my signal is much better. With 20W going through 17ft of this RG58 you loose 3-4 watts. I drive a typical sedan and 17ft was plenty to run the coax to the front with me in the driver's compartment, so I could have trimmed off a few feet but never did until I bought a real mobile rig.

Find and read the review with pics from Greg because his diagnosis was 100% on target and I experienced the same result, plus some extra frustration just to make me work harder.I ran a ground wire from the trunk lid to the body of the car had a solid 3 SWR across all 40 channels. I had read Greg's review and got the same results when I tested the base and decided to open the mount using a thin blade to peel back the round seal. I found that paint was preventing the antenna from getting a proper ground and followed his steps to scrape it away using the tip of a drill bit. SWR slightly improved to a 2.8 and grounding was no longer an issue, but my SWR was still dangerously high at 2.8.Next thing to test was the coax. Tram-Browning used RG58 which is popular because it's light, flexible and easy to run (translation - it's cheap), but the attributes that make it popular and very common are its downside because it is both fragile and lossy, with the loss made even worse by poor shielding. It's junk.It will work for most people unless it is stressed in any way and apparently I stressed it during the install, or perhaps it was defective out of the box. I had no issues running it behind the back seat and under the carpet but I did pull on it slightly.I checked continuity and the shield and center conductor both tested good, but my SWR was unacceptable so I replaced it with 12' of mini 8 coax from a truck stop. BINGO! My SWR is now perfectly flat from 1-20 and 1.3 on channel 40 which means I basically paid for the mount.I could have sent it back but I had one day to complete the install or wait at least a week for another opportunity.There is no reason a better quality coax couldn't have been used. On the plus side the mount is well made