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The further you get the antenna feedpoint away from the ground plane the more problems you will have with matching and overall performance. The bracket that holds my antenna out away from the bed rail is about as far as I would want to get away from the flat top bed rail. The ideal place would...

I'm using a Laird trunk lip mount like this but found some new in package on eBay for $20 each. https://www.ebay.com/itm/372423892527?hash=item56b6319e2f:g:GukAAOSwRJ9ghy58 The Laird is very good quality commercial stainless steel mount and so is Larsen and a few others. I suspect Midland is...

The hood is a better location for tuning the antenna and all around performance. The rear bed rail will not work with all antennas due to the compromised ground plane and a UHF/GMRS or the COMPACtenna are proven to work ok. CB is out of the question without some huge effort in antenna matching.

I don't usually do low profile antennas except for a few models of the COMPACtenna, which can work better than a full 1/4 wave whip in some cases. I have two NMO trunk lip mounts on the hood near the hinges and do a lot of 2m and 440 amateur with some occasional GMRS. My main antenna is a large...

I think more people should read this and spread the word, friends don't let friends use low pillar mounted ghost pud antennas.

Go to post #116 here, I mention the kit # for a Mojave and show where I put the schrader valve on my rear bumper with some install tips. https://www.jeepgladiatorforum.com/forum/threads/airlift-rear-bag-system-info-you-need-to-know.28205/page-8#post-785440

I have a Mojave which has a soft suspension with reduced towing capacity and added Air Lift 1000 bags to my rear springs. The bags really stiffen up the suspension and allow me to level out the truck with heavy loads. They don't increase the weight capacity but do make everything better when...

I have a couple of radios in my JT and have tuned in all kinds of stuff from HF to CB to 2m and 70cm amateur and GMRS and have had zero interference from anything when the engine is on or off. Spark plug noise will be most prevalent at HF and CB and rarely goes into the UHF region. My JT is...

If the interference is coming in on a specific channel and the rest are clean then its probably not the power leads and its being picked up by the antenna. This is where a mag mount or other antenna can be used as as a probe to sniff out the source.

The Larsen Tri-band is advertised as a 1/4 wave unity gain on each of its three bands and its 16.5" tall not 19". 19" is not 5/8 wavelength on 462Mhz its more like 15" if your talking a single band UHF 5/8 wave antenna but that gets shortened to about 10-11" due to the single turn matching coil...

The Larsen Tri-band is a 1/4 wave equivalent on VHF/UHF and 800MHz and is actually a little worse than a full size 1/4 wave on any given band. I have several. An actual UHF 5/8 wave is a slight improvement over a 1/4 wave whip and even more over a short stubby and its not all that big, maybe 10...

Disconnect the antenna to see if that is how the interference is getting to the radio. Antennas do not cause interference, cheap or otherwise. If the interference is being picked up by the antenna a better antenna should pick up more interference.

Looks ok but I would get that antenna up in the clear. You could probably get away with a trunk lip mount between the hood hinges as the antenna is short and should not block any view out the front windshield. Your range would be improved in all directions.

Congratulations! A lot of people are not willing to put in the work required to find the problem and you did.

Coax is like a garden hose in most cases, it doesn't matter if you coil it or criss cross it or whatever, the antenna match should not change. The only time it will is when the coax is a radiating part of the antenna which can happen at HF or CB where there is insufficient ground plane and RF...

No, its the antenna , its surroundings or pinched coax or improperly installed connector, etc. If you can remove the antenna and mount do that and temporarily stick the antenna and mount on top of the hood with a good ground plane under it and test again. In this case the base of the antenna...

What kind of antenna? Try channels 8 through 14, they should be in the 467MHz range. If the match is worse there then the antenna is too long, if its better then it could be too short. If there is little or no change between the 462 and 467 channels then it could be lack of ground plane or...

A single ferrite bead does nothing for RFI on cables you need enough in series to get well over 500 ohms choking impedance and preferably over 1,000 ohms or higher. At VHF or UHF three snap on types of a #43 mix will usually make a noticeable difference or two to three winds of cable through a...

I have two radios in my JT now and put two speakers stuck to the ceiling above and behind the drivers seat using super heavy duty claw type velcro. The speakers are small rectangular units about 4X2X2" and left over from older Motorola cell phone adapters. I find the speakers mounted right...

I found on iPhones you may not have the latest firmware even if you have auto update turned on, you have to go into settings and tell it to check.