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Hi just wondering if anyone knows anyone in Europe doing these mounts, as I don't want to wait for them to ship from the USA. Suppose I could make them but be nice to have something already fabricated.
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Rear Atenna Mounts
- Thread starter steverjuk
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Have you tried swapping your existing reversing bulbs with decent LED ones? Mine have made an amazing difference to the point I no longer want to mount something like you’re suggesting. Pretty cheap, 5 minutes to fit and totally inconspicuous.
Surely the ground plane on these must be horrible?
stumog
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Yeah I did that at the same time and decided not to fit until I really need to.
I am.no expert and not set my radio up yet. Happy yo take advice hear as no less then nothing on cb stuff.
I was working under the impression others fitted them.here so must be ok. Poor i know but all I have to go on
I think Shayne’s thread titled something like ‘I know nothing about CB’ has some reasonable info and links. Yes, folks do fit them there it’s true and it’s not a bad place aesthetically but from avrafio point of view the best is drilled through the middle of the roof and there’s not many of us want to do that thank you very much. There’s info aplenty on the net but basics are the base must be electricallyvattached to the body of the vehicle OR a decent metal surface to form the poking down bit (as every antenna needs to be a dipole of sorts I.E one leg up, one leg down). You can mount it there and it will probably work close range only.
Towpack
Well-Known Member
Design and performance of antennas is a fascinating subject. Books have been written about this one aspect of radio comms, by people well above my pay grade I might add!
In theory, mobile antennas shouldn’t work at all due to the obvious restrictions in size and lack of a “true” ground plane but they do, some much better than others but they are still very much a compromise compared to an ideally sited base station antenna. A good electrical ground of the mount to the vehicle body is a prerequisite. Many vhf/uhf and some hf antennas are designed with a radialless ground structure which means they don’t require radials round the base or indeed centre roof mounting to provide a “ground plane”. They usually have an impedance matching section (coil) in the base and work as off centre fed dipoles. Mounting any antenna on any vehicle is very much a suck it and see excercise. Realistically, the best you can hope for is a decent impedance match (low SWR), achievable at most mounting points on the vehicle, the radiation pattern and range being the most variable factor. I guess if your using CB for vehicle to vehicle comms in a relatively short convoy it’s not that big an issue.
In theory, mobile antennas shouldn’t work at all due to the obvious restrictions in size and lack of a “true” ground plane but they do, some much better than others but they are still very much a compromise compared to an ideally sited base station antenna. A good electrical ground of the mount to the vehicle body is a prerequisite. Many vhf/uhf and some hf antennas are designed with a radialless ground structure which means they don’t require radials round the base or indeed centre roof mounting to provide a “ground plane”. They usually have an impedance matching section (coil) in the base and work as off centre fed dipoles. Mounting any antenna on any vehicle is very much a suck it and see excercise. Realistically, the best you can hope for is a decent impedance match (low SWR), achievable at most mounting points on the vehicle, the radiation pattern and range being the most variable factor. I guess if your using CB for vehicle to vehicle comms in a relatively short convoy it’s not that big an issue.
