Vehicle & Technical > Discovery

cb antenna ???

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landroverkeith:
I went for 2 truck type mirror mounts from Thunderpole on my roofrack, with the "trucker HD" ariel its a great setup for laning

brianb:
Ive got a mount that sits between the spare wheel and rear door mount, very strong and wit a mini sporinger on its no soo tall that it catches the trees etc.  I got mine from Ebay for about £17. 

Brian

redhand:

--- Quote from: Lyndsey731 on April 26, 2010, 08:35:37 ---I got fed up with the mag mount being knocked off by low branches and changed to a gutter mount above the back door.

Gav

--- End quote ---

Snap!   except mines a 6ft orbitor mounted to a stainless steel gutter mount  fitted to the right of the rear door, the mount has a adjuster knob on it that allows me to tilt the aerial towards the centre of the car if the lanes are very overgrown.

For greenlaning Antenna position really is irrelevant just so long as you can get a decent Swr reading. Absolutely anywhere will suffice.

Devon-Rover:
Range is merely the result of what SWR and power the rig is putting out. It isn't the fact of saying that i will put up with a poor SWR as i don't need it to be any better to talk to my mates.

A good SWR will mean for close convoy work you will be able to comfortably talk to everyone and should the distance increase you won't spend time swearing to yourself, as no one can hear you and the CB is as much use as a chocolate fireguard.

And yes the 'Orbitor' in the long or the mini variety is the choice for laning. (i have a mini on 90% of the time) But i do keep a meteor in the back and should i want a perfect SWR it is a 30second change over to swap Aeriel's. As for range i don't know as i haven't tested it. The worlds my oyster if the skip is right.  ;)

Saffy:
SWR has nothing to do with how well an antenna transmits or performs, a good SWR just means the antenna load is more closely matched to that of the radio, in this case ~50ohm.

Just to highlight that, a non inductive resistive load of 50ohm (i.e dummy load) with give a near perfect SWR reading yet is a very poor at resonating RF.

My suggestion for a greenlaning/convoy antenna is nothing more than a RF leaky (unshielded) dummy load capable of safely dissipating the heat from ~5watts of power. This can be put on the end of a length of coax and hung/hooked/stuck on suitable location inside the vehicle. The range will vary but should be satisfactory for a few hundred feet line of sight. No worrying about routing cable to outside of vehicle, no worries about tuning, no worries about trees, no worries about mounting and earthing brackets and mounts.

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