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CB Antenna Placement

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04 Mar 2020 10:41 - 04 Mar 2020 11:42 #219366 by furo
CB Antenna Placement was created by furo
Hi folks,

I have just installed a CB in my Jimny and I am trying to work out the best location for the antenna. I thought I could attach it to my roof rack (yellow arrow) and run the wire through the aerial mount and down the A pillar, but I wasn't sure if I'd get interference from the radio aerial/cable and if the roofrack would be a suitable ground. I have read quite a lot of conflicting information.

EDIT: I have also thought about directly replacing the radio aerial with an antenna, and going without a radio.

Thanks!


2004 Jimny Mode: General Grabber AT3s (215/75/R15); Trailmaster 2" Lift; Jimnybits Snorkel; Jimnybits Front and Rear Recovery Points; Suntop Roof Rack; AVM Manual Hubs; Stainless Steel Exhaust System (SOLD)
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Last edit: 04 Mar 2020 11:42 by furo.

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04 Mar 2020 14:36 #219373 by gusthegorilla
Replied by gusthegorilla on topic CB Antenna Placement
Get something like this from eBay, and your CB aerial will perform both functions.....AND they do work !!

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04 Mar 2020 15:01 #219376 by DrRobin
Replied by DrRobin on topic CB Antenna Placement
The middle of the roof would be best. However, on the roof rack will be fine if there is a good earth. I buy self adhesive copper tape (slug barrier tape), this is very condutive, remove some paint from the roof rack and under the fixings and tape over for a really good earth. Seal it up afterwards with some electrical or self amalgamating tape.

Mag mounts work really well, even though they don't have a direct electrical connection to the roof, they are in close contact to still get the roof working as a good ground plane.

2020 blue SZ5 (one of the last to be registered in the UK)
Ex 2011 Blue Jimny SZ4
Northumberland Jimny Blog

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04 Mar 2020 17:49 - 04 Mar 2020 17:52 #219381 by Max Headroom
Replied by Max Headroom on topic CB Antenna Placement
I'd second Gus' solution - it's a long time since I had a CB radio but I had a similar device which worked well.
I've also used mag-mounts very successfuly - my only question would be could a mag-mount get knocked off by tree branches etc - I know the mag moounts are very strong, but could imagine this happening


IF IT AINT BROKE, KEEP FIXING IT UNTIL IT IS
Last edit: 04 Mar 2020 17:52 by Max Headroom.
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04 Mar 2020 18:02 #219385 by yakuza
Replied by yakuza on topic CB Antenna Placement
Mag mounts fall off from branches. So much I do not bother with it anymore. But they work fine otherwise. When installing antenna directly on the roof metal it is best to have 20cm of plane metal around if possible.

Norway 2005 Jimny M16A VVT, 235 BFG MT, 2" Trailmaster, ARB rear lck, 17%/87% high/low gears.
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04 Mar 2020 20:07 - 04 Mar 2020 20:11 #219389 by furo
Replied by furo on topic CB Antenna Placement
Thank you very much for your replies, that is very helpful.

Gus: that looks great, I think I'll get one of those!

One further question: the current aerial doesn't appear to have a ground, will I need to create one? I could connect a wire from the aerial to the bolt that secures the mount to the car (yellow line). Unless that is already built in?


2004 Jimny Mode: General Grabber AT3s (215/75/R15); Trailmaster 2" Lift; Jimnybits Snorkel; Jimnybits Front and Rear Recovery Points; Suntop Roof Rack; AVM Manual Hubs; Stainless Steel Exhaust System (SOLD)
Last edit: 04 Mar 2020 20:11 by furo.
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