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Furo's Jimny Build

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22 May 2020 14:23 #222666 by jackonlyjack
Replied by jackonlyjack on topic Furo's Jimny Build
Are you using correct coaxial cable and a spliter box for radio

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22 May 2020 14:45 #222668 by furo
Replied by furo on topic Furo's Jimny Build
Thanks Jack! Yes I'm using a similar splitter and I bought that exact coaxial cable. A coaxial cable runs from the radio to the splitter, then another coaxial cable runs from the splitter up to the radio mount on the roof (which has a built-in ground). I had hoped to attached the antenna directly to the original radio mount but it didn't fit, so I got another coaxial cable and joined the radio mount to a homemade antenna mount (just some washers and a M6 bolt that the antenna threads onto). So the whole length is coaxial cable apart from the join in the original radio mount.

So far I haven't been able to properly check it with anyone else who has a CB, but one thing that concerns me is there is absolutely no difference in my FM radio quality if I screw the antenna on vs leaving it as just the bolt! I don't know what that means.

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.

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22 May 2020 14:47 #222669 by furo
Replied by furo on topic Furo's Jimny Build

furo wrote:


In this image you can see the bolt in the radio mount, to which I have attached a further length of coaxial cable. The cable runs to a bolt in the roof rack that I screw the antenna onto.

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.

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22 May 2020 14:56 - 22 May 2020 15:03 #222670 by jackonlyjack
Replied by jackonlyjack on topic Furo's Jimny Build
Sounds to me like you have made a direct short
between the centre core to the braid by going onto a bolt
they need to be separated by this kind of connector
www.thunderpole.co.uk/rf-plugs-connector...rg223-h155-type.html

this is the mount i use
www.thunderpole.co.uk/fixed-body-mounts/...stick-mount-kit.html
Last edit: 22 May 2020 15:03 by jackonlyjack.
The following user(s) said Thank You: furo

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23 May 2020 12:54 #222734 by furo
Replied by furo on topic Furo's Jimny Build
Thanks Jack. I was careful to fold back the braid and used heat-shrink over it, so I don't think it has shorted with the centre core.

If the whole thing is disconnected I only get static on my FM radio. If I connect the cable to the roof rack without an antenna I get reasonable signal. If I add the antenna the signal is unchanged. So is the whole roof rack acting as an aerial? Sorry if these are stupid questions. Do I need to make sure the antenna is isolated from the roofrack?

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.

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23 May 2020 14:20 #222739 by jackonlyjack
Replied by jackonlyjack on topic Furo's Jimny Build
Should be connection from the braid to rack
No connection from centre core

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23 May 2020 18:58 #222755 by furo
Replied by furo on topic Furo's Jimny Build
Ah right, I didn't realise that, thanks! I'll have to think about how to do that.

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.

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25 May 2020 15:59 - 25 May 2020 16:24 #222812 by furo
Replied by furo on topic Furo's Jimny Build
Thanks for the CB advice so far. My radio wasn't set to the UK, so I changed that, and I put in a rubber grommet to separate the antenna from the roof rack. I haven't worked out a way to neatly connect the braid to the rack yet.


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.
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Last edit: 25 May 2020 16:24 by furo.

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