Alternative Antenna

GeorgeC wrote: Edit: While waiting, I opened the manual and found there are Three different Radio Systems for the 2019 Jimny! Each of these will have different antenna requirements, however, all three would benefit from a "lay flat" feature.

Can you post that documentation?

But the threads are the same on those?

Good, wanted that confirmed.

Then we are at the antennas. Their length is based on the radio net (and the freq.) that used in the country. FM has always been a good standard. But I digress.

A frequency range is reserved for the service, and the antenna is made to cover that range. Now, a full length antenna for that range is scaled 1/1. You can choose shorter antennas for that range, as long as they are dividable by 2. So 1/2, 1/4, 1/8, 1/16.... Sure, the shorter it gets, the antenna is less capable for the full wave. And also, it's ideal for other frequencies.

If one pics an antenna that is say, 1/6 of a full wave, it's going to be pretty useless. It's for a whole other freq. range.

Now, if I don't remember wrong, FM and dab are compatible for the antenna. DAB is 1/2 of FM. So it's a good example of one rod working on two systems.

GeorgeC wrote: I must apologise to TatterTot for fobbing him off with my last reply. It was not meant to be personal.

I needed to stay focused on the primary task, finding a solution. Sad to say, still no outcome to bring to the forum.

DAB Radio, particularly mobile, just does not rate any investment (it's not $exy) from the major communications companies.

Like the Insurance Topic, I will keep at it and report back.

No worries, all good

If we don't find a solution to this, well I guess I just have to build one. At least to get it tested. Or get an original antenna, and chop it. It's a simple thing.

OK, it's been a while since I started this topic, but now for me I have got the final solution.

Now the std aerial being GPS/DAB & FM an alternative swivel base was impossible to find so......

1st job was to find a good GPS antenna. I got a magnetic one and have stuck it to the inside of the roof behind the interior light. This is showing the same number of satellite fixes as the original did.



Wire fed down the A-post.



2nd job was to find DAB antenna the worked as good as or better than the original. I tried a 'Puck' type that didn't work too well, so went for the Glass type.



Last job was to fit a CB aerial and put a connector on it so it would plug into the existing aerial connector in the roof. The CB aerial came with too thick a coax.



So an adaptor was was purchased with an SMA connector that I cut off.



Because I wanted to use the existing connector in the roof I managed to get the proper connector housing and the crimp terminals to use.





I didn't expect to find an odd shaped hole in the roof.



Pleased to say all 3 work and I'm quite pleased with how it looks.

Awesome. Good work done there