Kaymar HF mount on 100 LC

Submitted: Friday, May 27, 2005 at 10:17
ThreadID: 23351 Views:2067 Replies:5 FollowUps:4
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Gday All

I have just bought a Kaymar HF ant mount for my rear wheel carrier bar.
The Mount is 440mm and the Autotune ant 890mm which takes the combined
height way above the rear roof level.

Has anyone with this setup cut the kaymar mount shorter so that the ant
was just higher then the roof level?

Any issues/comments/advice? Any pics appreciated.

cheers
JohnN
04 100 TD
soon to be HF equipped
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Reply By: Member - Banjo (SA) - Friday, May 27, 2005 at 11:11

Friday, May 27, 2005 at 11:11
Welcome to the HF community John - what breed of hardware are you going to be using ? Re the mount - I bought one from 4WD systems in SA - height turned out ok as was. Don't know the Kaymar......
AnswerID: 113164

Follow Up By: JohnN - Friday, May 27, 2005 at 11:36

Friday, May 27, 2005 at 11:36
Gday Banjo
Bought a Codan 9323, joined vks737 and Radtel... looking forward to getting it all going.

cheers
John
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FollowupID: 369299

Follow Up By: Member - Banjo (SA) - Friday, May 27, 2005 at 13:30

Friday, May 27, 2005 at 13:30
Yep... the 9323 system is rated very highly among HF'ers .... the 'black post' is a bit high though, as you say. Whatever.......
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FollowupID: 369312

Reply By: Member - Paul P (Bris) - Friday, May 27, 2005 at 18:11

Friday, May 27, 2005 at 18:11
John

I have been through the same issue as you with the antenna mounting. Height is the issue. I tried to keep mine (Codan) at 2 metres or slightly less so I could go in to car parks etc. Failed dismally so far. My mount is from SA also (good quality well made) and I end up around 1.3metres (ground to top of auto tune without spring base).

I assume you Kaymar is just a pole mounted to the bar? If so what you are thinking of doing should be okay. Perhaps a phone call to Kaymar.

My research indicates that you should have the top of the auto tune slightly above roof line for best performance.

Regards

Paul
AnswerID: 113216

Follow Up By: Member - Paul P (Bris) - Friday, May 27, 2005 at 21:32

Friday, May 27, 2005 at 21:32
Wooops should be 2.3 metres
Paul
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FollowupID: 369414

Reply By: Peter 2 - Friday, May 27, 2005 at 21:00

Friday, May 27, 2005 at 21:00
The heeight of the Kaymar 'post' is the optimum height for the Codan antenna, ideally you need that height/distance from vehicle body to get it to work/tune correctly. You can mount it lower/closer but will result in degraded performance from the unit.
Barrett antennas are usually more tolerant and can be mounted lower.
The codan antenna should have the top 300mm above the body for optimum performance.
The coil of wire in the tyre (steel belts) will also affect antenna performance if mounted too close, nothing like a big steel coil that is electrically isolated from the vehicle beside the antenna to cause probs.
Having installed dozens of HF's in 4wd's I've struck a few problems over the years.
Peter
1996 Oka Motorhome

Member
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AnswerID: 113254

Reply By: robsil - Friday, May 27, 2005 at 22:35

Friday, May 27, 2005 at 22:35
i have mine mounted on the original highlift jack base plate ,silghtly modified, its on a gq patrol, has been around the country the last 8 years,last year the canning no problems.its the original gq kaymar bar.
AnswerID: 113274

Reply By: JohnN - Sunday, May 29, 2005 at 08:49

Sunday, May 29, 2005 at 08:49
Thanks Peter and Paul

I fitted it up yesterday and as suggested end up around the 300mm above the roof line. This is clearly too high for general 'round town' use.

I dont mind cutting the Kaymar down.... and I dont mind having the autotune off when I am round town if I leave the Kaymar alone.

Can I just clarify what you said Peter - that shortening the Kaymar post will degrade my reception and/or transmission?

Turned it on 1st time yesterday and listened to AFL footy on ABC Brisbane... felt like a kid with a new toy.

Cheers
JohnN
AnswerID: 113439

Follow Up By: Member - Paul P (Bris) - Tuesday, May 31, 2005 at 19:00

Tuesday, May 31, 2005 at 19:00
G'day

The height issue is a delima. My Patrol in standard form is 1.85metres high. I have a UHF CB antenna on the front bull bar which attains a 2 metre height.

I had a look at the Kaymar HF setup for the new GU IV model ( mine) rear replacement bar and noted that it would be possible to weld a second mount on the unit which would enable the round town installation, keeping max height to 2 metres or less.

Mine currently runs at about 2.3 metres with the autotune attached ( no antenna or spring base). This keeps me out of a car park we use monthly unless I remove the auto tune.

I will be giving serious consideration to the Kaymar or new ARB rear replacement bumper when I return from my holiday. I had a Kaymar rear bar on a 4 runner and found their product excellent.

Regards

Paul
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FollowupID: 369854

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