Kaymar HF mount on 100 LC
Submitted: Friday, May 27, 2005 at 10:17
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JohnN
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
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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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.
AnswerID:
113254
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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