HF antenna mounting considerations...
Submitted: Friday, Mar 04, 2005 at 14:23
ThreadID:
20960
Views:
6376
Replies:
8
FollowUps:
7
This Thread has been Archived
Michael Carey
Hi Everybody,
I'm wondering what options there are for mounting a Codan 9350 antenna on a 2004 Prado. I have been asked by a friend for some help in the matter.
I seem to recall that having them on the bullbar is a no-no these days. Can someone point me to the legislation that refers to obstructions to the drivers vision such as HF antennas?
The other option I have is to mount it on the back door with some sort of bracket that shares the spare tyre mounting point. Is there an off-the-shelf antenna mounting bracket that is ready to bolt on??
Does mounting an antenna on the back increase the stresses on the door too much?
Please help....
Regards,
Michael.
Reply By: Member - Banjo (SA) - Friday, Mar 04, 2005 at 14:29
Friday, Mar 04, 2005 at 14:29
Mob in northern suburbs of
Adelaide make such custom brackets - Aust 4WD systems - link on the "links" page at vks7737.on.net (Offraod Equipkent section).
They may be doing one for te Prado.
Mine for the Jack is at the rear in behind the spare - seems quite sturdy - has served me
well. Note that if its on the front, it can be hit by "things" and the autotunes are costly !
AnswerID:
101117
Follow Up By: Member - Banjo (SA) - Friday, Mar 04, 2005 at 15:20
Friday, Mar 04, 2005 at 15:20
er....re my above post ...I should
check my cyber scribble - that line should read ... vks737.on.net (Offroad Equipment section)....
FollowupID:
359127
Reply By: Member - Landie - Friday, Mar 04, 2005 at 14:34
Friday, Mar 04, 2005 at 14:34
Good question. I am NSW based and have tried to glean the same information.
I have a HF Self-tune antenna mounted on the front bull-bar, however the mounting complies with the RTA guidelines. An inspection station has approved it on this basis.
It has been suggested that it might be viewed as an obstruction, however there appears little guidance on this point.
Consequently I have written to my State MP and asked them to seek clarification from both the Police and Transport Ministers, this is currently underway.
My suspiciion is that there are no firm guidelines on this point (vision obstruction)and at the end of the day, one should assume it is a State issue (RTA in NSW) as it is a vehicle modification and they are covered under State laws. Going back to the RTA guidance on bullbars, mounting HF antennas on the bullbar does not appear to be excluded, providing it complies with the directive they have issued.
I'll post the responses I receive in due course.
Landie
AnswerID:
101120
Reply By: BenSpoon - Friday, Mar 04, 2005 at 17:57
Friday, Mar 04, 2005 at 17:57
It seems that autotunes mounted up front are generally acceptable, it is more the position on the roobar that can cause dramas. Having them protruding beyond the front face of the roobar is a danger, and can be picked up on- this was mentioned in a recent post.
I have not heard of people coming to strife with the law over a front-mounted aerialwith the impaired vision matter, but as mentioned before due to the nature of our kangaroo magnet cars, rear mounting is certainly prefferable and would get you around this.would this do? (centre wheel mount)
AnswerID:
101145
Reply By: Smudger - Friday, Mar 04, 2005 at 20:00
Friday, Mar 04, 2005 at 20:00
Just recently fitted a UH to my Disco. After looking around I decided to use a gutter mounted antena, chrome mounting bracket cost about $20. Does the job real
well and when we get back from the bush it can be removed in about 2 minutes. I don't leave the radio in the truck full time, been broken into a couple of times and don't want to lose it. Same with antena, they are prime targets. And if they're too high you can't get into shopping centre car parks. Besides, mostly you only get rubbish on UH in town.
Catch you on the air one day.
AnswerID:
101161
Follow Up By: Member - Roachie (SA) - Sunday, Mar 06, 2005 at 22:00
Sunday, Mar 06, 2005 at 22:00
G'day Smudger,
I think you might have misread the question. asking about "HF" antenna, whereas you mention "UH" which I assume you mean "UHF" (based on your statement that you mount your antenna on the gutter of your vehicle).
HF Antenna's (the auto-tune variety anyway) are the quite large units you'll often see........about 3 foot high and about 30mm or more in diamter. They then have a whip type antenna on top of that, making them anything up to 8 feet tall.
Cheers,
Roachie
FollowupID:
359329
Reply By: lindsay - Sunday, Mar 06, 2005 at 10:08
Sunday, Mar 06, 2005 at 10:08
Micheal. I have my HF auto tune on the Bull Bar and it has 2 mounting points, one is that it sits down on the bumper bar section at the side when we are not in the bush. When we go bush I move it to the top of the Bull Bar to the centre of the vehicle. I have found that with two identical radios and the auto tune on
mine in the lower position and another in a position on top of the Bar my radio did not recieve or transmit as good as the one on topof the bar. You will find that the part of the base will need to be clear of obstructions to operate adequately, it will operate but when you need it in bad conditions it will make a difference. The other aspect is that if the antena is in front you will be able to observe it in areas where there are overhanging branches ect. In Victoria on www.vicroads.vic.gov.au there is a vehicle standards information section look at No 29, it deals with the field of vision and is quite explanitory. I run my self tune to comply that document at
home and if I ever get pulled up I will relate to that. In the bush I am quite happy to take the risk knowing that I can always just remove the antena to the lower position.
AnswerID:
101296