Thread: UHF Antenna location

Originally Posted by buddha D2

I had my UHF and broomstick phone antennas mounted on rear wheel carrier of D2 until I recently installed my ARB bar, which is here the antennas now reside. I would say I am now getting far superior reception than the rear mounted position. RFI hi-gain type UHF antenna.

Gags

How high was the antenna base mounted on your wheel carrier ?

My 94 LSE came with a glass mount front windscreen analogue mobile phone 800Mhz aerial and cabling so I simply had it retuned to 477Mhz. It works fine for UHF CB. A unity gain whip for UHF CB is tiny. Gutter mount is best if you're unwilling to drill the roof. No chance of scraping the car park fluros. Massive bar mounted UHF CB high gain whips are more for plumage than practical purposes. Granted, they will certainly get you respect at the Deni ute muster... especially the good old twin trucker style...Any decent track will shake them to bits. That's if the trees don't trim 'em first...

When I got my UHF I ordered a bracket from this bloke in Mittagong NSW. It arrived 2 days later and works perfectly for me, predominantly highway and beach work but some bush bashing stuff in western and central Qld also.

Cheers

Dom

Originally Posted by rusty05

x3

And a high gain antenna is best out in the open areas as it propagates the signal out horizontal more than up.
So high gain like 12db is good for open area etc, but not so great in hilly areas. a smaller gain antenna of <6 db is better suited to hilly terrain. So if u have spare $$, and spend time in each terrain, u would benefit from swapping them around.
(If u could be bothered)

This is probably a dumb question...but...

Could you install both a 12db & a <6db via a three way splitter off the coax, or does this sap the transmit 'power'?

Originally Posted by Duck's Guts

This is probably a dumb question...but...

Could you install both a 12db & a <6db via a three way splitter off the coax, or does this sap the transmit 'power'?

You could, but dont.
theory is 3db loss every time u split (which is half ), in reality it is a bit more around 3.5 db loss
Once u start to use 2, u then need to consider the distance between them( in multiples of 1/4 wavelengths), they also then change their pattern. It gets complicated and is best left for base stations which need signal to go in the same direction every time all the time, unlike a car.