Thread: differences in UHF antennas of same gain

have a look here

Mobile One UHF CB Antennas

Good info explains the different antennas

I like RF 470 ground plane independent antennas,
the disadvantage being that you cant easily remove it from the bulbar when not required, You can unscrew the whip but the Silver 1/4 wave tube stays.

I use a short whip on mine, good for a few K's which is all you need on the road, carry a longer whip for more range & a sat phone if it gets nasty.

If you like taking photos out the window the black antennas seem less intrusive to me.

Anybody know what the really long, wire thin whips the cop cars have are used for?
Obviously they have the longish fibreglass one on the back which i'd assume would be for the computer, so im guessing the long thin ones are CB.
Anyone know the brand of them?
Cheers
Muppet

Muppet in your area the long thin ones are most likey hf the only ones that may have a cb are hwy patrol

Just went through two days of trauma researching antennas.

Pay attention to how the gain is listed. They use two different types, dbi & dbd.
dbi = dbd + 2.15
dbd = dbi - 2.15

I got a GME TX3520 remote face unit with a AE4705 antenna, 6dbi/4.5dbd so good middle of the road.. HD spring base, fibreglass antenna 1200mm long + another 100 or so for spring. Interchangeable with any other 4700 series antenna plus 4401, 409L & 4013. So you can range from 2.1 dbi to 8.1 plus there's a 9 available as well. Simple screw on and grub screw retainer.

Was $199 for whip, lead and spring, additional whip (say 9dbi for outback) about $130-.

thanks Club, but *why* did you choose fibreglass over the whip?

Originally Posted by goingbush

I like RF 470 ground plane independent antennas,
the disadvantage being that you cant easily remove it from the bulbar when not required, You can unscrew the whip but the Silver 1/4 wave tube stays.

I have an RFI CD900 series which looks to be equivalent to the RF470 series. I had always thought the riser was just that, but like the RF470, the riser provides the ground independence. I have a 5/16" mount on the roof of my D4 for just the whip (when required) to avoid the extra height so perhaps I'm loosing performance although I suspect the roof would be providing a reasonable ground.