2 antenna mobile

[bighammer]

which set up do you prefer. 1 hot 1 ground or 2 hots?

 

[C W Morse]

One antenna! Unless you are in a big semi, you are wasting your money! The antennas cannot "be in phase" unless they are at least NINE feet apart! A small car or pickup truck will receive no benefit to two antennas! What it does is make money for the vendor because it doubles the numbers of antennas he can sell! You would be better off with ONE highly efficient antenna in the center of the roof of the vehicle.


73

CWM

 

[bighammer]

well i do have the roofline to space them at more then 9 ft. im more concerned of the two different 2 antenna set up comparison.

 

[KingCobra_CDX882]

iwill go a step further
2 antennas too close to each other can hinder transmit

 

[bighammer]

i know how to set them up correctly to be of use. i understand one of you prefer one antenna. thats cool, how about the people who have used either

 

[Hamin' X]

Hygain used to make a mobile co-phaser box that you could use to phase two antennae. by switching the control, you could change the directivity of your signal. Anyone remember these, or am I dating myself.

Rich

 

[KingCobra_CDX882]

if you have the room...then ofcourse dual is better

 

[Master Chief]

I believe the original poster is talking about a competition set up and not a set of antennas for a semi.

 

[KingCobra_CDX882]

i never did compition from car or truck
still i know those serious about winning
use multi......usally not single

i was never into key downs
perfer DX and therefore also perfer non directional when was in car or truck going from one mountian top to another mountian top hiding place (used to sneak under some very remote mountian top cell towers......lol

 

[321 watergate city]

One antenna! Unless you are in a big semi, you are wasting your money! The antennas cannot "be in phase" unless they are at least NINE feet apart! A small car or pickup truck will receive no benefit to two antennas! What it does is make money for the vendor because it doubles the numbers of antennas he can sell! You would be better off with ONE highly efficient antenna in the center of the roof of the vehicle.


73

CWM

I have to disagree two antennas on a mobile applaction work well at 6 foot or further.. I have ran a 6 foot sapcing on a mobile for years and one hot and one grounded antenna will concenrtrate much of your signal forward if the anteannas are tuned correctly..

 

[995]

321, he is talking about cophased antennas. One hot and a reflector is not cophased. I have ran a setup like you mentioned and I agree it worked great for me with a reflector at 6 feet aswell!

I've really been wanting to try the out of phase antennas again. Last time I tried it I used some BS CB'er gospel and it didn't work. If anyone wants to do try it.....bust out the calculator!!!

Toll_Free and myself have discussed this previously in a thread titled "Mobile antennas in phase quadrature". It's a few down this page if anyone cares...

 

[995]

1 hot one not can't do this:

 

[bighammer]

can we see a pic of 2 hots? and what would 1 hot and not be like.

 

[995]

The above picture is two hots fed 90 out of phase.

It's hijacked from here....
http://www.bellscb.com/cb_radio_hobby/antennas/antarray.html

They don't have anything for one hot one not though....in a perfect world I suppose it would look like a yagi pattern....more elongated (more gain out the front) with some lobes here and there....

 

[995]

HUH? Why couldn't you drive around with it! The antennas are on the "X" axis.

It would look no different than 1 hot 1 not!