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I am learning alot, ya I guess truckers use dual antennas to go around the trailer but acording to the firestick website it also helps project the signal to the front and back of the truck, but does it hurt side performance this is unclear. Firestick also seems to think that the 9 foot distance between dual antennas is in reallity a myth and are happy to see there antennas as close as 5 feet.
I can do 5 feet apart the truck is wide enough for that, I want duals cause well I want my truck to be symetrical and don't want it in the middle, If it also works better all the better. The question is, is it better to have them higher or further apart, If I put them on the roof there higher but closer together or on the mirrors there further apart but lower.
I guess if it works better I could put up to an 8 foot in the center of the cab roof either on the front or rear corner, that would look ok.
Opossum, if you want duals, a set of high quality mirror mount antennas will work great and last a long time. Yes they will push signal front and back because that's what they're designed to do, but your side to side will be fine, only front to back better. Another plus is most of the dual sets don't need to be tuned, just install correctly and you're set to go. Just always read up and know what you're buying and follow all the manufacturer directions exactly.
Just looked at the Wilson site, thanks John great stuff, excellent mounts and stuff. I do find it interesting that they don't recommend their duals for a pickup. From the spacing requirements it looks like the Wilson's are aimed at 18 wheelers only. Antenna Specialists used to make a great pair for vans and pickups that were almost indestructable. I had a pair I put on my 1980 dodge van the week I bought it and in 1986 when I sold the van I gave the antennas to a friend and he had them for at least 5 more years.
I guess there are top and bottom loaded antenas, if I were to place a pair 5 1/2 feet apart but use one top loaded and one bottom would this effectivly place the most funtional parts of the antennas further apart, and thus acheive the magic 9 foot mark.
Usually those antennas are made as matched sets and have to be used as such. That being said, you could always check with Wilson and see what they say. Good Luck with your rig.
Like I said you DON'T NEED DUALS on a pickup. If you want it symetrical, put a dummy antenna on the other side. Plus you'll get better output by not having to split your power out 2 cables.
Take a quick trip down to Jubitz Truckstop in N. Portland, OR.
Dirs... From I-5 North:Take exit 307 then veer right towards Marine Drive East. Turn left at the first stop sign onto Marine Drive East. At the next stop sign, turn right onto N. Vancouver Way and continue for about 3/4 of a mile. Jubitz will be on your left.
you dont say what model, but the 25 or higher (or the uniden PC series - identical) can be destroyed by too much SWR - Id have any antenna installed with an SWR meter (which IIRC the 29/76) models have built in.
You can damage the finals inside any cb no matter what model # it is.
The cobra 25 also has a SWR meter.
Simple, just go to RadioShack. They have either magnet mount that cab used on rooftop or any flat surface, or get whip type antenna and body or mirror mount. The best antenna is the body mount, steel spring and 102" whip mounted to side of truck bed or rear step bumper.
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