Pete;
Good post... .
What you are referring to is the vertical radiation angle of the antenna, and you are correct to assume that lowering the radiation angle will improve mobile to mobile operating distances, however, a coiled antenna does NOT mean that it will have a lower radiation angle. This only means that it is a coiled antenna. Radiation angle is a function of the operating wavelength and a few other details. It is very evident that many antennas of similar physical design can have radically different radiation patters - so buyer beware. Remember than antennas that have a low radiation angle, will typically (typically that is, although NOT the rule) have a gain associated with it - since the main spherical lobe has been "compressed" into a low angle lobe, all of the energy that was in the higher radiation angles is now focused into a lower angle, giving you gain. . . . that is provided your matching losses are not high
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Antenna manufacturers that provide a vertical radiation plot are the ones that you can trust will live up to their promises, as you can visibly *see* where your precious power is going
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And yes, Pete, you are indeed correct that you CAN have ranges mobile to mobile even farther than 12 miles... . in some cases 25 miles if the terrain is right-
I should have made a note that the distances I was referring to (7 or 8 miles) were in consideration of the "typical-poor"
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mounting system (mirror mount) and short vertical radiators with lossy loading coils. When operating under antenna systems like you are using (which are long, and not lossy) - with a good ground plane system - you will indeed reach the distances you have reached---- It's good to hear that folks out there are putting their money into the antennas rather than linear amplifiers !!! LOL
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With so many folks into this thread, you'd think we'd have more hams
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... ...
Keep a Hammin' and a Rammin' guys!!!!
Shawn
VE6PV
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'99 2500 ISB QC 4x4 5spd SB, Camper Special, Tow package, Intense Blue, Armourthane color matched box liner. AND I LOVE THIS TRUCK!!!