[Antennas] gain and directivity

[Ed]

OK, let's get another thread started. I recently got into a discussion =
over the local 2 meter repeater. Some older hams and some brand new ones =
were talking about j-poles and gain and directivity as well as =
directivity in vertical base station antennas. The nearest I can figure =
is that no one agrees. My take was that the j-pole supposedly exhibits =
about 2.5 to 3.0 gain and may be somewhat directional. I have personally =
experienced quite a bit of directivity in my vertical antennas at home. =
They are , of course , advertised as being omni directional. Apparently =
a lot of factors such as nearby objects and grounding affect this. I =
know a lot of this stuff is based on theoretical antennas in free space =
but it sure makes for good repeater fodder to listen to. What's your =
all's take and opinions. Please keep the flame throwers holstered as I =
just would like to hear the experts comments.=20
ED YEARY W4TEY
325 CUMBERLAND DRIVE=20
HARROGATE, TN. 37752-6942




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