Hi Cecil, and thanks yet again! Comments below...
"Cecil Moore" wrote in message
...
Old Ed wrote:
1. At what elevation angle X does the monopole show the highest gain,
and what is that gain?
Already answered. If I remember right, it was 0 dBi at 26 degrees.
You quoted the 0 dBi at 26 degrees in an earlier post; but
you did not identify the 26 degrees as the highest-gain angle.
2. What is the "average" gain of the dipole, at elevation angle X,
taken over the full 360 degrees of azimuth, at one-degree
increments?
Please define "average" gain. The reason for using a higher gain antenna
is to increase the gain above an "average" monopole. How about if I just
post the radiation pattern on my web page?
I did provide my definition of average (azimuthal) gain with the question;
but you snipped it out. 8-( Not to worry, I can snip it right back in
again...
"2. What is the "average" gain of the dipole, at elevation angle X, taken
over the full 360 degrees of azimuth, at one-degree increments?
(Note: Gain data points expressed in dB should be converted to
linear powers, the linear powers averaged, and then the average
linear power converted back to dB, of course. To do otherwise
would improperly penalize a lobed pattern (the dipole) that might
have one or two minus infinity dB gain values.)"
I know where I want to QSO to so I turn my 130' dipole broadside to AZ.
3. If you're still on board with all this, it would also be interesting
to know what happens to the elevation angle and gain of the
monopole if the number of radials is kicked up to a large number,
like 64.
It no doubt, goes up. 8 is all I ever installed. Seems to me a waste of
effort to use 32 times the copper that it takes for a dipole and still
not have the gain of a dipole. Incidentally, my 20m-10m dipole is
rotatable.
Well, I wasn't suggesting that you put more real copper in the ground;
I was just hoping you might put some more virtual copper in the model,
to see what happens.
As to quantity of copper (real or virtual), some folks find that wire is
cheaper than tall support masts. Other folks, perhaps with tall trees,
would see different trade-offs.
It's good your 20m-10m dipole is rotatable. Mine isn't. 8-(
But we were discussing the 130 footer, used on 30m.
If you can rotate that one, I'm impressed.
73, Ed
--
73, Cecil http://www.qsl.net/w5dxp