On May 1, 7:35*pm, JIMMIE wrote:
On May 1, 7:37*pm, "Dave" wrote:

"Art Unwin" wrote in message

....

David, the antenna covers the distance covered by a mfj 259 b which is
1.7 to around
175 mega hz. Obviously it therefore has no limits above .Below I
cannot measure unless I modify my radio outside the amateur bands, ie
reflect swr outside the ham *bands. Beam widths I can't determine as I
do not have enough segments available on my optimizer program . But I
believe that can be accomplished.

but wait... you have built it.. you can measure the swr, so why can't you
measure the beamwidth? *pick an AM broadcast station and turn it and see how
wide the pattern is.

I dont know if Dave built it or not but I did and tested the beamwidth
just as you said and got 360 degrees. Rotating it had no effect at all
on signal strength. I tried it on 2M and couldnt hit the local
repeater with 1 watt normally I can reach it with 100mW. I would say
this classifies the antenna as a dummy load.

Jimmie

But Jimmie I have not divulged the full story. It is up to you to
determine the merits of antennas that you make without posessing the
full instructions. I was intent on sharing all with my fellow hams but
after the pilloring of the Dr who came on board so that he could help
with the problems that the group were having with mathematics and
Maxwell it appeared to me that most thought all was known about
antennas thus all is known about mine. I don't mind if you think it is
a dummy load since I do not know the merits of your education. You may
well be the same person who was argueing at the same time who admitted
to never graduating from high school.
David
I have ordered some remote relays so that I can operate the camera
scan and rotate
mechanism that I use to carry the antenna and every thing takes time.
I would also remind you that beam width can only be determined in
terms of point to point transmissions and grazing angles on ground
level antennas can create havoc.
Either way, you never did concur with the mathematics presented on
this antenna so
I thought you should drop the subject all together since you seem to
be my superior in these matters and feel you have proved my
mathematics in error. Suffice to say I have described the abilities of
my antenna and care not whether you can believe it or not until you
delve more into Maxwell's laws in light of what I have stated. Rest
assured that Richard still agrees with your assesment a judgement you
should feel confident about. Grin
Let us move on and let somebody else take over this thread for their
own use which is now coming to be the norm.
Art