Great idea. Do the exercise as well as you can multiple times, throw
out the outliers and average the rest.
Drones are changing the world. Bagpipe players take note.
73 - Mark N5OT
On 10/31/2020 12:17 AM, David Gilbert wrote:
I would think that testing antennas today should be easier than it was
when the K7LXC/N0AX report was done, and I don't see why an antenna
range is even needed anymore. A wideband noise source mounted on a
drone with an appropriately polarized short antenna could fly around
the antenna while a receiver on the ground connected to the antenna
took measurements. Drones are very stable these days even in stiff
winds, and while I don't think GPS positioning would necessarily be
accurate enough to define near field location, various ways of doing
so from the ground (optical triangulation, tethers, etc) should be
sufficient. Far field measurements out several wavelengths could most
likely just rely on the GPS coordinates.
All of that assumes reciprocity, of course, but even if that was in
question I'd bet that it would be relatively simple and inexpensive to
design/build a small receiver for the drone that forwarded signal
strength data to the ground via an RF or optical link.
One big advantage of using the drone, of course, would be that the
measurements could also be taken at the actual operating site, thereby
including the effects of nearby structures.
I haven't seen any reports of anyone doing this yet, but I assume that
people already have.
73,
Dave AB7E
On 10/30/2020 8:35 PM, chetmoore@cox.net wrote:
Not a FLAME. But You would likely benefit from reading the k7lxc
N0ax tribander report. After raeading it I ordered the C31XR.
Force 12 is no more but some of their antennas are mechanically
improved and sold by JK and there are A lot newer tribanders I would
like to see them test on their antenna range. Hint, tests of some
of the mosely and hy gain antennas did not fare all that well. I
had a TH6, a TH3 , TH7 and a classic ta33 all of which worked
Pretty well..........in their day. My th-3 is still a good FIELD
DAY antenna and great as a mult antenna to grab south American
mults so I don’t have to rotate the c31.
N4fx
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