BOBRR
Member
Hello,
Have a GRE 500.
Tried listening to an airport Control Tower (118.5 MHz AM), about 5 miles
from the house, with a rubber duckie for the antenna.
Here's what I found playing around.
When the scanner is held normally, that is with the antenna vertical, the
airport comms from the Control Tower were really poor.
Lots of static and noise.
But, much better when held horizontally.
a. Any idea why ?
I would have thought that their antennas would be polarized vertically
to communicate with planes, but not sure.
b. any idea how their Tower antennas are likely polarized (if at all) ?
c. and this one really confuses me.
The best reception, by far, is if I point the antenna vertically, but
DOWNWARD ! Big difference from vertically up.
Wouldn't vertically up, and vertically down be identical and symmetrically
the same re polarization, reception, etc. ?
Thanks,
Bob
Have a GRE 500.
Tried listening to an airport Control Tower (118.5 MHz AM), about 5 miles
from the house, with a rubber duckie for the antenna.
Here's what I found playing around.
When the scanner is held normally, that is with the antenna vertical, the
airport comms from the Control Tower were really poor.
Lots of static and noise.
But, much better when held horizontally.
a. Any idea why ?
I would have thought that their antennas would be polarized vertically
to communicate with planes, but not sure.
b. any idea how their Tower antennas are likely polarized (if at all) ?
c. and this one really confuses me.
The best reception, by far, is if I point the antenna vertically, but
DOWNWARD ! Big difference from vertically up.
Wouldn't vertically up, and vertically down be identical and symmetrically
the same re polarization, reception, etc. ?
Thanks,
Bob
