--- In [email protected], "Jim Cicirello" <[EMAIL PROTECTED]>
wrote:
>
> Is there a recommended distance from the leg of the tower that a
> 2-meter or 440 MHz Antenna should be mounted? I am going to have a
> couple of Antenna Mounts welded up and I wondering if they should be a
> 1/4 or 1/2 wave from the tower leg or possibly an odd multiple? TIA
>
> 73 JIM KA2AJH
I used to have a copy of that program, but it is on the drive of my
dead laptop. But the general, short answer is that at 1/4 wave
spacing you get more signal directly out from the tower-in line with
the tower and antenna. At 1/2 wave spacing, the signal is squashed
out at 90 degrees to the line between the tower and antenna, and
decreased straight out from the tower. I have confirmed this in
actual measurements, while remotely switching between a top mounted
omni and a 1/2 wave spaced antenna. Numerous measurements were made
in the field with an in-line attenuator feeding the receiver.
Hmmm... have to get that DB program from somewhere again. Jeff?
Laryn K8TVZ
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