FLARM antenna question (hindrance from metal)

bumper,

I'm talking about the main bipole antenna (I have a core unit, not a portable).

Is that coaxial cable so poorly shielded that I have to create a special routing for it away from the radials? What kind of performance degradation are we talking about if the coax is, say, 1cm from the radial (and no metal is involved for the mounting)?

In PF's "Good Examples" section of their web page, the first example shows the coax lead running close to the lower radial. It also looks like a metal bracket, but I could be wrong about that.

2NO

That was he http://powerflarm.us/powerflarm-installation-notes/

On Friday, March 15, 2013 9:36:32 AM UTC-4, 2NO wrote:
I'm talking about the main bipole antenna (I have a core
unit, not a portable).

DIPOLE !

Is that coaxial cable so poorly shielded that I have
to create a special routing for it away from the radials?

No, the outside of the coax is a ground, which needs to be
away from the radiating portions of the dipole.
Mount it on wood, plastic, or glass, AWAY from other
antennas and metal. PLEASE read and follow the FLARM
recommendations from PowerFLARM.us and ignore uninformed
speculation on RAS !

Hope that helps,
Best Regards, Dave

On Friday, March 15, 2013 6:55:47 AM UTC-7, Dave Nadler wrote:


No, the outside of the coax is a ground, which needs to be

away from the radiating portions of the dipole.

Mount it on wood, plastic, or glass, AWAY from other

antennas and metal. PLEASE read and follow the FLARM

recommendations from PowerFLARM.us and ignore uninformed

speculation on RAS !



Hope that helps,

Best Regards, Dave

Dave,

Just to be clear, my reply to 2NO wasn't uninformed RAS speculation. I simply did not go into detail as to the reasons why, when I wrote, "Also, be sure to keep the coaxial cable running straight away from the antenna for a few inches - - don't run it alongside the radial.".

bumper

On Friday, March 15, 2013 11:28:44 AM UTC-4, bumper wrote:
Dave,
Just to be clear, my reply to 2NO wasn't uninformed RAS speculation.
I simply did not go into detail as to the reasons why, when I wrote,
"Also, be sure to keep the coaxial cable running straight away from
the antenna for a few inches - - don't run it alongside the radial.".

bumper

No worries bumper, no one is going to accuse you of being uninformed !
See ya, Dave "YO electric"