[amsat-bb] Arrow Antennas 437 X 14 Antenna

[Hasan al-Basri]

Les,

Advantage:
Lower transmit power (because it has more gain), but the birds require such
low power as it is with a yagi, that it is not important in the lower USA

Disadvantage:
Harder to stay on bird (tracking), because its pattern is narrower (that's
where the gain comes from)

If you have a clear view of the sky and no obstructions:

I'd stay with the standard size if you have 2.5 or 5 w output from your
radio.

If you have obstructions, then more gain might help on rx, and certainly
will help "some" on tx, but once you hit foliage or the house...your 70cm
uplink signal will be greatly attenuated and there is little you can do
about it.

I run eggbeaters (omni antenna with very little gain) and am being heard
quite easily when the house doesn't get in the way, or there isn't thick
foliage .

All these comments are predicated on 70 cm uplink and 2m downlink. The
obstruction losses are MUCH less on the 2m downlink than on the 70 cm
uplink.

73, N0AN
Hasan


On Wed, Nov 14, 2018 at 9:56 PM Les Rayburn <les at highnoonfilm.com> wrote:

> Not that experienced with satellite operation, so I’m hoping someone can
> fill me in. What would be the advantage of the Arrow 437 X 14 antenna be
> over their standard antenna with 7 elements on 437?
>
> I’m considering it for fixed station use—not portable.
>
>
> 73,
>
> Les Rayburn, N1LF
> 121 Mayfair Park
> Maylene, AL 35114
> EM63nf
>
> Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA.
>
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