[amsat-bb] Arrow modification

[David Swanson]

Forgot to add - I've also built several 'sleeve driven' designs in my early
days, and they only performed at a fraction as well as a proper driven for
each band. If you're more interested in just straight up ease of
construction without requiring a duplexer or 2 rigs, then it's certainly an
option. But if you care about hearing the bird < 15° then you'll get
superior performance using a individual band driven design.

-Dave, KG5CCI

On Wed, Jan 2, 2019 at 9:57 AM David Swanson <dave at druidnetworks.com> wrote:

> I've built cheap yagi's with the 2m/70cm elements on the same plane (
> http://www.druidnetworks.com/same-plane-cheap-yagi.jpg) and used them to
> work down to the horizon on all the FM birds - from a clear location of
> course. Check out the AMSAT facebook page from about a year ago, and my
> youtube channel for the videos if you're super interested.
>
> According to WA5VJB's ubiquitous document (
> http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf) the plane
> alignment shouldn't matter so long as the elements aren't interacting with
> each other. He's a much smarter cat than me, and after building such gizmos
> based on his design, I have no reason to believe an arrow built in the same
> fashion wouldn't also do the trick.
>
> -Dave, KG5CCI
>
> On Wed, Jan 2, 2019 at 9:37 AM Bill Acito <w1pa at hotmail.com> wrote:
>
>> Doug,
>>
>> I been thinking about this as well.  One antenna (arrow) for those birds
>> with antennas at 90 (SO-50), and
>> another for those birds with them in line. I've been looking at parallel
>> designs(think "trident") e.g. take my elk, use that for 2m, and have a
>> clip-on parallel spot for a 432 or 1.2G beam.
>>
>> Tired of doing the TX-90-degree-twist.
>>
>> Bill W1PA
>>
>>
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>