[Lowfer] A little lower than lowfer...

Sat, 18 Oct 2003 16:59:57 -0600 (MDT)

Hi Kurt,
  That would be a great dish for 18 GHz!  I use a 2' dish for 10 GHz. I
don't think it would work on 18 KHz, but I know some of my fellow birders
use similar size dishes for listening to bird songs at a distance so
maybe?  Can anyone explain why a 2' dish will not even work well at 50
Mhz, but does provide gain at the audio frequencies?
Doug W0AH

> Maybe someone can advise...
>
> I have a 14 channel ultrsonic transmitter I hve been playing with.  It
> is fairly low power, at least to me, my wife smacked me when I turned
> it on in the house, and broadbeamed.  I haven't measured the
> frequencies yet, but I would guess the highest is around 18 KHz.  I am
> in need of projecting this acoustic wave about 700' at about 100' max
> divergence.  I have a 2' aluminum parabola, would this work for this
> purpose?
>
> Is there a list around that deals with this sort of experimentation?
>
> Kurt
>
> ---
> Ross Technologies Signals Intelligence Division
> Rosetta Proving Ground
>
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