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Re: Hearing AO-40 MB at 150 deg. squint?



No antenna has an infinite front-to-back or front-to-side ratio and the
helical antenna used on the S2 transmitter doesn't suppress sidelobes very
well at all. The S1 transmitter probably would be inaudible as the antenna
is more directional.

73,

John
KD6OZH

----- Original Message -----
From: "Steve Diggs" <w4epi@mediaone.net>
To: <amsat-bb@AMSAT.Org>
Sent: Friday, 15 June 2001 13:01 UTC
Subject: [amsat-bb] Hearing AO-40 MB at 150 deg. squint?


> OK, guys I have a question here:
>
> I am sitting here listening to a very weak AO-40 MB, with Nova indicating
> squint is over 150 degrees. Distance is 6,100 miles, and elevation is 33
> degrees.
>
> I can both pick the sound out by ear, and see the normal "comb" like
> appearance in my DSP waterfall display. (AO40RCV).
>
> How can this be? The antenna is pointed away from me, and I have a big
chunk
> of satellite between the antenna and me. Is the signal bouncing off
> something and then coming back to me? I don't understand how the signal is
> propagating in such a manner that I can hear it in this configuration.
>
> Thanks much,
> Steve Diggs, W4EPI
>
> ----
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----
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