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Re: Ao40 , negative 13cm RX attempt.



Good Morning to the Group,

To emphasize the point, Jean-Louis and I had a very good QSO (not just a
signal report exchange) a couple of months back while I was also using a
single helix.  As Jean-Louis states, a dish is certainly an advantage but
it is not essential.

73's de Jess - W4MVB

On Mon, 19 Nov 2001 13:05:27 +0100 Jean-Louis.RAULT@fr.thalesgroup.com
writes:
>> -----Message d'origine-----
>> De: Edward R. Cole [mailto:al7eb@ptialaska.net]
>
>(...)
>>   Some have heard the beacon
>> using just a large helix (23-35 turns), but for adequate 
>> performance to
>> work stations which are to stay 10 dB weaker than the beacon, 
>> you need a dish.
>
>Yesterday evening, I contacted one VE6, two W and three F stations in 
>a 30
>minutes time slot with my 21 turns helix and a 36 dB gain / 0.9 dB NF
>converter (measured values).
>With such a reception chain, using WPSKDEC decoding software gave me 
>80% of
>correct TLM CRCs when the sat was at its apogee.
>So, IMHO, a dish is useful but not mandatory :o)
>
>Cheers
>
>Jean-Louis F6AGR
>
>
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