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Re: L-band uplink



Assume 10 watts output for the Mitubishi brick on SSB. The data sheet
clearly states 10 watts output and a test of my amplifier showed lots of IMD
above 10 watts.

73,

John
KD6OZH

----- Original Message -----
From: "Jim Sanford" <wb4gcs@AMSAT.Org>
To: <amsat-bb@AMSAT.Org>
Sent: Wednesday, 29 August 2001 02:10 UTC
Subject: [amsat-bb] L-band uplink


> Ladies and Gents:
> Have been experimenting with the various spreadsheets for construction
> of the L-band uplink station.
>
> Assumption:  single Mitsubishi brick, allegedly capable of 18 watts
> output on SSB; more like 10 to 15.
>
> Considered a single helix at 16db max gain (based on the NRAO graphs).
> This works, but leaves no margin.
>
> Considered a pair of 16db helices, 19db -- 11 to 18watts would activate
> LEILA.
>
> Also considered a pair of 18db yagis, for 18dbc.  15  to 18 watts
> activates LEILA.
>
> Does this analysis concurr with those who are already on L-band uplink?
> Any other thoughts/comments??
>
> Thanks & 73,
> Jim
> wb4gcs@amsat.org
>
> ----
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