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Re: Uplink power on L-Band



Jon
I also strongly disagree with your comments.
It's very simple for W0LMD to reduce his power, and he should,
and he's been told about that before.
Also, from different calculations, and from actual L-band experience,
I find that 1/4 watt into a 14' dish can produce a signal
that strong questionable ???????
Rick

----- Original Message ----- 
From: "Charles Suckling" <charles.suckling@ntlworld.com>
To: "Jon Ogden" <na9d-2@speakeasy.net>; "Amsat BB" <amsat-bb@AMSAT.Org>
Sent: Tuesday, February 04, 2003 1:52 AM
Subject: [amsat-bb] Uplink power on L-Band


At 23:41 03/02/03 -0600, Jon Ogden wrote:


>I worked W0LMD a few nights ago.  He has a 14 foot dish he uses on the
>uplink.  He was as loud as the beacon.  He was only using about a quarter
>watt.  If one has a good uplink antenna and is running the minimum power
>they can, they should not be called "guilty."
>
>
>73,
>
>Jon
>NA9D

Jon

I strongly disagree.  What causes an excessively strong downlink signal is 
too much ERP (dish gain x tx power reaching the antenna)!  If you have a 
big dish you must reduce uplink power until you bring the ERP to an 
acceptable level.

  If you can't reduce it on the rig, don't operate until you have added an 
attenuator somewhere in the system.

Charlie G3WDG



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