[Moon-net] 10GHz moon noise

Paul Chominski pchomins at san.rr.com
Tue Feb 6 20:54:09 CST 2007


I am getting 1.6 to 1.7 dB Moon Noise over the last two years. My setup is 
3m dish f/D=0.29 illuminated with Chaparral feed. Edge illumination is 
about -13.5 dB. Cascaded RX NF in front of the feed is about 1.2 dB.
VY 73 Paul WA6PY
----- Original Message ----- 
From: "Charlie Kahwagi" <ibnkarim at bigpond.net.au>
To: "MOON_NET" <moon-net at list-serv.davidv.net>
Sent: Tuesday, February 06, 2007 5:30 PM
Subject: [Moon-net] 10GHz moon noise


> Hello everyone.
>                        I am slowly getting 10 GHz setup, but I am so far 
> getting less than ideal results.
> At best so far,  I have 0.95dB moon noise  and  11 dB sun noise (SFU=81 @ 
> 10.7cm)....for a 3.7M dish I think I have a lot of improvement to make.
>
> I have reverted to a linear feed to help with optimisation.  My initial TX 
> testing proved disappointing as I had 25 W at the feed but was unable to 
> detect/ hear any echoes  with moon at Apogee and 0.8dB moon noise.
>
> I have a question:
>
> I have read that the amount of moon noise changes with the "phase of the 
> moon"..........Is this correct?..........If  so what levels of variation 
> exist?
>
> Many Tnx
> Charlie
> VK3NX
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