Germans actually. See http://www.eham.net/forums/Satellites/2020 for
some details. The receive preamp was not mentioned in this article but
was a low noise design by Sam Jewell, G4DDK.
On Thu, Mar 11, 2010 at 1:33 PM, Don Latham wrote:
I think the Dutch have done EVE; seems something passed by on Moon-Net
in
the past year...
Don
Dave Baxter
Sorry, it's already been done I believe.
http://freenet-homepage.de/dl4yhf/speclab/earth_venus_earth.htm
Some years ago, like nearly 20, I helped some friends and built a 224
element broadside colinear aray for EME. It (eventualy) worked realy
well. Echoes could be heard under good conditions with 5W I seem to
recall (and no computer driven DSP tools then.)
We also did so far (as we know) the only mobile EME contact, between
G8MBI/m and W5UN. As a result, I think my Land Rover holds the
world
2m mobile DX record (regardless how you calculate it.) Also the
World
EME land speed record (45MPH).
http://www.rfham.com/g8mbi/mbi.htm and scroll down about 3/4 down
the
page.
73. Dave G0WBX.
Not sure about being a fully qualified "Time Nut", but a Nut none the
less! The sticker on the back door of the Landie these days also
confims it. "This vehicle may contain nuts"
-----Original Message-----
Date: Wed, 10 Mar 2010 14:32:33 -0700
From: David Forbes Subject: Re: [time-nuts] nubie querie
To: Discussion of precise time and frequency measurement
Message-ID: Content-Type: text/plain; charset=ISO-8859-1;
format=flowed
Hal Murray wrote:
This, and similar impressive accomplishments, has prompted some
lunchtime discussion at work (JPL).. One of us (N5BF) has been
contemplating what it would take to do an amateur EarthVenusEarth
(after some of his experiments doing EME with 5 watts)..
Perhaps a better question is: What is the bandwidth?
What sort of signal do I have to receive in order to claim
contact? Is one
bit/blob of energy at the right time/frequency good enough,
or do I have to
demodulate the signal and extract a few bits of data?
Marconi claimed credit for the first transatlantic
communication by sending the
letter S in Morse code. That sounds like a fine standard -
one byte of data.
It's statistically significant.
With regard to the restoration and use of a derelict radio
telescope for amateur
radio, that's a fine example of amateurs putting themselves
to a big task and
succeeding. I work on radio telescopes, so I know how big a
task that is.
--David Forbes
------------------------------
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--
Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com
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