[time-nuts] nubie querie (Earth Venus Earth, done!)
Dave Baxter
dave at uk-ar.co.uk
Thu Mar 11 08:58:09 UTC 2010
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 <dforbes at dakotacom.net>
> Subject: Re: [time-nuts] nubie querie
> To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
> Message-ID: <4B980FF1.7040508 at dakotacom.net>
> 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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