[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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