[amsat-bb] Re: 25 watt Moonbounce

[Trevor]

Hi Joe, 

Glad to hear about your low power moonbounce, contacts at those power levels
would have been unthinkable 20 years ago.  

I think what made the contact by Angus all the more remarkable was that it's
reported he was just using a single 7 element yagi in his attic so would suffer
additional attenuation from roof tiles. 

73 Trevor M5AKA

--- Joe <nss at mwt.net> wrote:

> Not to take anything away from Angus, and Yes this is indeed a great 
> accomplishment, but hardly from new.
> 
> Myself have done this  many times with a tad bit more power, 35 to 40 
> watts. And this was in the days of no fancy software's or anything like 
> that just antenna,  rig, a nd good headphones.
> 
> I worked 18 different stations off Oscar 0  (Moon)  back in the late 
> 80's  My station was a
> Kenwood TS-700,  10 watts into a Mirage 40 watt  amp  that was tired and 
> only put out 35 or so watts.
> feed line was 1/2" heliax that was about 100  feet long,
> no Pre-amp for receive,
> antennas were 8 element yagis, W1JR design (4 of them)
> 
> standard WIDE  SSB filters on receive, and a set of headphones.  That's it.
> 
> One thing that DID  make a HUGE difference I think on my system, was i 
> was able by the design of my array I was able to rotate polarity of the 
> beams along their axis.  Granted,  the spacing was optimum when they 
> were horizontal,  but and were wrong in other polarities,  but the gain 
> it made making sure the polarity was right after faraday happens was 
> incredible. every 5 minutes or so i'd have to change the polarity to 
> optimize the signal.
> 
> 18 different stations in a little over 2 weeks  or so of operating,  who 
> knows how many I could have worked, but will  never know due to  going 
> qrt off  the moon because a Kenwood TS-700  doesn't really like 110 VAC  
> being applied to the 12VDC input.
> 
> Joe WB9SBD
> 
> Trevor wrote:
> 
> >The story in the UK Scarborough Evening News about Angus Young M0IKB
> achieving
> >Moonbounce with just 25 watts is a good illustration of the huge advances
> >Amateurs have made in Moonbounce techniques over recent years. Not long ago
> it
> >would have taken over 400 watts to achieve it. 
> >
> >Why Angus is over the Moon - Scarborough Today (with picture of Angus) 
>
>http://www.scarborougheveningnews.co.uk/news/Why-Angus-is-over-the.3686368.jp
> 
> >
> >Ham makes EME contact with just 25 watts
> >http://www.southgatearc.org/news/january2008/record_eme_contact.htm 
> >
> >The call book entry for Angus Young M0IKB can be seen at 
> >http://www.eham.net/callbook/M0IKB 
> >
> >73 Trevor M5AKA
> >
> >
> >
> >
> >
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> >
> >
> >  
> >
> 



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