[amsat-bb] Re: 25 watt Moonbounce
m5aka at yahoo.co.uk
Mon Jan 28 23:58:30 PST 2008
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
> >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
> >would have taken over 400 watts to achieve it.
> >Why Angus is over the Moon - Scarborough Today (with picture of Angus)
> >Ham makes EME contact with just 25 watts
> >The call book entry for Angus Young M0IKB can be seen at
> >73 Trevor M5AKA
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