[amsat-bb] Re: Allocations in L-band

[Edward R Cole]

It was AO7 and the freq was 2304 MHz and not 1260.  Because the 
frequency was set in the weak-signal band with no allocation for 
space-com the system was never activated.  A huge disappointment to 
the members of the SBMS that designed and built it.  Politics!

I was a member of the sbms during that time.

Ed - KL7UW, ex K8MWA and ex amsat #3212

At 07:31 PM 11/20/2012, Greg D wrote:
>I believe it was Oscar-7.
>
>Greg  KO6TH
>
>
>Alan wrote:
>>Someone years ago told me that one of the early amateur satellites had a
>>mode-L beacon, but because the rules changed, it was never turned on.  I
>>haven't been able to verify or disprove this story.
>>
>>Alan
>>WA4SCA
>>
>>
>>-----Original Message-----
>>From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
>>Behalf Of Trevor .
>>Sent: Tuesday, November 20, 2012 4:10 AM
>>To: amsat-bb at amsat.org
>>Subject: [amsat-bb] Re: Allocations in L-band
>>
>>--- On Mon, 19/11/12, Richard Ferryman<g4bbh at btinternet.com>  wrote:
>>>Just curious - Can someone enlighten me as to why there is no allocation
>>>for satellite downlinks in L-band (at least in the bandplans I have seen).
>>>There are uplinks around 1267 to 1269 MHz. Is it due to possibility of
>>>interference with commercial/military/aeronautical systems?
>>I believe it dates back to a WARC conference in about 1971. Prior to that
>>the Amateur Service had I believe been able to use any Amateur Frequencies
>>just as they can still do for that other form of Space Communication - Moon
>>Bounce (EME).
>>
>>Wayne Green W2NSD does make references to the loss of satellite frequencies
>>a few times in his column in 73 Magazine from that era, see 73 Mag archive
>>at http://archive.org/search.php?query=73%20magazine
>>
>>Although a separate service, the Amateur-satellite Service, was created they
>>were only given access a limited sub-set of the Amateur Service frequencies.
>>For the UHF and Microwave bands the satellite segments were all remote from
>>the terrestrial weak-signal segment meaning separate equipment had to be
>>built to work satellites. Back in those days even 435 MHz would have seemed
>>"remote" from the 432 MHz weak-signal area due to the use of 28 to 432 MHz
>>transvertors that only covered a narrow 2 MHz segment of the band. We share
>>432-438 MHz with commercial SAR satellites but why in the 70's we weren't
>>allowed to use the whole of 432-438 I do not know. Maybe no-one thought to
>>ask for the whole segment ?
>>
>>The same with 1260-1270, why it's there I don't know perhaps someone can
>>enlighten us. The band 1260-1300 MHz is used for wideband Global Positioning
>>transmissions from Galileo, see
>>http://www.southgatearc.org/articles/galileo.htm
>>
>>Do restrictions that were applied to the Amateur-satellite Service 40 years
>>ago (but not to Moonbounce) still have any relevance today ? again I don't
>>know.
>>
>>Ideally the Amateur-satellite Service should have access to the weak-signal
>>segments of all the UHF and Microwave bands for both Earth-to-Space and
>>Space-to-Earth so we would only need to build one set of equipment on each
>>band for both terrestrial and satellite working. It would be good if IARU
>>were to work towards that objective.
>>
>>73 Trevor M5AKA
>>
>>
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>>
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>_______________________________________________
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