sending a signal into space

Licence free two-way radio services that now includes both FM and digital channels. Discuss models, modifications and other similar worldwide standards such as FRS and GMRS.
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StormShadow
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sending a signal into space

Post by StormShadow » 31 Jul 2015, 20:12

Hi there. I know that this may seem pointless to most, but I have been thinking about moon bouncing and wanted to play some music into space.... I'm a ham but seeing that music is not allowed on the ham bands then maybe I could do something with pmr446 and use a yagi beam to see if I can bounce some music of the moon on 446 and possibly just beam some music into space in general? I'm just wondering what kinda power I'd need to do this and learn a bit more on the characteristics of UHF to whether the signal would penetrate the Earths atmosphere in order to get the signal to successfully travel through space?

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Re: sending a signal into space

Post by BK » 31 Jul 2015, 20:34

Just google 70cm EME to see what sort of setups people are using for moonbounce at UHF. Voice/music isn't particularly practical as it would require a lot of power and a stonking big antenna, CW is a slightly more manageable, and the slow digital modes like JT44/65 make it even more achievable, putting EME within reach of most amateurs (although it still requires more of an antenna than I've ever owned).

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Re: sending a signal into space

Post by Windy_Miller » 01 Aug 2015, 09:11

StormShadow wrote:....seeing that music is not allowed on the ham bands then maybe I could do something with pmr446 and use a yagi beam..... I'm just wondering what kinda power I'd need to do this.....
If you are concerning yourself with legalities, then what you propose for PMR446 is as illegal as what you considered for ham.

Just go for the ham band. Its full of unused frequencies. Legitimate PMR446 users only have 8 to use, and having high powered music coming over a frequency whilst they are going about their daily business will not be too welcome I don't expect!

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Re: sending a signal into space

Post by Admiral » 01 Aug 2015, 09:31

Most signals end up in space eventually.

The Earth is a ball of dirty RF, I won't be too surprised if the little green men aren't here to try and put some RF chokes across our planet.
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Re: sending a signal into space

Post by kr0ne » 03 Aug 2015, 09:48

Why music? If it's to entertain aliens, I'm sure they get plenty on UK19 as it is...

If sending radio signals into space interests you though, why not try for some satellite voice contacts? You've got a decent shot at making those happen, even without fancy pants antennas and massive amplifiers... ;)

http://www.amsat.org/xtra/Getting%20Started%201.pdf

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Re: sending a signal into space

Post by Windy_Miller » 03 Aug 2015, 16:42

Must be a lot of music out there already - Hmmm, all those broadcast transmitters pumping out up to 150 kW per "station" 24/7/365. Aliens must have an almost endless choice of listening!

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Re: sending a signal into space

Post by BK » 03 Aug 2015, 18:10

kr0ne wrote:If it's to entertain aliens, I'm sure they get plenty on UK19 as it is...
Not to mention that gold plated porn we sent them on the pioneer probe.

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Re: sending a signal into space

Post by kr0ne » 03 Aug 2015, 23:11


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Re: sending a signal into space

Post by Farty » 04 Aug 2015, 08:13

Windy_Miller wrote:Must be a lot of music out there already - Hmmm, all those broadcast transmitters pumping out up to 150 kW per "station" 24/7/365. Aliens must have an almost endless choice of listening!
Only those that didn't go digital.
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Re: sending a signal into space

Post by Mattylad » 04 Aug 2015, 10:22

I would not be sending music into space, because you will also be sending it elsewhere too and will soon become the boo man.
Put together some recordings of sounds in a binary form, a certain tune comes to mind.
It may help if you can funnel your signal to keep it clear of interference so if you can find an old volcano\hollow mountain you can do it from in there.

Hmm, sounds like you could make a film about this lol

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Re: sending a signal into space

Post by Mark-in-Essex » 04 Aug 2015, 17:03

Max Romeo=Legend :thumbup: :thumbup: :thumbup:
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Re: sending a signal into space

Post by superdave » 06 Aug 2015, 06:19

Music is allowed on ham bands.

I've looked into moonbounce and you need a whopping great directional antenna and a lot of power. You can apply for an NoV from Ofcom which will allow you to greatly exceed the maximum power level of your licence in order to do moonbounce. One of my mates has a 22 element yagi for UHF. If we could get a kilowatt of RF into it I'm sure we could achieve moonbounce no problem, especially with something like WSPR.

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