Long range video and audio transmission ~ 20,000 feet - AVS Forum
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post #1 of 5 Old 08-08-2013, 09:43 AM - Thread Starter
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Hi all.

Anyone know of a way to send video and audio signals wireless with a range of about 20km?

We would only need SD video coming from a camera. And it would have to be quite light weight and run off a 12v system for the transmission equipment.

This is more of a hobby thing so can't spend a ton on it. So looking to go real DIY on this one to bring the cost down, would even be prepared to build circuit boards.


Thanks

Jack,
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post #2 of 5 Old 08-08-2013, 01:52 PM
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AFAIK in the USA what you want to do requires a license of one sort or another.

There are amateur radio enthusiasts that do it. Here is a link that will give you an idea of what is involved.
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post #3 of 5 Old 08-08-2013, 04:34 PM - Thread Starter
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Thanks for that link.

I am in the UK and the transmission would only be a few hours.

We don't use analogue anymore so probably not going to bother getting permission for the band.

Thanks again!
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post #4 of 5 Old 08-08-2013, 06:31 PM
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If its" line of site" there's tons of info online about long range wifi. It can be as simple as using 2 old Dish Network dishes pointing at each other. You could have a slingbox on one end of a really long wifi network.
Although you mentioned 12v so I'm thinking there isn't any power right? And under $100? Maybe I don't have any ideas after all.
What about a cell phone with unlimited data? Skype?
A neighbor with wifi?

If your buying a new projector, buy more lumens than you will use. Running it in "Eco Mode" makes your bulb last 20-40% longer and reduces noise and heat.
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post #5 of 5 Old 08-09-2013, 03:07 PM
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Run the camera output into an old VHS recorder, then the channel 2,3 or 4 output into a big VHF antenna, at the far end another big VHF antenna.
Sure it's not technically legal, but just who would you interfere with?

This should work at 20 000 feet ( 4 miles) but not 20 kilometers (12 miles).

Kevin
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