electronics and telecommunication

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Offline theCoolScientist

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electronics and telecommunication
« on: 20/03/2015 03:08:35 »
what is the most efficient and sensitive way of detecting VLF?

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Offline Colin2B

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Re: electronics and telecommunication
« Reply #1 on: 20/03/2015 05:23:53 »
what is the most efficient and sensitive way of detecting VLF?
Buy a kit

Are you interested in atmospheric effects, radio astronomy, or long distance comms? I suspect latter from your thread title (which should be altered to a question).
Most countries have a radio ham or astronomy group interested in this band so you might find one locally.

Never tried it myself, but always been interested in the results. These links might help.

http://www.ukraa.com/www/

http://www.lwca.org/

http://rsgb.org/main/technical/propagation/vlf-propagation/

http://theinspireproject.org/default.asp?contentID=3
and the misguided shall lead the gullible,
the feebleminded have inherited the earth.

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Offline theCoolScientist

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Re: electronics and telecommunication
« Reply #2 on: 20/03/2015 05:31:23 »
thanx man

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Offline evan_au

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Re: electronics and telecommunication
« Reply #3 on: 20/03/2015 10:34:48 »
Having a good antenna and a good earth connection helps a lot.
Efficient antennas are about half the wavelength - but this can become impractically large with VLF, so in general, bigger is better.

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Offline Colin2B

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Re: electronics and telecommunication
« Reply #4 on: 20/03/2015 13:05:58 »
Having a good antenna and a good earth connection helps a lot.
Efficient antennas are about half the wavelength - but this can become impractically large with VLF, so in general, bigger is better.

Some people use coils of wire connected to a computer sound card. Coil needs to be placed away from interference sources, and there are a lot at these frequencies.
and the misguided shall lead the gullible,
the feebleminded have inherited the earth.