22 Jul 2020

VLF tests in Devon

A couple of stations in South Devon, G3WCB and G4IUG are doing some tests with sub-10kHz transmissions with earth-electrodes. They can use high power and GPS lock. So far they have covered 1km with Hellschreiber. They can cover far further. It would not surprise me if they were spotted by Paul Nicholson in Yorkshire as long as they can send a long stable signal that can be integrated. This may need days of integration.

See https://sites.google.com/site/sub9khz/news20 for more information.
at 06:37
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6 comments:

g4apb said...

Hi Roger, do you have anymore information on this please.

73 Ken G4APB

Wed Jul 22, 07:26:00 am GMT+1
Roger G3XBM said...

Hi Ken, I have updated the blog post to point to https://sites.google.com/site/sub9khz/news20 which has more news on these tests.

Wed Jul 22, 03:11:00 pm GMT+1
Anonymous said...


Do they have a valid NoV for this - I doubt it - 8.27 is not a free-access band in the UK.

Wed Jul 22, 10:20:00 pm GMT+1
Roger G3XBM said...

If earth mode I think you will find OFCOM are not interested.

Wed Jul 22, 10:30:00 pm GMT+1
Roger G3XBM said...

OFCOM only seem interested if billions of pounds involved. In my personal experience they were not that knowledge able.

Wed Jul 22, 10:33:00 pm GMT+1
Roger G3XBM said...

Below 10kHz I reckon serious experimenters know FAR more than most at OFCOM ever will about RF.

Wed Jul 22, 10:44:00 pm GMT+1

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