Showing posts with label sub-9khz. Show all posts
Showing posts with label sub-9khz. Show all posts
6 Feb 2023

Sub 9kHz amateur radio

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At one time I was very active monitoring amateur radio below 10 kHz. Stations from all over Europe were decoded. I also used to regularly ru...
2 Apr 2021

Sub-9kHz amateur radio

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Some years ago I experimented on amateur radio below 9kHz. To receive amateur radiated signals at range needs very stable TX signals, very n...
15 May 2020

Sub-9kHz amateur radio

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One of the websites I host is the Sub 9kHz Amateur Radio  page. This tries to have recent news although many times it is better to look on t...
22 Jan 2020

Sub-9kHz amateur radio on TV

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How good is your German? A recent ARD TV program had a bit on sub-9kHz amateur radio. Even though my German is almost non-existent it was...
16 Dec 2019

Sub 9kHz amateur radio

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These days a dedicated bunch of amateurs continue to "push the envelope" by experimenting below 9kHz. At one time though getting o...
1 Feb 2018

Sub 9kHz amateur radio

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Although far from perfect, I try to keep up with the latest news about amateur radio below 9kHz. Quite a lot is happening. Surprisingly,...
27 Feb 2017

Amateur radio below 9kHz

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Until a few years ago, the conventional wisdom was that you needed huge power and huge antennas to be copied "beyond the garden fenc...
28 Mar 2013

Amateur DX Europe to Alaska on VLF?

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There has been some excitement over the last few days as Lawrence KL1X has seen a signal on 8.9700kHz when the noise was low that just coul...
22 Oct 2010

8.7 to 9.1kHz NoV received

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This morning I received my NoV from OFCOM to operate legally around 9kHz (see copy on RHS - click to enlarge). Details are: 1yr duration ...
5 comments:
27 Sept 2010

Sub-9kHz Amateur Radio group: 100+ members already

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Since creating this new group on Saturday it already has over 100 members. Now we need to see some postings from people actually doing activ...
25 Sept 2010

Sub-9kHz Amateur Radio (Yahoo group) formed

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This new group is for anyone interested in amateur radio communications below 9kHz in the so-called "Dreamer's Band".  See ht...

VLF DX transmission with earth electrode transmission (49.6km)

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DK7FC's 8.97kHz DFCW transmission received at 49.6km Stefan DK7FC has informed me that he has successfully transmitted the message &q...
24 Sept 2010

More sub-9kHz experiments

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Just received this from Stefan DK7FC: Dear LF/VLF, Today i saw the first time a flag from Norway on my VLF Grabber ( http://www.iup.uni-...
14 Sept 2010

Sub 9kHz NoVs - a step nearer

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The current UK applications for sub-9kHz NoVs have now been forwarded to the Met Office and I understand they have been received. With luck ...
17 Jun 2010

Diagram of my earth electrode antenna for 500kHz and sub-9kHz

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This is a hand drawn diagram of my earth electrode antenna for 500kHz and sub-9kHz. On 500kHz WSPR this has managed to TX a signal as far as...
1 comment:
11 May 2010

4W TX for sub-9kHz experiments

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Attached is a picture of the "transmitter" I'm using for my ground and induction communications tests. It uses a TDA2003 audi...
2 comments:

VLF loop and up-converter ready for tests

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This is a shot of my receiving loop antenna for sub-9kHz local earth-mode and induction comms testing. The loop consists of 30 turns of wire...
9 May 2010

Sub-9kHz NoV - still awaiting Met Office OK

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I chased Rod at OFCOM this weekend to see if there was any further news on the NoV application to TX below 9kHz. The hold-up is still the Me...
13 Apr 2010

Talk request from Peterborough CLub

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Having given a talk about "kitchen sink" simple radio last year, the good folks at Peterborough have kindly invited me back to tal...
19 Mar 2010

Sub-9kHz NoV application being processed

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Rod Wilkinson confirmed that he's received my application today at OFCOM: Hi Roger, Many thanks for your email and you will be pleased...