XPost: rec.radio.amateur.moderated, uk.radio.amateur, free.uk.amateur-radio
Roger G3XBM's (Mainly) Amateur Radio Blog
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VLF Earth-mode
Posted: 14 Oct 2021 11:25 PM PDT
http://g3xbm-qrp.blogspot.com/2021/10/vlf-earth-mode.html
This was 2012. 6km was spanned below 10kHz through the ground. My stroke
got in the way!
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Sunspots - Friday October 15th 2021
Posted: 14 Oct 2021 11:16 PM PDT
http://g3xbm-qrp.blogspot.com/2021/10/sunspots-friday-october-15th-2021.html
Solar flux is 83 and the SSN 24. A=7 and K=2.
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472kHz ATU
Posted: 14 Oct 2021 09:38 AM PDT
http://g3xbm-qrp.blogspot.com/2021/10/472khz-atu.html
There is a common misconception that 472kHz ATUs have to be big. With low
power this is not the case. With my 5W I have had no problems at all with a tapped ferrite rod as the photo shows. With the outer of a coax this makes
a very simple 472kHz station. The 50 ohm connection is very low down and
the wire will be much further up the rod.
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