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01 May, 2010

Pixie sidetone oscillator and reduced broadcast interference

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This circuit provides a sinusoidal sidetone oscillator for the Pixie. As an added benefit, it will also cause reduced broadcast interferenc...
01 March, 2010

Magnetospherically ducted echo

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Magnetic field lines in the magnetosphere (Ill. NASA) Signals in the 1.8 - 4 MHz range may pass the ionosphere and be ducted in the mag...
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02 February, 2010

Three paths from Japan to Norway along the grayline

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The Japanese station JA3YBK was received in Oslo ( press here for audio ), 30. November 2003, 08:20 UTC on 21.004 MHz during the CQ Worl...
31 January, 2010

Propagation via aurora reflection

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Northern Lights in Tromsø, Norway  Here is a recording of the Swedish station SM6CNN in contact with me on 29. October 2003, 22:42 UTC ...
30 January, 2010

Polar flutter

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Arctic areas Here is a recording of JW/DJ3KR on Spitzbergen from 24. August 2007, at about 21:45 UTC. This was only a few minutes after...
28 January, 2010

Moonbounced echoes on 6792.5 and 7407.5 kHz

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Recently, a facility with big enough antenna (300 by 365 m) and high enough power (3.6 MW) was used to set a new record for how low in fr...
27 September, 2009

K2 Fixed Level Audio Output

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I started by making a very simple modification for a low level audio output with level that was independent of the AF pot setting. T...
06 June, 2009

My Elecraft K2 Modifications

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When I got my license in 2001, I discovered the Elecraft K2 transceiver on the internet and noticed the excellent reviews that it had rec...
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