4 to 5 kHz VLF Receiver Article

A vintage radio website has made available an article from Radio Constructor magazine describing a Very Low Frequency (VLF) receiver for 4 to 5 kHz.

In 1963, Radio Constructor magazine published a design for a two transistor detector for Nuclear and Rocket firings and the next day's weather, see
http://vintageradio.me.uk/electronics/detector_nuclear.htm

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