SWL’ing Missile Launches and Nuclear Blasts

Screenshot 2023-01-24 12.58.51 PMSixty years ago this month, the British Radio Constructor carried the plans for this interesting project, suitable for monitoring missile launches. Or, if you were lucky and happened to be tuned in at the right time, you could hear the signature RF signals of a nuclear blast going off!

The project itself was quite simple.  It consisted of a loop antenna, feeding to a one-transistor ELF detector and one stage of audio amplification.

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