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zh311/08/20244 repliesview on HN

If you're into receiving low frequency time signals, you can receive them directly with nothing more than a piece of wire connected to the mic input of a modern sound card (via a capacitor). Sample at 192kHz and downsample in software (simplest: mix with a similiar frequency sine and listen to the result, say 59kHz for WWVB or MSF).


Replies

aidenn011/08/2024

Really just a piece of wire? I would have thought that there would be too much noise to pick up WWVB without a somewhat more selective antenna (loopstick maybe?)

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elzbardico11/08/2024

The 2024 version of the crystal radio. :-D

accra4rx11/08/2024

are there any good circuits for radio transmitter (circuit for low freq esp 60KHz)

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