Every Possible Radio Callsign
KAAA, KAAB, KAAC, KAAD, KAAE, KAAF, KAAG, KAAH, KAAI, KAAJ, KAAK, KAAL, KAAM, KAAN, KAAO, KAAP, KAAQ, KAAR, KAAS, KAAT, KAAU, KAAV, KAAW, KAAX, KAAY, KAAZ, KABA, KABB, KABC, KABD, KABE, KABF, KABG,...
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Corn-cob Radio
Crystal radio, built into a corn-cob pipe – from Popular Science, volume 101, #3 (Sept 1922). Via: Wikipedia user Dicklyon
View Article“Japanese Slot Machine”
The weirdly musical signal from the “Japanese Slot Machine” station, thought to be broadcasting from the Japanese Navy. Via this very comprehensive list.
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A Few Historical Random Number Generators
A few historical random number generators. From top to bottom: Galton’s dice (capable of 24 digits instead of the usual 6), a Type 1390-B Random Noise Generator (runs on 6D4 tubes and was likely the...
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Racal MA-4204 Time Division Voice Scrambler
Another device using random acoustic noise for cryptographic purposes. This device from the early 1970s randomly rearranges the audio signal every half-second; a corresponding unit puts the audio back...
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Weather Fax Over Ham Radio
A weather report “fax” sent by ham radio (more examples and details here).
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SDR/HackRF One: Mac Setup and Basics
The HackRF One is a very nice software-defined radio (SDR). Though a good bit more expensive than other SDR hardware, it is very well made and Michael Ossmann of Great Scott Gadgets has put together...
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Paeansonic Radio
A “Paeansonic” radio from eBay – a paean is a “song or lyric poem expressing triumph or thanksgiving“. A pretty great way to beat copyright and suggest the poetic qualities of your FM radio.
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Every FM Radio Station Rendering
Rendering of a piece to (hopefully) be made soon: 93 handmade radios, playing every possible FM station. The piece changes completely when installed in a new city.
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Radiofax
Weather maps sent via shortwave radio. Started in the 1950s and still running today, available by FTP on the NOAA site.
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