Make: Online : Build a QRSS (extreme slow speed continuous wave) transmission detector

Build a QRSS (extreme slow speed continuous wave) transmission detector

Hans2
This month's Gadget Freak comes courtesy of investment banker Hans Summers. He built a simple receiver capable of detecting QRSS transmissions on a fixed frequency. The QRSS receiver is powered by a computer's USB port and the audio output feeds into the PC's sound card. Hans used a toroidal transformer as matching and input filter, connected directly to a 30m (10MHz) dipole antenna and a useful oscillator/mixer IC as a crystal oscillator and mixer. Link.

Comments

Oldest comments listed first.

Posted by: monopole on July 18, 2007 at 1:31 PM

Very neat stuff.
But one little thing does annoy me. Why, when a neat project has a lot of interesting technical images (the scope trace, the neat little mint box case etc.) do we get a picture of a guy making a goofy face (call it the Bre Pettis effect).

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Posted by: GarrettM on July 18, 2007 at 1:57 PM

monopole: Because there are other websites you can visit to focus on the gritty details. MAKE concentrates *at least* as much on having fun as they do on the actual technology.

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Posted by: frame on July 18, 2007 at 2:54 PM

what use technology without people? i love nerd porn.

http://xkcd.com/c291.html

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Posted by: doublepluselliot on July 20, 2007 at 3:03 PM

...get a picture of a guy making a goofy face (call it the Bre Pettis effect)...

Nah. It's the Gadget Freak effect. They always have these goofy stories and funny pictures. It's part of their style.

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