Build your own QRSS detector

Andre Kesteloot andre.kesteloot at
Thu Jul 19 15:17:24 CDT 2007

Thanks for finding this cute project.
In fact the link that actually leads to the schematic appears to be broken.
Here is a link that works
André N4ICK

Kevin P. Inscoe wrote:
> "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."
> ------------------------------------------------------------------------
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