Build your own QRSS detector

[Andre Kesteloot]

Kevin
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
73
André N4ICK
********************************************

Kevin P. Inscoe wrote:
> http://www.makezine.com/blog/archive/2007/07/build_a_qrss_extreme_slow.html?CMP=OTC-0D6B48984890
>
> "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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