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).

Reply to this comment

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.

Reply to this comment

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

Reply to this comment

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.

Reply to this comment

Subscribe to MAKE Magazine!

Subscribe today, save 42% and get web access to MAKE free. MAKE Digital Edition is available only to subscribers.

$34.95 / 1 year
(4 Quarterly Issues)

Subscribe now

Void your warranty, violate a user agreement, fry a circuit, blow a fuse, poke an eye out. Make: The risk-takers, the doers, the makers of things... Welcome to Make: Online!

More guides: Santa Claus Machines, Geek Toys for Grown Up Girls & Boys

Check out all of the episodes of Make: television

Connect with MAKE

	MAKE on Facebook Visit our Facebook page and become a fan of MAKE!
	MAKE on Twitter Follow our MAKE tweets!
	MAKE on Flickr Join our MAKE Flickr Pool!

make_tips on Twitter

Why advertise on MAKE?
Read what folks are saying about us!

Click here to advertise on MAKE!

Make: Online authors!

Gareth Branwyn
Senior Editor

Phillip Torrone
Senior Editor
| AIM | Twitter

Becky Stern
Associate Editor
| AIM | Twitter

Marc de Vinck
Contributing Writer
| AIM | Twitter

John Park
Contributing Writer
| Twitter

Sean Ragan
Contributing Writer
| Twitter

Matt Mets
Contributing Writer
| AIM | Twitter

Dale Dougherty
Editor & Publisher
| Twitter

Shawn Connally
Managing Editor
| Twitter

Goli Mohammadi
Associate Managing Editor

Kip Kay Kip Kay
Weekend Projects
| AIM | Twitter

Collin Cunningham
Contributing Writer
| AIM | Twitter

Adam Flaherty
Contributing Writer
| AIM | Twitter

More contributors: Mark Frauenfelder (Editor-in-Chief, MAKE magazine), Kipp Bradford (Technical Consultant/Writer), Chris Connors (Education), Diana Eng (Guest Author), Peter Horvath (Intern), Brian Jepson (O'Reilly Media), Robert Bruce Thompson (Science Room)

Suggest a Site!

Current Podcast

Weekend Project: Beetlebot Simple robot from your parts bin that avoids obstacles. Thanks go to Jerome Demers for the original article in MAKE, Volume 12. To download the Beetlebot video, click here or subscribe in iTunes. Check out the complete Beetlebot article... More...