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World’s Most Complicated FM Radio [RTL-SDR]
After many hours of trial and error, I’ve turned my computer into one of the most complicated FM radios imaginable – and it’s nearly free. With just a cheap ($20) TV tuner based on the Realtek RTL2383...
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DIY SDR HF Up-Converter by WA7JHZ: Another good choice for your RTLSDR.
Reader David Forsman, WA7JHZ, read the round-up of RTLSDR upconverter choices and sent me a photo and build schematic of one he designed which was featured in the January 2013 issue of QST, the ARRL‘s...
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KN0CK HF Upconverter Fits Inside the USB Tuner’s Enclosure
Marty KN0CK sent me some details to publish about his great looking miniature HF upconverter board for the RTLSDR, the HF Alchemy DVB-T Active HF Upconverter. It’s an incredibly miniature SMT board...
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Coming Soon: KN0CK Rev B Integrated HF RTLSDR
Marty KN0CK developed a very interesting v1.0 HF converter based on surface mount technology that fits inside the casing of an RTLSDR tuner dongle. He’s recently sent me schematics for the revision,...
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Australian TV Tuner Offers 4 RTLSDR Tuners in One Internal Card
Over at RTL-SDR.com is a report of a fascinating development with the DigitalNow Quad DVB-T Receiver, apparently well suited to working as a very powerful multi-SDR solution. I just wanted to let you...
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Listen to Ham Radio Online with the ETGD WebSDR
I just discovered the fascinating Wide-band WebSDR operated by the amateur radio club ETGD at the University of Twente in the Netherlands. PA3FWM built a fascinating wideband SDR using a Xilinx FPGA,...
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Colorful NTIA Poster of U.S. Frequency Allocations
This great infographic looks like it could really help me figure out who’s talking on all of those data channels I pick up with my RTLSDR. Click through for the full size, a 3.5MB JPEG. You could also...
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Introducing Easy-Kits!
I’m proud to announce a new venture from KF7LZE in partnership with KF7LZR! Easy-Kits strives to provide easy to find parts to complete the projects you find on my site, not to mention offering other...
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KN0CK HF Converter Rev. 4 is Released!
The complete Rev 3 KN0CK HF Converter has sold out and been discontinued. That’s okay, though, because it’s been replaced with the KN0CK RTLSDR for HF Revision 4! This model incorporates a lot of the...
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KN0CK Amplified RTLSDR for HF Rev. 5 is Back!
After some technical difficulties, the KN0CK Amplified RTLSDR for HF Rev. 5 is back! Now for sale directly through blog.KF7LZE, and including free shipping in the United States, and a free PAL to BNC...
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