Category Archives: DIY

DIY SDR HF Up-Converter by WA7JHZ: Another good choice for your RTLSDR.

Posted on February 2, 2013 by jwk

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 monthly magazine. This circuit up-converts … Continue reading →

Posted in DIY, Electronics, Projects, Radio | Tagged , , , , , , , | 2 Comments

Round-Up of RTLSDR Upconverter Choices

Posted on September 14, 2012 by jwk

1/31/2026: This was originally written in 2012 and hasn’t been updated since 2014, but it’s preserved here in case any of the information is useful and to show the state of the ecosystem when RTLSDR first came on the scene. … Continue reading →

Posted in Collections, DIY, Electronics, Radio, Radios and Tubes | Tagged , , , , , , , , , , , , , , , , , , , , , , , , , , , , | 49 Comments

New Project: Jamo MPA-101 Amplifier Repair

Posted on August 1, 2012 by jwk

Project’s Conclusion Here My friend brought me this Jamp MPA-101 amplifier he picked up at a garage sale, complaining in only puts out some rumbling and humming. It looks like it’s suffered a failure in the power supply at some … Continue reading →

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Dell Inspiron 1545 with Broken LCD Screen – Dumpster Laptop Repair

Posted on June 22, 2012 by jwk

My apartment has what I like to affectionately call the “free pile”, where neighbors leave things they were throwing out but might have too much value to throw in the compactor outright. I’ve left a few things there myself, and … Continue reading →

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