Steve N8NM has been pushing the limits of radio hybridization. In this receiver he has 12AX7 thermatrons running alongside an Arduino and a Si5351. Somehow I find this both very appealing and deeply disturbing. Many of you will know what I mean. But FB Steve -- keep them coming. Put these unique rigs on the air and strike a blow against the Yaesu-Icom-Kenwood monotony! Bill: Here's a pic of a Thermatron-Meets-Silicon receiver that I've been working on. Tubes are 12AT7 mixer, 2x6BA6 IF amps, 2x12AX7 (product detector, AGC amp and 1st AF) and 6AQ5 audio out. An Arduino controlled Si5351 provides the LO and BFO as well as handling all of the switching, and the mixer and product detector use variations on Dr. Pullen's dual-triode circuit. I've had this one on the air, but the hardware and software still need some, um, refinement. And painting the panel has to wait until spring as my XYL doesn't share my affinity for paint fumes.
In response to popular demand, "SolderSmoke -- Global Adventures in Wireless Electronics" is now available as an e-book for Amazon's Kindle.
Here's the site:
For the print version:
For shipping from a printer in the U.S. (probably better for N. American buyers) Click here: SolderSmoke USA Version
For shipping from a printer in the UK, Spain, or the USA (probably better for UK and other European buyers)
Click here: SolderSmoke EU Version
The two versions are identical, except for a minor difference in the paper used. That's why the prices are a bit different.
Bill's OTHER Book (Warning: Not About Radio)
Click on the image to learn more
W4HBK's QRSS Grabber: The Amazing Pensacola Snapper (Live!)