Crystal Sets? Yup, you’ve found an entire site about building Crystal Sets. The Society has been growing since 1991; still, some people are flabbergasted to find an entire society dedicated to Crystal Set radios or "Xtal Sets". One web surfer e-mailed, "I was so excited to find your site that I fell off my chair! "The Xtal Set Society publishes a newsletter and numerous books, all of which you can find more information about on this site. A listing of newsletter articles from 1993 through 2007 can be found on the Technical Articles Page. Click on the earphones to browse and enjoy our site. --Patricia, The Crystal Queen Mum, Editor, Xtal Society News. Site last updated 01-26-2010.
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We'll have a booth at the (amateur radio) Orlando FL "Hamcation" Feb 12-14, 2010. Stop by and see us at booth #73 in arena 2! The convention is held at the Central Florida Fairgrounds, 4603 W Colonial Dr, Friday-Sunday. We'll bring parts, kits, and books for show and sale. Phil, WØXI, will present a seminar on "Intro to Ultrasonics." The January 2010 newsletter - Vol 20, No. 1 of 6! - mailed 12-31-09. The wrapper has been updated and the following articles included: Fun With Homebrew Cuprous Oxide Diodes (Part I of II) by HP Fredrichs, AC7ZL. Resistance of Hardboard Revisited & Use in Crystal Sets, by Phil, WØXI, The Telefunken Crystal Set, by Dan Petersen, W7OIL - with discussion of Prof "Schlecht's Radio School" :), and member correspondence. Part II of HP's article is typeset for the March 2010 issue. Welcome beginners! You'll find links to FAQs, science fair suggestions, and introductory articles on the left. Our Oat Box Radio Kit is a favorite, a great place to start. Order via the Kits page. J.K. Fenton has written "Building Your First Crystal Radio," 5-1/2 by 8-1/2, 15 pages. See the bookstore page to order.
Our new Ultra-QP 40 kHz ultrasound transceiver is shown above. See the ultrasound pages for a description of the unit and kit. |
Our new My Marconi Shortwave Receiver Kit for the 49-meter band is shipping. It features a single-tuned circuit wound on a PVC form, lexan front, and 2-transistor amplifier which accommodates an earphone or hi-Z headphones. See the kits page and the September 2009 Newsletter article by Dan, W7OIL, for details.
Also check our our popular MY MARCONI AM band receiver kit. It' a double-tuned crystal set, including an antenna tuner, toroidal coils, and lexan front panel.
Volumes 14 & 15 of the newsletter have been newly compiled; we've titled it "Detectors, Amplifiers, Headphones, and More: Vol 14 & 15 of the Xtal Set Society." |
See our 365 variable cap with 8:1 built-in reduction drive and the stand-alone 6:1 reduction drive on the parts page. Reduction drives gear down the rate the capacitor plates move relative to knob motion. A mounting bracket is available for the reduction drive, matching it up with our single or dual-gang capacitors.
