Spring is not far away; get your antenna projects ready! And consider mapping out some field trips to listen to bats chat and hunt using one of our ultrasound kits!
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, numerous books, and has parts and kits for purchase. A listing of newsletter articles from 1993 through 2007 can be found on the Technical Articles Page. Click on the earphones at left to browse and enjoy our site. You'll notice we've added parts, kits, and articles on ultrasound too, starting in 2009. --Patricia, The Crystal Queen Mum, Editor, Xtal Society News. Site last updated 02-18-13.
We are now stocking the MK-484 TRF Radio on a Chip in a TO-92 package; see the parts page. We also offer a full kit based on the MK-484; see the Kits page and the anodized front panel picture below.
The March 2013 Newsletter shall be mailed the last day of February and will include the following articles: "Feedback FOR our Readers," by Dan, W7OIL; "Don't Throw those Old Rigs Away!" by Phil, WØXI; "The Thrift Shop Classic," and member correspondence. The Jan 2013 Newsletter mailed 12/29/12 and included the following articles: "A JFET Drain-Output AM Crystal Set, The Foxhole Radio, Crystal Set Strays Column and and a bunch of member correspondence. Welcome crystal set 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. For QRP Amateur Radio Enthusiasts: See our new CW REGEN FILTER Kit on the kits page. It does a good job of scrubbing band-limited noise remaining at the receive/rig headphone jack, thus reducing stress and improving CW copy. Volumes 18 & 19 of the Newletter are comb-bound. You'll find the combo volume listed in the Midnight Science Books page listed at far left. |
The basics of crystal sets and radio telescopes have much in common. Phil has written a series of beginner articles on radio astronomy, culminating in a presentation as Ozarkcon 2012 (4SQRP), April 14th, in Branson, MO. A compliation is now available; see our bookstore webpage. Click on the ultrasound kits page to see our new 12-inch diameter 8-inch focal length clear plastic parabolic dish and the upgraded and new RX3 Receiver, designed for finding power line RF interference and listening to bats and other bio-sources in the 35-45 kHz ultrasound band! ! Click on the kits page for more detail on our three newest xtal kits: JFET Detector Kit, JFET AM Crystal Radio Kit, and AM Band Antenna Tuner kit. Additional detail can be found in the May, July and September newsletters.
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