Antique Radio Classified - A magazine with much much more than classified ads

Antique Radio Schematics - Comprehensive

Blonder Tongue Labs - The best durn Electronics Company in the world!

Crystal Radio Resources by Owen Pool - A great site!

Crystal receivers, by Dick Kleijer -  An excellent Site for most all aspects of crystal set design, theory and practice

Dave's Homemade Radios Page - Excellent place for radios, parts, resources and descriptions of more homemade radios than I have ever seen before

ePanorama - Almost all about electronics - Covers a wide range of topics

Gollum's Crystal Receiver World - A comprehensive Site for crystal set and radio related info of all types. First private WWW Crystal receiver home page; established in 09/28/1996

Headwize - Almost all you ever wanted to know about headphones

Jim's Crystal Radio Page - A great site showing interesting inovations as well as applications of the use of ferrite core inductors. Crystal radios and parts are also for sale

John Jenkins Vintage Radio Collection - This is a 'must see'

New Jersey Antique Radio Club - Lots of good stuff - Check it out

Our House News - Homebrew headphones and other good info

Peeble's Originals - A great source for Crystal, Tube and Transistor Radio Kits, Parts, Plans, Vintage Publications, Books, Detailed Design Info and Ready-to-go Sets

Play Things of the Past - Old radio parts galore!

Scott's Crystal Radios - Excellent site - Includes vast headphone Museum

SkyWaves by Al Klase, N3FRQ - An authoritative site 

Sound Powered Phones for Crystal Sets, and much, much more - Astonishing amount of great info!

The Old Radio Builder - Excellent help on attaining that "vintage" look

The Radio Club of America - The World's First Radio Communications Society

The Xtal Set Society - The name says it all. Check out the discussion group "Rap 'n Tap"

Vintage Radio and Electronics - Excellent Site for all radio experimenters, much reference info

XtalSets.com - SIMPLE RADIOS, by Paul Shaffer

Yahoo! Groups: thecrystalsetradioclub. - The group is by invitation only - You may contact Ferrite61 at ferrite61@yahoo.com and ask for an invitation