Clubs and Organizations:  

Northwest Vintage Radio Society (NWVRS)   
Antique Wireless Association (AWA) 
Antique Radio Classified (ARC)
Canadian Vintage Radio a great site with classified ads
Heartland Antique Radio Association Tulsa Oklahoma
Indiana Historical Radio Society
MAARC Mid Atlantic Antique Radio Club
Museum of Radio & Technology Huntington West Virginia
Nostalgia Air! Lots of valuable information including John F Rider "Perpetual Trouble Shooters Manuals" on line!
Puget Sound Antique Radio Association (PSARA)
Radiomuseum Lucerne, Switzerland, a very comprehensive international group

"Sharing the stories of Pacific Radio"

Vintage Radio & Television Museums, Information & Related Sites:

American Museum of Radio & Electricity  The finest Museum of it's type in the west!
Bellingham Vintage Radio Museum (new name for the above)
Color Television History and Development
Collectable Detective a site where you can find radio & other collectables
Crosley Radios Jim Watson's site dedicated to Crosley Radio
Dave's Television Collection Dave Bertinot's Television Collection
Digital Deli an unusual site, full of all kinds of nostalgia, much of it radio related
Early Television Foundation Steve McVoy's very informative site on vintage TV
Fairchild Hi-Fi Page, Jim Long's page dedicated to Fairchild's professional gear
Jims Radio's  the new world of entertainment.
John Jenkins Vintage Radio Collection a great collection of early wireless & radio
Heathkit Virtual Museum A commemorative tribute to the Heath Company
In Living Color Ed Reitan's site devoted to the development of color television
Mechanical Television Museum James T. Hawes AA9DT
Museum of Radio & Technology Huntington West Virginia
MZTV TV Museum A wonderful site dedicated to the history of Television
Nostalgia Air Vintage Radio References, service data & more
Phil's Old Radios Online radio/tv museum since 1995, many restoration articles and other information for radio collectors
Phil's Place Phil Levelle's antique radios  and other interesting projects
Philco Predicta Restoration   Nap Pepin's nice page on the restoration of his Predicta
Philco Predicta page of MZTV
Radio Arts directory of radio related websites and discussion groups
Radio City a great radio museum & vintage radio site by Allen Kevin Gretsch
Radio Addict's Anonymous - a "must see" site
Radiophile.com - a great site where galleries of nice radios and more can be viewed
Radiomuseum based in Switzerland, the largest vintage radio site I know of
Radiomuseum-Radiowelt of Innsbruck Austria
Radio Museum Rottenburg GERMANY
Radio Salon.com a neat museum of radios & phono's
RCA Theremin Dave's Theremin Home Page
Sparton Equasonne  Mike Brown's Equasonne site
Southern Appalachian Radio Museum  Asheville, NC
The Sparks Telegraph Key Review  all you ever want to know about telegraph keys and related
Theremin   web site   An RCA Victor Theremin Registry
Tuning Eye Tubes in 1930's Radio Sets all you ever want to know about these tubes
Télévisions anciennes  the personal TV collection of: Luc Sirois (Lots of Predictas)
Television History - The First 75 Years Tom Genova's site
Vintage TV's - Eric's Vintage TV's http://www.collectorkevin.com/vintagetvs.htm
Vintage TV's - Collector Kevin's fine collection
Vintage TV's - Chucks Vintage TV's
Vintage TV Museum - Larry Auman
Vintage TV Museum - Steve McVoy
Vintage Microphones - Ekkehart Willm's Site
Vintage Microphones - James Steele's informational site
Vacuum tube information Bill Condon's informative site on early tubes. Great photo's!
Vintage TV and Radio - Chuck Pharis
Western Historic Radio Museum

Antiques Boedo Radios - an interesting site from Argentina
Antique Radios - the Collection of Allen Cutts
Antique Radios on line  - Alan Voorhees
Antique Radio Page
Antique Radios -  Bill Kendrick's Silver, Sounds & Stuff
Antique Radio Restoration - Bob Eslinger KR1U
Artifax Books this site offers interesting early telegraph & related books, vacuum tubes & other early communications related items
Atwater Kent Radio home page
Brands AM Radios Old Radios and Schematic Service
Brazilian radios  - Interesting radios from south of the equator
Catalin Radio.com  Steve Turners great site, Catalin & other beautiful small radios
CHCR a very well organized and interesting site, the oldest association of French radio collectors
Deco Radios the collection of Steve T. Davis
Early Wireless.com Lorne Clark's vintage radio site from the U.K.
EuropRadio a new site in the Netherlands featuring European radios (of course)
the Farmers a great site for the vintage radio enthusiast
FM only   The collection and information site of Andrew R. Mitz
Jims Radio's  the new world of entertainment.
John Koster's Vintage Radio Web  a great site from Holland
Johns Vintage Radios - repair, sales & restoreation
Jukebox and Radio Heaven Ger Rosendahl's great site
Lost 60's, a neat site from Japan
Ma collection de radios Raoul Laflamme's radio page
MerkAntiguo Vintage radio & phonograph dealer in Spain
Mikes Equasonne World Dedicated to the Sparton Equasonne Radio
Michael Feldt's Vintage Radio site
OLD RADIO CRAZY - High-end vintage radio collection of the 1930 and 40s.  Vintage radios and original Zenith parts are offered for sale. 
Old Radio Zone
Phil's Old Radios Online radio/tv museum since 1995, many restoration articles and other information for radio collectors
Radio Addict's Anonymous - a "must see" site
Radio Attic
Radio Era Archives, Vintage Radios on CD-ROM
Radio Exchange everything to do with vintage radio and audio
RADIOLD a new and interesting site
Radiomuseum based in Switzerland, the largest vintage radio site I know of - 20,000 pages! A wealth of information
Radioscape, a Vintage Radio & Collectibles Marketplace
Radio Salon.com a must see site, very cool
Radios Antigua - home page of Bentez Carlos Argentinean Radio Collector
Ricks tube radios & more - home page of Rick Heafner, Woodland, WA
Scott's Crystal Radios  a great site with receiving sets, old headphones & more
SpartaSoftware - Old Time Radio Show Downloads, Vintage Radio, And Advertising Ad Images.
Speaker People, 1920's Classic Cones - Buford & Jane Chidester The Speaker People
Stone Vintage Radio lots of info, pictures and items for sale
Super Heterodyne Radio of the 1920's
Telegraph & Scientific Instruments Museum - Tom Perera
Tektron Attilio Caccamo's interesting site from Italy
Transistor Radios & more Eric Wrobbel's site dedicated to Transistor radios
The Speaker Shop Vintage and Antique Speaker Repair and Restoration Services.
Victor Talking Machine Company & RCA Related Web Sites Victor Amateur Radio Association, Camden NJ   W2VR
Vintage Radio Directory - A network of Internet radio directory using our resource.
Zenith Transoceanic website Specializing in R-520URR restoration

Other interesting sites:

American Juke Boxes replica Juke Boxes, Turntables & Old Time radios
CED Magic   all you wanted to know about "Needle Vision" (or the CED video player)
Old Radio Programs Radio Memories
Old Time Radio Show Catalog Old time radio shows on MP3 files
ORGANHOUSE The collection of John Ledwon; Hammond organs, vintage electric clocks and other cool stuff!
The Past is a Blast  Where you can reminisce about the "way it was".

Audio, Phonograph and Record related:

Hi-Fi Interconnects - AudioLineOut.com
Rose & Gracey's Vintage Phono's and Talking Machines