Note: My list of amateur radio supplies can be found here (under "AMATEUR - Equipment Sales"). Test equipment sources are located here.

• Cana Kit Corporation
• Dan's Small Parts and Kits
• DZ Kit
• Elecraft
• Elektor
• Electronic Goldmine
• Elenco
• Far Circuits (printed circuit boards)
• Hobbytron
• PAiA
• Rainbow Kits
• Ramsey Electronics
• SparkFun Electronics
• Vectronics
• Velleman

• All Electronics
• BG Micro
• Circuit Specialists
• Clearwater Tech
• Dan's Small Parts and Kits
• Debco
• Digi-Key
• Electronic Goldmine
• Fair Radio (military surplus)
• Far Circuits (printed circuit boards)
• Farnell
• Hobbytron
• Hosfelt
• Jameco
• L.D. Allen (includes links to multiple suppliers)
• Mouser Electronics
• MPJA online
• Newark Electronics
• NTE Electronics
• Octopart (electronic part search engine)
• Parts Connexion
• RF Parts
• Saelig "unique electronics"
• SparkFun Electronics
• TTI, Inc.
• Tyco Electronics
• Velleman

• Play Things Of Past
• Fair Radio
• Radio Daze
• The Tube Center (tubes)

• 4QD Electronics Circuits
• Circuit Bee
• Discover Circuits
• ePanorama Circuit sites page (numerous links to additional sites)
• Radiolocman
• Reconn's World Forum
• Washington University Circuit Archive