National and International Organizations

• ARRL - American Radio Relay League
• Ten-Ten International Net
• FISTS
• AMSAT

Local and Arizona Organizations

• Radio Society of Tucson
• Pima County RACES (Radio Amateur Civil Emergency Service)
• Old Pueblo Radio Club
• ARRL Southwest Division

Vendors

• Yaesu
• Icom
• Kenwood
• AES Amateur Electronic Supply
• MFJ Enterprises
• HRO Ham Radio Outlet