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• BOTW UK Directory: Recreation: Amateur Radio 
• Recreation: Radio: Shortwave: DX Listening 
• Kids and Teens: Sports and Hobbies: Radio: Ham Radio 
• Science: Astronomy and Space: Amateur Astronomy: Radio Astronomy 
• Business: Business to Business: Communications and Networking: Telecommunications: Two-Way Radio 

• Antique Radio Classified  - Covers old radio, TV, telegraph, amateur/ham radio, high fidelity/hi-fi and audio.
• Hamchatforum  - Forum for discussion of ham radio and related topics.
• HamDepot  - A continually updated listing of US Amateur Radio Clubs.
• International Amateur Radio Union  - Group provides information on activities, awards, projects, contests, events calendar, and news releases.
• QSL.net  - Free email and hosting for amateur radio enthusiasts.
• Tucson Amateur Packet Radio  - Offering news and specials, software information, publications, membership details, and conference news.