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• Webtubes AntiqueTubes - Collectible,antique, Radio Tubes, special purpose and audio electron tubes and literature.
  [ Hits: 5028 | Votes: 26 | Rating: 6.15 ]

• QRV.DK - Danish VHF radio web site with QRZ call search engine
  [ Hits: 711 | Votes: 2 | Rating: 9 ]
• Polish Callbook - Polish Callbook with search engine, QSL cards, photos and map generator.
  [ Hits: 955 | Votes: 11 | Rating: 5.45 ]

• RadioQTH - Ham radio vanity license search - RadioQTH Amateur Radio Vanity License Search: This site shows vanity call sign requests filed with the FCC, when call signs will be available for vanity applications and other useful tools that will help in the search for the perfect amateur radio vanity call sign.
  [ Hits: 3438 | Votes: 12 | Rating: 6.5 ]

• S9A Log Online - Search S9A Log Online DXPedition 2019 Jun 6 - 2019 Jun 18 - S9 Sao Tome & Principe
  [ Hits: 129 | Votes: 1 | Rating: 8 ]
• OH6YF Log Search - Logs of: OH6YF, OF6YF, OG6YF, OI6YF, OH6Y, OG6Y, OH0MYF, OH0MYF/6, M0BYF, M/OH6YF etc... Over 140000 contacts online!
  [ Hits: 921 | Votes: 2 | Rating: 2.5 ]

• The University of Calgary Radio Astronomy Laboratory - Radio astronomy research at the University of Calgary
  [ Hits: 823 | Votes: 0 | Rating: 0 ]

• National Radio Data - United States and Canadian call sign/scanner frequency databases, Worldwide airport frequencies, FIPS codes, Mass Media searches for DXing and more!
  [ Hits: 1772 | Votes: 7 | Rating: 7.29 ]

• hfradio.org Amateur Radio Resource Center - A comprehensive resource center with DX aids, live propagation, callsign searches, news and bulletins, maps, and more by NW7US
  [ Hits: 1601 | Votes: 58 | Rating: 7.82 ]

• Balun Designs LLC - Balun Designs wind high quality baluns and ununs for Amateur Radio and commercial applications based on the researched and tested designs of Dr. Jerry Sevick, W2FMI.
  [ Hits: 1892 | Votes: 2 | Rating: 8 ]

• National Radio Astronomy Observatory - Research facility of National Science Foundation, operates many radio telescope observatories.
  [ Hits: 543 | Votes: 0 | Rating: 0 ]

• Amateur Radio Propagation Studies - Amateur radio propagation studies (science, research, engineering, operating) and the BeamFinder propagation analysis software
  [ Hits: 1457 | Votes: 11 | Rating: 8 ]

• SWL Call Search - Search-Find-View-Download SWL/Ham Call Signs world-wide. Create-Send-Receive eQSL cards on-line - free, including bureau. Much more, ALL especially for the discriminating SWL.
  [ Hits: 1265 | Votes: 2 | Rating: 8 ]
• Search SW Stations by Frequency - Search for station listings by HF Frequency. Results show who is scheduled when on the frequency in question.
  [ Hits: 9280 | Votes: 140 | Rating: 7.75 ]

• English SW Broadcasters - English language International Shortwave broadcasts listed by search time.
  [ Hits: 4915 | Votes: 14 | Rating: 5.14 ]

• CQ Callbook - Online Internet Callbook - The CQ Callbook makes it easy to find QSL information from web-accessible sources like address and manager databases and country-specific callbooks. The search procedure is quite easy: just enter Callsign and click on the Search buttons.
  [ Hits: 2340 | Votes: 31 | Rating: 6.1 ]

• MobileLog - PocketPC Logging - MobileLog is a logging package for the PocketPC. It features DXCC reports, searching, alerts, and inport/export.
  [ Hits: 2669 | Votes: 5 | Rating: 8.6 ]

• DX ToolBox - DX Toolbox searches the web for you, gathering information on solar and geomagnetic conditions that affect radio propagation. It's ideal for the ham radio operator, shortwave listener, or other radio enthusiast.
  [ Hits: 7151 | Votes: 6 | Rating: 7.83 ]

• Freq 51 - Program samples the input, performs an FFT, and graphs the output
  [ Hits: 10042 | Votes: 9 | Rating: 2.11 ]

• DigChip IC database - DigChip is a provider of integrated circuits documentation search engine, it's also distributor agent between buyers and distributors excess inventory stock.
  [ Hits: 1365 | Votes: 16 | Rating: 3.5 ]

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