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Antennas : Helical

• The Gain of the Axial-Mode Helix Antenna - by Dr. D.T. Emerson, National Radio Astronomy Observatory (NRAO++). Antenna Compendium Volume 4, pp 64-68, 1995, published by the ARRL.
  [ Hits: 2501 | Votes: 5 | Rating: 3.2 ]

• 425 DX NEWS - DXNews text bullettin senr via email since 1995, with a lot of DX News, annouces, QSL managers , updates on DX pedition, cluster statistics and DX and contest calendars edited by an Italian Team of ham radio operators.
  [ Hits: 4141 | Votes: 43 | Rating: 7.99 ]

• INRAD International Radio - Supplier of custom designed, high performance quartz crystal filters for communications receivers and transceivers, for Yaesu Icom Kenwood and Collins radios
  [ Hits: 2151 | Votes: 5 | Rating: 8 ]

• Sunset sunrise moonset - Sunrise, Sunset, Moonrise, Moonset, and Twilight by The U.S. Naval Observatory
  [ Hits: 767 | Votes: 5 | Rating: 5 ]

• Introduction to Radio Astronomy - Starting point for some basic facts about radio astronomy, what radio astronomers do, how radio telescopes work, and the kinds of research done with radio telescopes.
  [ Hits: 3222 | Votes: 5 | Rating: 5 ]
• Jodrell Bank - Nuffield Radio Astronomy Laboratories (NRAL) - NRAL at Jodrell Bank are a part of the University of Manchester's Department of Physics and Astronomy. The Laboratories are home to the Lovell Telescope and the MERLIN & VLBI National Facility which is operated by the University on behalf of PPARC.
  [ Hits: 588 | Votes: 1 | Rating: 10 ]
• National Radio Astronomy Observatory - Research facility of National Science Foundation, operates many radio telescope observatories.
  [ Hits: 543 | Votes: 0 | Rating: 0 ]

• Writing reception reports - A guide on writing reports to broadcasting stations and obtaining QSL cards
  [ Hits: 1291 | Votes: 3 | Rating: 10 ]

• Radio Norway - Radio Norway International web site
  [ Hits: 2803 | Votes: 9 | Rating: 5.88 ]

• Scanrec Scanner Recorder - Scanner Recorder (Scanrec) is a free audio recorder that is primarily designed to record speech. It has a VOX control that allows the user to save disk space when no sound is present in the signal. Since FM communications has such an effective squelch, the recorder works best with FM. HF ham bands and World Band radio have such a poor signal to noise ratio that the VOX gate on Scanrec might not be very easy to set.
  [ Hits: 15542 | Votes: 53 | Rating: 6.82 ]

• TK545 - Open source software designed to control and program the Japan Radio Co. NRD-545 receiver.
  [ Hits: 1043 | Votes: 1 | Rating: 7 ]

• HamClock - Ham Radio Desk Clock - Keep track of much more than the time with this Wi-Fi enabled device. HamClock is a desk clock that could show accurate time, geography, time zone, solar activ- ity, sunrise and sunset times, Maiden- head locators, beam heading,
  [ Hits: 3290 | Votes: 11 | Rating: 6 ]