time signal

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time signal

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Antennas : 160M
  • The 160M No Excuses Homebrew Vertical - This antenna is designed for stations having a difficult time putting a decent signal on 160M from small or CC&R d lots. It is a 24.5 ft. vertical antenna, made from three 10 ft. PVC sections bolted together, and half wavelength of antenna wire helically wound around the PVC sections.
    [ Hits: 404 | Votes: 0 | Rating: 0 ]
Propagation : Resources
  • VHF APRS Propagation Map - VHF – Based on realtime APRS reports. This map shows real-time radio propagation from stations operated near 144 MHz. It uses data gathered by Automatic Packet Reporting System-Internet Service (APRS-IS) from packet stations in the amateur radio service. The map shows activity from the past hour. Paths are smoothed to create a color-coded footprint indicating the distance VHF signals are likely to be traveling.
    [ Hits: 308 | Votes: 0 | Rating: 0 ]
Shortwave Radio : Broadcasters : Time Signal Radios
  • MSF radio time signal - The MSF radio signal is a dedicated standard-frequency and time broadcast that provides an accurate and reliable source of UK civil time. It is available 24 hours a day across the whole of the UK and beyond. The signal operates on a frequency of 60 kHz and carries a time and date code that can be received and decoded by a wide range of readily-available radio-controlled clocks.
    [ Hits: 49 | Votes: 1 | Rating: 10 ]
  • DCF77 - DCF77 is a time signal transmitter operated by the Physikalisch-Technische Bundesanstalt (PTB). It broadcasts on a frequency of 77.5 kHz and is widely used for time synchronization in Europe.
    [ Hits: 56 | Votes: 1 | Rating: 10 ]
  • JJY - JJY is a time signal transmitter operated by the National Institute of Information and Communications Technology (NICT) in Japan. It broadcasts on two frequencies, 40 kHz and 60 kHz, and is used for time synchronization in Japan.
    [ Hits: 31 | Votes: 0 | Rating: 0 ]
  • CHU - CHU is a time signal transmitter operated by the National Research Council in Canada. It broadcasts on various frequencies and is primarily used for time synchronization in North America.
    [ Hits: 42 | Votes: 0 | Rating: 0 ]
Software : Macintosh
  • JTDX - JTDX (JT Digital Modes for Linux, MacOS and Windows) is a free, open-source software for amateur radio operators for the reception and transmission of digital modes, including JT65, JT9, and FT8, among others. JTDX is designed to provide improved decoding of weak signals and better usability compared to other digital mode software like WSJT-X. It also has features like a real-time spectrum display, logging, and decoded message storage and retrieval. Download JTDX from the official site.
    [ Hits: 3265 | Votes: 6 | Rating: 8.17 ]
Technical Reference : AI Ham Radio
  • AI-Powered Radio Signal Cleanup: Battling QRM in Real Time - Amateur radio enthusiast Jean-Paul Suijs discusses combating manmade noise (QRM) in radio signals using AI. Detailing experiments with phase-shifting techniques and the self-learning nature of AI, he explores AI-based audio processing apps for real-time noise cancellation during radio contests, demonstrating results on both medium wave and shortwave bands.
    [ Hits: 67 | Votes: 0 | Rating: 0 ]
Technical Reference : Key Clicks
  • Preventing CW key clicks - Key clicks are generally undesired clicks or thumps generated by a CW transmitter as the key is put down or let up. How much does the rise time or bandwidth of a CW signal need to be limited to prevent other QSOs on adjacent frequencies from being annoyed by key clicks?
    [ Hits: 93 | Votes: 0 | Rating: 0 ]
Technical Reference : Transverters
  • 2m to 70cm Transverter Circuit - A 70cm / 432 MHz Transverter Project transverter circuit is an electronic device that converts a radio signal from the 2 meter to the 70 centimeter band and vice versa, allowing a single transmitter/receiver to be used for both bands. It consists of an IF stage, local oscillator, frequency multiplier, and amplifier. The circuit must be designed for minimal signal loss, noise and intermodulation distortion.
    [ Hits: 77 | Votes: 0 | Rating: 0 ]

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