cw frequencies

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cw frequencies

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DX Resources : Nets

  • County Hunter Net Procedures - The main purpose of the county hunter's net is to facilitate the operations of those hams seeking to work all counties in the United State. It is also a useful place for CW emergency communications as there is almost always someone monitoring the frequencies.
    [ Hits: 1522 | Votes: 1 | Rating: 10 ]
Operating Modes : Morse code : Learning Morse Code
  • IV3YNB CW pages - Pages fully dedicated to beginners guides, includes an interesting sample of a CW QSO, and a list of frequencies to practise morse code, useful for beginners,
    [ Hits: 919 | Votes: 4 | Rating: 7.75 ]
  • Recognition of CW signs at different listening levels and frequencies - The recognition of telegraphy masked by noise at 40 and 80 signs/min telegraphy speed was studied in 10 normal-hearing subjects at different sound pressure levels (25-85 dB SPL in steps of 5 dB) as well as at different test frequencies (2000, 1000, 800, 630, 500 and 250 Hz). The ability to recognize the signs varied with varying SPL. Recognition for most of the subjects was best at an SPL close to 70 dB. All subjects improved their recognition as the frequency was lowered to 500 Hz, some even at 250 Hz. These facts should be taken into consideration when training telegraphy operators as well as in the construction of radio receivers to permit listening at low frequencies. Furthermore, the critical ratio was calculated at the different test frequencies.
    [ Hits: 81 | Votes: 1 | Rating: 7 ]
Radio Equipment : HF Transceivers : Icom IC-706
  • Icom 706MkIIG Frequency Calibration - Unlike older radios, the 706 uses only one crystal oscillator (called the Master Oscillator). All other frequencies in the radio (L.O., 3-4 I.F. stages, VFO, and CW-offset) are computer-derived from the Master Oscillator. This makes it relatively simple to frequency-align the radio, so that it agrees with the Frequency Display in all modes.
    [ Hits: 210 | Votes: 2 | Rating: 9 ]
Radio Scanning : Regional : USA
  • Greater Cleveland frquencies - The lists are the most comprehensive compilations of frequencies for the Greater Cleveland area
    [ Hits: 1304 | Votes: 8 | Rating: 6 ]
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 : Software Defined Radio
  • DSP-10 2-meter DSP transceiver - The DSP-10 is an amateur-radio, software-defined 2-meter transceiver that can be built at home. It operates not only on SSB, FM and CW, but also on four Weak-Signal modes. Features are tailored to operation on VHF, UHF and Microwave frequencies. By W7PUA
    [ Hits: 15565 | Votes: 39 | Rating: 8.03 ]
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