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  1. J

    GP Antenna Help

    Hey Now, I have been experimenting with a 1/4 ground-plane w/ 4 drooping radials. After three attempts I am puzzled as how to achieve a reasonably flat VSWR across the frequencies I frequent (~ 11 - 10 meter). I'm trying to perfect it in anticipation of a skip-full dog day nights of summer. I...
  2. J

    Alinco Modification to TX 1.5 - 30 MHz

    Hey Now, I have converted an Alinco DX-77 by removing jumper 'D' and it now TX and RX from 1.5 MHz to 30 Mhz ( including the 11 meter band (CB). If I open the case and switch hard-wired PC board switch from 100 watt to 50 watt and then implement the low power feature provided on the console of...
  3. J

    Best length for Lowest SWR

    I am currently building a sloping 1/4 wave ground plane. I have a Cobra 148 modified to about 28 MHZ( operating range 10 to 11 meters). What frequency should I use per resonance, i.e. for what frequency should I cut the length of the radiator so as to maintain a acceptable SWR across the board...
  4. J

    Frequency for lowest SWR

    I am currently building a sloping 1/4 wave ground plane. I have a Cobra 148 modified to about 28 MHZ( operating range 10 to 11 meters). What frequency should I use per resonance, i.e. for what frequency should I cut the length of the radiator so as to maintain a acceptable SWR across the board...
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