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G4BCH's latest activity

  • G
    G4BCH replied to the thread Lightning melts ground wires.
    Probably not. If it was a direct hit to the antenna the lightening would probably just jump from the radio to the nearest ground...
  • G
    G4BCH replied to the thread External vs Internal Clock.
    If you read section 5.3.6 and 5.3.7 it explains how to use external clock signals and the internal clock circuits. External clocks are...
  • G
    G4BCH replied to the thread Significance of negative dBi.
    Conservation of energy law applies, so yes you are right. If it is a real antenna and real world losses are included then the antenna...
  • G
    G4BCH replied to the thread MMZ09332B NXP power amplifier.
    S-parameters are measured with the device with a 50 ohm source and load. The data sheet gives the performance with matching circuits...
  • G
    G4BCH replied to the thread S Parameter.
    Type ATF53189 into your favourite search engine. Find a link to the pdf datasheet Download Worked for me.
  • G
    G4BCH replied to the thread Antenna measurement with spectrum analyzer.
    The terms SWR & VSWR are used interchangeably.
  • G
    G4BCH replied to the thread Antenna measurement with spectrum analyzer.
    For an antenna, yes very good, it is almost 30dB return loss, many 50ohm terminations are not as good.
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