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Calibration

The BFO and rig calibration can be tricky to get right. Here are some helpful tips:

  • Calibrate the BFO using some white noise reception and a computer + audio spectrum analyser. I used fldigi. The passband should be 300Hz -> 3KHz.
  • Then (re) calibrate the VFO @ 10MHz.
    • Note that the version 5 stock software goes into TX mode when the calibration is started.  You need to insure that there is a dummy load attached and not an antenna.  the signal transmitted will be 10 MHz, not legal, at least in the US.
    • For the other versions you need a known AM signal for best results.(example. WWV).  You will be zero beating against this station.