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Test & Measurement

  • Using The NanoVNA
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  • Testing Filters Using An Analogue ‘Scope
    Whilst NanoVNAs are superb for testing and viewing the frequency response of a filter, you can do the same thing with an old analogue oscilloscope and function generator.
  • Diode Ring Double Balanced Mixer
    The diode ring double balanced mixer is a simple device which can be used in receivers and transmitters. In this article, we’ll be testing a homebuilt mixer for a 20m transmitter. The mixer consists of four Schottky diodes – I used BAT28 diodes – and two coils wound on toroids. The coils need to be … Read more