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Recent content by BiggyD

  1. B

    Calculate output impedance of transmitter

    OK. So I can't get there from here. But can I at least assume the inductance from VCC to the output is about 64nH + 26.4nH = 90.4nH, (see below . I miscalculated previously)? At 433MHz that would be about 246ohm. Shouldn't that be close to the output impedance? The schematic I attached doesn't...
  2. B

    Calculate output impedance of transmitter

    I bought a 433MHz xmtr/rcvr and I'm trying to match an antenna to it. I know I could use a 1/4wave wire, but I have a Nano VNA and I'd like to try and tune the antenna. The manufacturer does not specify the output impedance, but if I sum the two inductors in the VCC path, as shown in the...

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