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Recent content by tomasz1000

  1. T

    Transition Frequency of ECC83 triodes - does anyone have Experimental results?

    If you do, please tell me what fT you measured vs what anode voltage.
  2. T

    Radiation resistance of a short dipole antenna - do you have experimental results?

    If you compensate the capacitive reactance, then the structure must be in resonance - - - Updated - - - How can Z0 be known to 8 significant decimal digits? I find it quite suspicious.
  3. T

    Resonant transformer - sign of the voltage reinduced in the secondary winding

    I think the current reinduced in the primary will actually decrease, but the effective inductance of the primary will be different from its self-inductance.
  4. T

    Radiation resistance of a short dipole antenna - do you have experimental results?

    Why don't you compensate the capacitive reactance? Thanks for the data.
  5. T

    Radiation resistance of a short dipole antenna - do you have experimental results?

    Is there anyone who has MEASURED Rrad of a short dipole? In particular I am interested in the case of length between 0.1 and 0.2 λ.
  6. T

    Radiation resistance of a short dipole antenna - do you have experimental results?

    Has anyone verified formulas for radiation resistance of a short dipole? I have seen two formulas - according to one Rrad=800*(l^2/lambda^2) Ohms, according to the second Rrad=200*(l^2/lambda^2) Ohms. Which is approximately correct, if any of these?
  7. T

    Resonant transformer - sign of the voltage reinduced in the secondary winding

    Resonant transformer - sign of the voltage reinduced in the primary winding Consider a biresonant transformer with a small coupling coefficient k << 1. Let the voltage applied to the primary LC circuit of a resonant transformer be U1(t) = U*sin(2*Pi*t), - then the current through the primary...
  8. T

    Do MOSFETs conduct in both directions?

    If the gate of an N-channel MOSFET is properly positive wrt the source, will the MOSFET conduct when the source is positive wrt the drain?
  9. T

    Monopole radiating in a waveguide - how much energy propagates along the waveguide?

    Let's say I want to transmit EM energy from the Tx monopole to an Rx monopole via waveguide. My question is about what can be expected in a realistic case - the Tx monopole radiates in various directions with respect to the axis of the waveguide. All these waves INTERFERE - sometimes...
  10. T

    Monopole radiating in a waveguide - how much energy propagates along the waveguide?

    When a monopole radiates in a waveguide, it sends energy not only along the waveguide. Can I count on about 25% of energy propagating along the waveguide?

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