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Recent content by K7FE

  1. K7FE

    Set up cost for 25 mile over water Microwave link.

    During the early 70's I was consulting at Hughes to develop an AML transmitter/receiver system. It used 5 watts of amplitude modulation on 12.7GHz powered by a Varian Klystron. One of the applications was to connected TV between Hawaiian islands. It did that very well. The system could be...
  2. K7FE

    180 degree Hybrid Coupler for rfid application

    The wilkinson combiner/splitter is a zero deg 3 dB device and I am sure that is what "Higgler" meant.
  3. K7FE

    Basic Question

    The output of the antenna can NEVER exceed the power applied to it in a true 3D omni directional pattern. If you have a antenna that is rated for a million watts and you feed it with 200 mw, the power out of the antenna will be 200 mw, less losses in feed line and antenna efficiency. So as...
  4. K7FE

    Tips for grounding an antenna in thin soils (2' depth to rock)?

    UFER (cement encased) grounds can explode when hit with lightning. It is a bad engineering practice to use the rebar or a wire encased in the cement for a “lightning ground“. The moisture in the cement vaporizes instantly when superheated during a direct lightning strike causing the cement to...
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