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Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

automatic antenna tuner

  1. MikeMl

    Circuit wanted: Antenna Current lead or lagging Antenna Voltage?

    I need a circuit which will produce a DC level proportional to the jX term at the feedpoint of an antenna. The frequency range is 1 to 20MHz. The circuit should work with RF levels from ~10W to 1000W. The antenna impedance range: 5<R<500, -500<jX<500 Ohms. I am building an Arduino-based...

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