L-meter

The usage of inductors in RF circuits is often intrinsic to its operation. Unfortunately, the measurement of small values of inductance is often difficult without specialized equipment. If, you have the ability to measure frequency, either directly with a frequency counter or indirect with an oscilloscope, this burden can easily be overcome.

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Walkie talkie (2) transmitter

Below you see the block diagram for the walkie talkie transmitter.

Transmitter block diagram

The carrier oscillator is crystal controlled to guarantee sufficient stability. It is much easier to create a frequency stable carrier by means of a crystal than with an ordinary LC oscillator. The latter would require carefull selection of components and […]