This project has 3 features.
1. It`s a Field Strength Meter,
2. A Frequency Meter and,
3. An aid for testing detuned transmitters.
Its uses will become clear in a moment but firstly let`s go over the background of a Field Strength Meter.
A Field Strength Meter is essential when designing and building transmitters. It provides signal strength values and allows us to compare and estimate the efficiency of a transmitter and its expected range.
The circuit consists of a tuned front end, an RF amplifier, two further stages of amplification, a diode pump and a transistor staircase.
The circuit picks up RF energy on its 5cm antenna and passes it to a tuned circuit where all the frequencies, EXCEPT