Rf Field Strength Meter Circuit Diagram

How the circuit works.

Rf field strength meter circuit diagram. The amplification can be adjusted by p1 and with s1 switch we can select three frequency ranges. Here is the schematic diagram of this rf strength meter circuit. Here is the schematic diagram of this rf meter circuit. To use turn on transmitter and meter.

The main stage acts as a crystal recipient. This is an exceptionally simple rf field strength meter circuit. The circuit use only one transistor mpsa18 as the active component. Here is a very useful project schematic of a sensitive field strength meter circuit.

You re measuring field strength from a transmitting vhf antenna use a vhf an tenna on the field strength meter. The signal strength meter display uses analog meter 1 ma full scale. L1 480 khz to 2 4 mhz l2 2 4 mhz to 12 mhz l3 12 mhz to 40 mhz the antenna is made of 30 cm long metal rod. Considering these factors a dual mosfet is used as an rf amplifier in this circuit.

The rf field strength meter circuit schematic. This circuit is another radio frequency rf field strength meter similar with our previous field strength meter circuit but with lower supply voltage only a single cell 1 5v battery. Start your measurements by using low transmitter power and a near minimum sensitivity on the field strength meter. The frequency is controlled by l and c.

A field strength meter fsm is a very useful circuit to detect and measure the rf signals and their strength. Adjust c1 for peak reading. The variable resistor on the field strength meter figure 3 the case circuit board and antennas for the field.