Rf Field Strength Meter Circuit Diagram

The signal strength meter display uses analog meter 1 ma full scale.

Rf field strength meter circuit diagram.

Adjust c1 for peak reading. To use turn on transmitter and meter. 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. This is an exceptionally simple rf field strength meter circuit.

How the circuit works. The rf field strength meter circuit schematic. Here is the schematic diagram of this rf meter circuit. 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.

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. This rf field strength meter has no absolute scale if we don t calibrate the scale using a standard instrument but the important thing for this. The circuit shown here can be used as a wide band field strength meter and can.

The circuit use only one transistor mpsa18 as the active component. Here is the schematic diagram of this rf strength meter circuit. Start your measurements by using low transmitter power and a near minimum sensitivity on the field strength meter. The variable resistor on the field strength meter figure 3 the case circuit board and antennas for the field.

Here is a very useful project schematic of a sensitive field strength meter circuit. Utilize a germanium locator diode like 1n34 yet aa119 is substantially more normal in europe a silicon one won t do. The amplification can be adjusted by p1 and with s1 switch we can select three frequency ranges.