Simple Amplified Field Strength Meter Circuit


Posted on May 11, 2012

This circuit uses a FET as a dc amplifier in a bridge circuit. R4 is set for meter null with J1 short circuited. Any surplus 50-mA meter can serve in this circuit. RFC1 is any suitable RF choke for the band in use. A 2.5-mH RF choke will do for broadband operation. R1 is a sensitivity control.


Simple Amplified Field Strength Meter Circuit
Click here to download the full size of the above Circuit.

The antenna can be any small whip antenna (2 ft or less).




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Remote Solar LED light
2 Transistor FM Voice Transmitter
power supply alarm circuit
Radio Beacon Converter
Telephone Visual Ring Indicator
Light-Beam Alarm For Intrusion Detection Circuit
Arduino V-USB / HID 14 channel data logger
Make a singing MSP430 microcontroller
BJT H-bridge Implementation
Notch Filter
1W UHF Linear Amplifier with BLW33



Top