• Skip to main content
  • Skip to primary sidebar

Making Easy Circuits

Learn and build electronic circuits

You are here: Home / New Circuits / RF Field Strength Meter Circuit

RF Field Strength Meter Circuit

Last Updated on May 17, 2020 by Admin Leave a Comment

The circuit can be used to measure the strength of a radio frequency ( RF) emitted from a transmitter.

This is an exceptionally simple RF Field Strength Meter circuit.

The main stage acts as a crystal recipient. Utilize a germanium locator diode (like 1N34, yet AA119 is substantially more normal in Europe), a silicon one won't do.

How the Circuit Works

The frequency is controlled by L and C. For the FM band and VHF, wind a loop 5mm in distance across, 6-8 turns of covered wire 1mm thick.

You can simply shift the recurrence by spacing the turns a touch looser or more tightly.

C is considerably less basic. Something around 100p is best, however.

The second stage is based around the flexible 2N3819 JFET high-impedance intensifier.

With the 470k potentiometer you can change affectability of the circuit. The trimmer is utilized to zero the meter.

Utilize any old 50mA or somewhat littler ammeter from the garbage box.

circuit1

Problems:- You can't expect extraordinary execution from such a basic RF Field Strength Meter.

Affectability is sufficiently satisfactory to get a fundamental thought of the power that your transmitter is prepared to do.

Conceivable uses:- Use the field strength meter to discover when a transmitter is working at ideal power.

It can be exceptionally helpful when adjusting stages (like if there should arise an occurrence of the 4W transmitter) or exploring different avenues regarding diverse receiving wires.

You'll also like:

  • 1.  How to make a Simple Digital Clock Circuit Explained
  • 2.  How to make a Temperature Triggered DC Fan Speed Controller Circuit
  • 3.  How to Change Fluorescent Tubes to LEDs
  • 4.  Easy 1.5V to 12V/24V Converter Circuits
  • 5.  How to Make a Cellphone Jammer Circuit Explored
  • 6.  Best Refrigerator Thermostat Circuits

About Admin

Hey friends, Thanks a bunch for stopping by this site! I am an engineer with a Bachelor of Engineering in Electronics and Telecommunication. One of my passions is gathering information from all sorts of electronics books and tutorials. I then take that information and compile it into a language that is super easy to understand. My goal is to make those complex electronics circuit concepts and technical terms much more accessible for all the new and budding electronics engineers out there. I can also design customized circuit diagrams as required by the users.
If you have any questions related to this field, please do not hesitate to drop a comment! I am always here and ready to help you out with any queries you might have. I cannot wait to hear from you!

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Categories

  • 3 Phase (4)
  • 8051 Microcontroller (1)
  • Arduino (11)
  • Audio and Amplifier (102)
  • Automation (8)
  • Battery Chargers (64)
  • Bicycle Projects (4)
  • Car and Motorcycle Projects (39)
  • Datasheets (10)
  • DIY Projects (5)
  • Electrical (15)
  • Free Energy (6)
  • Games Projects (2)
  • High Voltage (14)
  • Hobby Projects (30)
  • Household Circuits (2)
  • IC 555 Circuits (5)
  • Ignition Circuits (2)
  • Indicators (50)
  • Infrared (6)
  • Inverter Circuits (29)
  • Lights and Lamps (97)
  • Medical (8)
  • Meter and Tester Circuits (38)
  • Motor Driver (17)
  • New Circuits (56)
  • Oscillators (30)
  • Pets and Pests (5)
  • Power supply (80)
  • Protection Circuits (25)
  • PWM (9)
  • Remote Control (20)
  • Security and Alarm Circuit (48)
  • Sensors and Detectors (66)
  • Signal Processor (23)
  • Solar Controller Circuits (62)
  • SSR (3)
  • Temperature Controller (20)
  • Timer (25)
  • Transformerless (7)
  • Transmitters (12)
  • Tutorials (45)
  • UPS (2)
  • Voltage Regulators (57)
  • Water Sensor and Controller (29)
  • Home
  • Privacy Policy
  • Contact
  • Disclaimer
  • Copyright

© 2025 · Making Easy Circuits