Sensitive field-strength meter


Posted on Oct 27, 2012

Increased sensitivity gives field strength reading from low power transmitters. Operating range 3-30 MHz


Sensitive field-strength meter
Click here to download the full size of the above Circuit.

To operate, adjust R for Vz to Yz scale reading. RFC = 2 mH choke, C = 1,000 pF, R = 50 K pot, M = 0 - 1 mA, D IN34 or 1N60 (Germanium), Q = NPN (RCASK3020, 2N3904 or equivalent).




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Active SubWoofer
The 555 Door Alarm
mini and simple power amplifier
16 G— 2 LCD Volt Meter & Ampere Meter With PIC Schematic Diagram
Build a Beeper visual indicator
filter preamp subwoofer circuit
general purpose alarm
Armstrong Oscillator using a crystal
Wideband Active Small Magnetic Loop Antenna
led bicycle lights
CoSaTrak drive satellite tracking circuit
MIDI circuits
Universal Four-Digit Keypad-Operated Switch - Construction Details
Timing SCR control motor reversing circuit



Top