QRP Antenna Tuner


Posted on Jan 29, 2013

This circuit is for a QRP (low power) antenna tuner, a.k.a. a transmatch, for use in the short wave amateur radio bands from 3-30 Mhz. It allows a wide variety of antennas to be connected to a low power transmitter. When the circuit is properly tuned, the maximum transmitter power will be delivered to the antenna. It is used in conjunction with a standing wave ratio (SWR) meter. This is a fairly generic antenna tuner circuit.


QRP Antenna Tuner
Click here to download the full size of the above Circuit.

Build the tuner in an aluminum project box. Drill holes in the box to mount the various components. Leave plenty of room around the sides of the components to prevent RF arcing. Be sure to keep both sides of the variable inductor insulated from the box, y




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Complementary lighting control
40M-cw-transceiver
Electrification Circuit Unit
LED driver based on MP3302 LED driver IC. Working circuit diagram.Operates from a single Lithium ion battery
Condenser Mike Pre-Amplifier Circuit
90S2313 AVR Robot Board
Simply by remote control law circuit diagram



Top