LF Exciter using I2PHD/IK2CZL JASON

Posted on Feb 23, 2013

The unit described here is simple to build, and can be quite small. The picture below shows the prototype, in a box 175mm wide, 210mm deep and 55mm high. The single circuit board is 140 x 90mm, so there's plenty of room inside for another board (a local control and LCD display board is planned). The design includes a linear amplifier, sine wave output and 60dB attenuator.

LF Exciter using I2PHD/IK2CZL JASON
Click here to download the full size of the above Circuit.

The Exciter uses a Direct Digital Synthesizer, made using a high speed microcontroller, to accurately generate radio frequency sine waves from zero to about 400 kHz. All the work is done by the inexpensive microcontroller, so no expensive DDS chip is need

Leave Comment

characters left:

New Circuits



Popular Circuits

Crystal Radio with LM358N
Shortcircuit protected voltage regulator
AM Radio
Monostable oscillator
Adjustable Vfo Temperature Compensator Circuit
Led driver using LTM8042 ??Module Boost Driver
Crystal Radio Circuits
Programming PIC 16F84A
XTR112 114 bridge input current excitation circuit diagram
Remote schematic CSJ-T300B with CSJ-R02B composition