A two tone test generator is a very useful, simple circuit that you can build to test your circuits for distortion. What is it The principle is very simple, two crystal oscillators generate two signals that are close to each other. Both the oscillators are well isolated from each others output and then mixed together […]| VU2ESE
Specan – A reboot of the W7ZOI/K7TAU An easy to build spectrum analyzer for the homebrewers Show me what you got! For those who can’t wait to see the circuit diagram, here it is (the Arduino hookup is a little way down on the page): (A better, higher resolution diagram can be downloaded here: […]| VU2ESE