Use this little device along with your beam or phased antenna to help locate a hidden transmitter within a few feet.
The device works by mixing a variable amplitude of 2 or 4MHz oscillator with the incoming antenna signal to generate a weaker signals at +/- 2 or 4MHz intervals from the original signal. A 2MHz offset option allows you to stay within the Amateur Radio Bands if used with a -2MHz offset from the original signal.
This is KC9ON design and all credits go to him. As an option, I made a 2 MHz version as noted above. Also, the 10K Pot was changed to an linear Type B Pot. 70 % of the dynamic range of output level settings occurs within the first 45 degrees of potentiometer knob rotation from the lowest output level setting.
Assembled Kit - ready to go. Just add your antenna wires and battery.
Kit: Requires soldering. You may need additional tools to complete this project.
Battery, antenna, cables etc. is not included!