EME139 2.4GHz Multiplier Kit
- EME139 Kit Description:
Updated! June 2022 - Download the Complete Kit Notes:
- EME139 Construction Notes:
- EME139 Performance Tests:
- Kit changes and Modifications:
- Buy a Replacement EME2256-LO Multiplier Kit:
The EME139 was originally known as the WA19, and the original PCB design was done by Dallas VK5WA to suit a 2.4GHz Phase 3D receive converter Kit. The EME139 Board can be used for various applications from around 2200 up to 2500MHz. The board can easily be cut by 2mm along either side with a bench grinder to raise the filters frequency to 2400MHz. All the test results below were very consistent between prototype boards with no tuning required to peak output power. Some improvements can probably be made around the ERA3 Multiplier stage to improve efficiency, and achieve more output power, but this may only get you a dB or two better output.
For a complete description of the Kit before it was discontinued please download the Complete EME139 KIT Notes
The Image shows a completed Kit with tinplate fitted around the board. This is required to ground the ends of the half wave striplines for the filter to work.
The Image shows how soldered the tinplate is around the PC board.
The Image shows how the +9vdc 7809T regulator and electrolytic capacitors are fitted to the tinplate.
The Image shows the two filter board ready to be soldered together. The blue wire is for connection of the +9vdc
Connecting the two multiplier boards together with PCB pins
The completed two section multiplier
