At our Contest Station ED1R we have on each highband 3 Yagis available. In 2012 I built 4 high power Stackmatches in order to switch and combine them properly. Since I never liked the way of WX0B’s stackmatch controllers with the rotative knob, a microcontroller and button based solution was the answer. After a few contests the solution has proven it’s reliability and comfort.
My good friend Pablo, EA4TX suggested to reuse his ARS Interface box, instead of developing everything from scratch. A welcome offer! Pablo’s ARS box, which is a USB powered, enhanced replacement/addon control for any kind of rotator, brings everything I needed:
- Microcontroller with USB Interface
- 5 Relay based output ports
- Available Input for Pins
- LCD Display
- 4 Buttons
So all I had to do was “just” to write a new Software, adding two plugs and connecting my cables.
Here are the main features of the ED1R Stackmatch Controller:
- Names can be loaded for all antennas
PTT Sensitive to select different RX and TX antennas
- Control through buttons or USB messages
- Ready for 4O3A Triplexor
- Comfortable Configuration through Windows application
This little Windows program allows a comfortable configuration of the individual Stackmatches through the USB port.
Pablo, EA4TX has already developed an TCP/IP based client/server which allows us to control the Stackmatches from any operator position. This is another great advantage. In a competitive M/S or M/2 environment all three Stations need access to the Antennas.