Coax Switch
Tohtsu Coxial relay with SO239
Used RG58 coax to assemble. OK up to 144mhz but above that its too lossy unless you use smaller coax with braid aswell instead of using the metal box as shield as i did. If I make another it will be with full coax inside
So239's drilled and in place
Very tight fit with this box!
Finished
Uses a small aluminium box, powered by 12v DC. On switches one way, off switches the other
Another option?
Here I've used a car central door locking actuator bought for about £6 off ebay, which simply physically pushes a standard CX201 coax switch lever. It is reversed using a DPDT relay module. All of this runs from a small Scratch program on a Rasberry Pi, but better still you could use an arduino.
Warning: I killed about 3 actuators during this project because i left voltage on the actuator after it had moved causing it to burn out. The program needs ensuring it removes power as soon as the actuator has switched position
And Another option?
Here I've used a radio controlled car servo and steering rod, which simply physically pushes a standard CX201 coax switch lever. It is controlled using an arduino, plus a 12v relay provides the closed (short circuit, closed contact) connection to trigger the arduino program o move the servo. The 12v relay is triggered from a wifi enabled 12v switch that can be selected from a web browser (remotely).