1/16 Bucyrus-Monighan Walking Dragline

[9W Monighan]

Took some time today to crack open the 1:1 mater switches from the scrapped Marion.
Lots of #10 wire I had cut to get these things loose from the cab.



The switches don't use potentiometers like I thought. Looks like some sort of variable transformer that changes the voltage to the control room.


Control Room. Lots of interesting things in here.



Here is another switch I have that has a potentiometer on the bottom.



My Big question is; Does anybody know what value the pots on the Spektrum DX7 Transmitter are?
I don't want to disconnect them from the radio just yet.
The plan is to hack the radio's joysticks and rewire them to the correct potentiometers that will be installed on my master switches from the 1:1 machine.

Closeup showing inside radio and pot mounted on master switch.

[9W Monighan]

Well I took some time this weekend to strip old wiring from the 1:1 controls to start my modification.


These interesting transformer things are called "Inductors" I found this out from a dragline electrician. These take 110VAC in then put out a variable voltage up to around 30VAC. These are not going to work for the DX7 Transmitter.
Pretty cool to fool around with. I hooked one up and rotated the coil with my fingers and the magnetic field increased along with the voltage output the further I turned.





I decided to unhook one of the pots on the DX7 and reconnect the wires to a 5K pot that is mounted to the bottom of another controller I have.
Well it worked! I tried it on one of my RC trucks and my dragline switch work very well. I ordered some more 5K pots to mount to my controlls now and hope to get them to work on my dragline.