Schematic for Z-750 or Z-1000

Hello Lad,

While you wait on the schematic, I'm curious about what you are trying to do.

Is the idea to "just" replace the voltage control pot in the Z-controller with one that mechanically adapts to your handle?  Or are you trying to study the circuit to determine which control/button wires can be extended to a custom panel that retains all control functions but with your handle? 

I assume you plan to modify an existing Z-controller vs. duplicating some subset of the circuit from the ground up(?). 

What my plan was to build a replica of the controller in a box and use the lever to control the speed.

I thought about just using a wirewound potentiometer, which would essentially give me the same as an older transformer. I also considered using a rotary switch with resistors which would give me steps, rather than continuous control, like the "real thing". I do have a 24V 4A transformer which could be used  in conjunction with a fast acting circuit breaker.

I have some push button switches similar to those used in real trolleys and subway cars which I had planned to use for Horn and Bell. If I had a reversing handle, I would use it for direction control.

Right now, I have the lever attached to a PWM DC supply I made with several 555 timers that I have used with HO trolleys. I realize that I could use DC to run at least some trolleys I own (Bowers in particular) and could rewire my MTH ones.

On the other hand it would be fun to rum my Yankees Subway with a control lever originally used on a New York Subway Car.

Lad

Why don't you just remove the necessary buttons and control from the  controller and mount them in your mock-up; then simply extend the wires and connections. If you want you could replace the supplied buttons with your own and the variable control (potentiometer) used for speed could be replaced by a series of resistors and connected to a selector switch to create a stepped control.

Al

Thanks, Gentlemen. I'll try your ideas.

Lad