TMCC or Conventional Smoke Volume Switch

Being I have the K-Line Allegheny that needs the smoke unit rebuilt, and I want to add cruse to it, could you perchance post a how to on how to do it?  It'd be a great way for me to get my feet wet in the servicing and upgrading of locomotives being able to add the chuffer and cruse and LED lights to this.  Then my K-Line Big Boy, then my MTH Camelback from PS-1 to TMCC, and so on...

Folks could always add an ACREG to give a smoke unit the L, M, H TMCC control.  

I am confused about the wiring though.  If 4 diodes are in series on the output of the R2LC doesn't that drop the useable voltage by 2-3 volts all the time?  Or do you mean you have dual path.  One output of r2lc to one post of switch and diode string to other outside post.  That is a simple solution, just need to make sure center tap of switch goes to smoke unit.  G

Well, the ACREG requires you to spend the $30 for the part, and to wire it into the locomotive.  You also have to change the smoke unit resistor to match the ACREG requirements.  Yes, that can be done, but it costs a bit more than the 50 cents I spent on the diodes, and my wiring was very simple and quick.

The smoke on/off switch is a SPDT switch, so I just used the off side with the series diodes as the "low" side.  I thought I described that pretty well in the first post.  I guess I forgot to say SPDT, I figured that was assumed.  Yes, the center tap goes to the smoke unit.

That is a very good, effective, and dependable way to do it. While I think it is most important just to be able to turn it on and off, adjust-ability is nice, too.

I thought about that Lee, and decided that if I wanted a manual on/off capability, I'd add a switch.  Of course, since I run 99.9% command, I have an on/off switch in my hand whenever I'm running the locomotive.

After my mods, the smoke unit was obscene, and I wanted to be able to "tone it down" at times.