Simple till you have to do a engine reset.
I run my Protos all the time. No issues
"It is very simple."
It couldn't be simpler. Well, maybe 239 words simpler....;-)
Bob Nelson
It is very simple. After reading the directions it is the same as my diesels for freight yard sounds. If you have a bell button, run the engine in the direction you want it at the speed you want. Press and hold the bell button for 3 seconds. I always listen for the air release when holding the bell button. Once you ear the air release it is in passenger station sounds and release the bell button. press the bell button to stop the bell. Press the direction button to stop the engine in neutral and the passenger station sounds will play. Pressing the direction button should sequence through the different passenger station sounds. Usually the fouth time will start the engine( diesel is this way). The whistle will sound 2 times(maybe as I have one diesel that sounds bell only) and ring the bell and start in the same direction you were running before you stopped. If you were in reverse before you stopped it will start again in reverse. If you don't have a bell button. Place the engine in neutral and set throttle under 8 volts and press and hold the whistle button till you hear air release. Press direction button and the next time you go to neutral you will get the sounds. If you never hear the air release, you will have to do a factory reset as it probably got switched off.
No need to go unidirectional. Just put in a regular old e-unit. If there's not enough room to mount it vertically, use the horizontal version with the spring inside. Put it downstreem of the bridge rectifier. Connect the (blue and yellow) wires that would have been used for the brushes of a universal motor to the two DC-motor wires. Connect the (green) wire that would have been used for the field to the DC common.
This is where I was when I gutted my MTH locomotives and put in rectifiers and electromechanical e-units.
OK, my experience with MTH products doesn't go back that far but if it's just Proto Sounds and not PS 2 or 3 you may not have all the sound options available now anyway, just locomotive noises, bell and whistle.
Possibly someone else can advise you, but I'd hold off spending any more money until you find out for certain.
I it's a Proto-Sound 2 like mine it should work like this:
Initially, you have to push the bell and whistle buttons on your transformer in the following manner,,
"Bell, whistle, whistle" at approximately one-second intervals. I say "approximately" because it takes a little practice to get it right. This should start the sound and voice sequence. After that you push the direction button to stop the train, then any further sounds in the sequence are triggered by the whistle button.
The last sound sequence, on mine anyway, is "Conductor's givin' us the highball signal! Let's get down the line!" and then the train starts rolling again.
It goes without saying you need a modern transformer to make all this happen. An older transformer with only a whistle button or lever and no bell button isn't going to work. As I've been told MTH locomotives prefer MTH transformers that's what I use. I've used a Lionel CW-80 transformer to make it all happen but I've heard bad things about 'em concerning MTH products so I don't use 'em except with Lionel engines.
Here's a link to the owner's manual on the MTH website,
http://www.mthtrains.com/sites/default/files/download/instruction/30st13820i.pdf
Just click on the link and you can print out the whole thing.
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