is a lionel 242 AC or DC
T-ManThe DC motors started to appear in the 70's. Later they adapted to AC with the electronic E units. Today a lot of engines use the DC motor.
Sounds Good! :thumbsup: :smilie_daumenpos:O OK Technical. A DC motor needs DC and an AC motor needs AC or DC. With an AC transformer you can convert to DC with a do hickey called a bridge rectifier. The DC transformer you do not need to convert but give up all hope of operating a post war whistle because it activates on DC. It will run constantly under DC power. Hows that!
Okay----I don't know the solution, but I have something for you to read. This is the manual for your tranny: http://www.lionel.com/media/servicedocuments/71-4198-251.pdf
On page 7, it talks about internal circuitry that varies the output all by itself as you start up or slow down. Hope it helps.
I think T-Man has it right when he refers to the "potential difference". It's been a long time since I cracked open my old EE books, but I suspect "adding a resistance" for a voltage drop is the correct rationale.That is only the potential difference not the real output. You need something running on the track to get the right reading. So by adding resistance the voltge will drop.
Re: Transformer voltage ...
I think T-Man has it right when he refers to the "potential difference". It's been a long time since I cracked open my old EE books, but I suspect "adding a resistance" for a voltage drop is the correct rationale.
I downloaded the CW-80 manual from Lionel today. Same link, Reckers ... thanks! (My ebay buy didn't come with a manual.)
From what the manual says, the CW-80 DOES have a user-defined variable voltage LIMIT on the accessory side. One has to go through a proceedure of holding down the DIRECTION / WHISTLE / BELL buttons at the same time, then moving the throttle to get the desired accessory output voltage, then releasing the buttons, etc. Sort of a "twister" back door programming procedure.
I don't have any accessories hooked up, so for me, it's a moot point.
Anyway, my CW-80 seems to drive the train OK. So, T-Man's "if it works, don't fix it" philosophy likely wins the day.
But, still ... I wish I had paid more attention back in my old EE classes...