Guys.. Bad thing about it is I have no use for the AF or the MARX stuff. And no idea if they run or not. I was told that they may be DC?? I guess I could use them as some sort of stand in on my layout. ??? Cool looking engines!
Jim
Hmmm, I only got my Marx a couple years ago from a guy who had already given it a tuneup. The Marx transformer is in the box too, and I don’t recall which it is, AC or DC, or both, but it hummed along nicely. The box os buried in a closet. Hopefully an expert will respond before I can dig it out.
No worries Mark. I've had that old thing since I was a kid : )
I used to put it on Lionel track and pull it with my DT&I switcher. Since both outside rails are ground it shouldn't have damaged it lol
Jim
This last bit in the statement isn't quite correct ,Jim. An ac motor is ok on dc 98% of the time. Safe to try 99.999% of the time because a motor sees the equivalent of a dc+ pulse when it sees an ac+ wave. It is the ac- wave that fries dc motors as the dc motor reverses direction when it sees the next wave which is ac-, doing that at 60 time a second burns it out.(the USA's 60hz)
When in doubt Jim, use DC.
So, a DC motor will most often fry on AC. Some may take a while, most fry near instantly to about a minute. Some may run if pushed to a running start, but they will Minsky fry in time, the "ground" wont save it. Our use of the term "ground" with our trains isn't even really correct; there is no true ground from track to transformer on O gauge AC. It is a "return", or leg, or a few other terms, but not a ground capable of protecting a DC motor from AC.
We abuse the term because it usually conveys a thought we need it to, but be wary of context when you see it.
Marx DC were battery operated in my experience.
Shine the wheels* and shoes a bit, give it a push to freshen the brush contact and some oil to sooth it, and I bet it runs as well as when you boxed it.
*There is likely a thin layer of corrosion on the wheels; they will brighten up and get better contact, but go light. They are softer than Lionel wheels, prone to cracking and disintegration too. I'd get some use out of it while that is possible before it enters a near Dorfan state of "shelf queen". New wheels are not made.
We use them today for cost savings, but DC motors were used early on in the 1900s because batteries and even DC power lines were common in the early days of electricity. If you were well off prewar, or later; rural, you may have had a battery bank and a wind or water generator, or had battery deliveries (along with your heating fuel, etc.) ( I have a photo somewhere of my Mom's Dad delivering about 8 batteries, two milk cans, 12 bags of flour and a bed of coal in HIS horse drawn delivery wagon at about 12yrs old. He may have been the original photo-bomber..? He would get himself into a background and contact the photographer later. If he liked the focus enough he would ask for copies, some blown up, then crop them...prints were cheaper than film+prints )