Thanks to a tip from
@davefoxx, I won a hard fought bidding battle to get 205 off the Evilbay. The seller said they didn't know if it ran. That should have been a red flag, but I really wanted a copy of the 205.
I saw a DC plug in one of the pictures, so I assumed there may be a decoder in there.
Well, when it arrived, I found that all of the handrails on the right side had been broken off and glued back with tube glue and broken again. This is a mess I'll have to clean up later.
I tried it on DC and nothing. Then I tried it on DCC with the cab number. It tried to move, but couldn't. Next, I took off the body to see what was going on.
Next surprise was that the body was glued on. Yes, I said glued on with more tube glue... a lot of it. I worked it off, we all know tube glue doesn't stick well to engineered plastic, like the deck. It came off, but it left a mess of the walkway - globs filling the pattern on the walk. May be able to get it out of all the details - we see.
I found a TCS T1 decoder - the 9 pin version with an 8 pin conversion cable, plugged into the Atlas board. All the wires were gathered under one side of the board and held in place by several wraps of oozing black electrical tape - thick enough that it was rubbing on the flywheel. There is a black mark around the flywheel, which leads me to believe it ran at least once after the installation. Removing all the tape, the loco ran. I found the wires from the trucks and the motor wrapped around the terminals on the board - no caps, no solder, just wrapped. The wire from one side of the front truck was not attached to the truck.
It seemed like the smartest thing was to just gut it and rewire. I happened to have a TCS A4X in my box that I decided to use. These are nice decoders. It just replaces the Atlas board and you're done.
This one was left from when I converted my whole fleet to ESU Lokpilots a couple of years ago. The A4X has decent motor control and is still a Railcom decoder, so it will stay for a while.
Rewiring - soldering this time and the chassis is pretty decent, like all recent Atlas locos.
Examining the body, I found why the body was glued down. the previous owner had broken the hold down tabs off the body. I have idea that they broken the handrails when they openned the loco for the first time.
I'm not sure what I'm going to do about the handrails - matching the color will be hard, even if I can find a new set. The chassis may have to be replaced because of the walkway, but at least it's black, so there will be some availability.
Not the perfect outcome, but at least I have the 205 running around on my layout. I'll address the remaining problems at some point in the future.
Don