Need Lionel CW-80 production codes

On my layout I have one of the originals that is still working (probably a record). This has a 0605 date code. There used to be a lot of threads about the CW-80 on the old Forum. They seem to have pretty much dried up.

 

There have been a variety of problems through the years. These include one version that had the power cord incorrectly terminated internally, cooling fan failures, and blown internal fuses. There is a special bit that's needed to open up the case. You can find these with a Google search.

 

The latest generation have a "G" prefix on the date code. Haven't heard anything bad about them.  Apparently the early versions had A-B common, while ones with the "G" prefix have U-U common.

 

I'd still limit the CW-80 to Lionel locomotives only. Do not use it for your MTH PS-1 or 2 locomotives. I'm using mine to power building lights and externally power Fastrack switches.

 

Gilly

OK, While we're on the subject of these CW-80 transformers, I have a question about mine. I recently pulled mine out and was going to put an on/off switch into it. While I was testing the variable (track) output voltage, I noticed that the max was only 18.9 volts which ain't bad, but in the handle down into the off or stop position, it was still cranking out 7.9 volts. Hmmm, to me, this isn't what I'd call, off.

 

I was going to give it to my son to power up some lighted HO scale buildings, but not with these voltage swings. Anybody else out there have this problem? And, should I follow the fellow forumite's advice and just give it to the recyclers. Just wondering.

I already posted a reply to the original question over on the Electrical Forum. Bill, That problem of voltage not being at zero when the throttle is at zero is pretty common. But I gotta ask, what type of meter were you using to measure the voltage? Mine tops out at 16 volts but the CW80 puts out a funky AC wave form. So it's tough to be certain if your meter readings are correct. Usually the zero voltage problem can be fixed by adding a resistive load across the track outputs. For me, a 24 volt lightbulb did the trick. Seriously, find a good use for it on the layout or at least send it to me before throwing it in the trash.

What I forgot to say was that in order to get an accurate meter reading on a CW80 you have put the transformer under a load. Try using the CW80 to actually run a train and then test the outputs.