Mail Call! Railway Post Office, commonly abbreviated as RPO has rolled in!

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Lionel GW-180 180-Watt Transformer 6-37947​

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I did it again, I broke my self-imposed spending freeze for the same reasons. I didn’t have one of these, and the deal was just too good to pass up. I got mine on Amazon at more than 60% off the list price.
 
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Lionel GW-180 180-Watt Transformer 6-37947​

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I did it again, I broke my self-imposed spending freeze for the same reasons. I didn’t have one of these, and the deal was just too good to pass up. I got mine on Amazon at more than 60% off the list price.
Wow, I ran straight over to Amazon, but they are back up to $335. I need a second one.
 
Another addition to my transformer inventory. The grandaddy, the king of post-war transformers a fully refurbished Lionel Trainmaster ZW-275.
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It may not be as pretty on the outside as others I’ve seen, but inside, where it really matters, it looks brand new. To make it even better, I paid only $175 for it.

I can't wait for the Bidirectional TVS Diodes I ordered to get here so I can test it with a locomotive!
 


Why do you need a diode(s) to test it? Do you think it has power surges?
The diodes aren’t necessary for testing the ZW; they’re meant to protect the trains from accidental spikes generated by the layout. The ZW itself is fine, using diodes is just a precaution recommended for any Post-War transformer.

Like all Post-War transformers, the ZW is known for its slow reaction to accidental shorts. I’ll be using mine for Post-War and MPC trains, and the diodes are sufficient for that purpose. My ZW won’t be powering anything with a modern circuit board, as I have the modern Lionel ZW-L transformer for those.

For modern electronics, any Post-War transformer should have two upgrades: TVS diodes to clamp voltage spikes and a fast-acting external breaker, since the built-in breakers in Post-War transformers are too slow to safeguard modern circuit boards. Even early RailSounds circuit boards are vulnerable to damage from surges.
 
For the diodes, are they two zener diodes nose to nose (or back to back)? That’s what I do to provide over voltage protection on bicycle generator lighting.
A TVS diode like the 1.5KE36CA I am using is built for AC. Inside the package are two avalanche diodes connected in opposite directions. That’s why it clamps spikes on both the positive and negative swing of the ZW’s AC output. So, you don’t wire two Zener diodes; the bidirectional TVS already is the two‑diode arrangement in one part.
 
I picked up another transformer! This time, I took a gamble on an original ZW-250 from 1948–1949, thinking it would be a future project. For $54.15, it seemed worth the risk.

The seller hadn’t tested it, but mentioned it powered on. But he said the lights didn't work.

From the listing photos, I could tell the cloth-insulated cord had already been replaced. There was a partial sticker from a hobby shop on the back. Could this have been rebuilt?

It arrived yesterday afternoon and it looks to be in excellent working order!
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This is the photo from the listing. I won't take any photos until I clean it.

I checked the bulbs, both looked new and are good, but they were loose. Whoever replaced the bulbs likely reversed the lenses. I tightened the bulbs and put the lenses back as they should be. Then I bench-tested it with an oscilloscope using a Lionel illuminated station platform as the load. It’s as quiet as a church mouse, with a perfect sine wave and perfect output voltages. Next, I’ll take it apart to check out the inside, then run a train as the load.

On the bottom is a complete sticker from Haslet Train Stop, a long-standing and highly respected Lionel service center in New Jersey. I suspect this ZW has been completely rebuilt, and Haslet was known for the exceptional quality of their work.

Instead of a project I think I picked up a great bargain!
 
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I'm almost certain this is a fantasy scheme, but it looks nice
That is an understatement, that is a fantastic looking locomotive!
couldn't pass it up
No wonder.
when the layout gets built someday.
You’re not alone; we’ll both make it there eventually. For now, I’m enjoying piecing everything together, and it seems like you are too.

Congrats on such an amazing discovery.
 


I just picked up yet another transformer! 🤪

This time, it’s a fully refurbished Lionel 150-watt Type-VW Multi-Control Trainmaster Transformer from 1948–1949. It was replaced in 1950 by the Lionel 190-watt KW Transformer which was more powerful and cheaper to make. In 1950 the ZW was upgraded to 275-watts.

Even in 1950, American manufacturers were looking for ways to cut costs. I wouldn’t say they were making things better, even with the extra 40 or 25 watts, because the original VW and ZW (1948,1949) were built like tanks! That’s why I ended up buying one of each!

Like the ZW, the VW can run four separate trains on four variable voltage circuits, with whistle and directional control on two of them. It first appeared in the 1948 Lionel Electronic Set, and as far as I know, it was never sold separately; making it a rare find indeed. I only paid $114.11!
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Front (From Bing Photos)
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Back panel (From Bing Photos)

To my horror, when I brought the box in from the front porch, it had a gaping hole in the side - WTF! Upon opening it, I found the left-hand outer control handle snapped clean off, thanks to some careless USPS worker. :(

Thankfully, a quick bench test revealed no binding or out-of-round issues in the control shaft. The sine wave and output voltages were perfect under a load, and like the ZW-250, it runs as quiet as a church mouse. No internal damage was done. 😁 (built like a tank!) Now the search begins for an original left-hand outer control handle with red lettering. Luckily it is the same control handle used for early ZWs. Which are not too hard to find. They even have the same part number ZW-99.

After letting the seller know, he asked what it would take for me to keep it as is. Honestly, I wouldn’t part with this rare beauty. I requested $20 (I like to be fair) and suggested he avoid using USPS for such delicate antiques. He quickly agreed and sent me a refund of $21.04. I’m confident I can find a replacement for less than that. And it should be 5-miutes job to replace the handle.

Aside from the faded red lettering on the outer control handles, this VW is as cosmetically pristine as a 75+ year-old antique can be. Honestly, I had thought to replace both outer control handles anyway, and once that’s done, this classic VW will look and operate just like new!

With some modern circuit protection added, these old transformers can easily power any modern or old AC locomotive or accessory.

FYI: All prices include sales tax and shipping. I must pay them, so they should be included.
 
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That is an understatement, that is a fantastic looking locomotive!

No wonder.

You’re not alone; we’ll both make it there eventually. For now, I’m enjoying piecing everything together, and it seems like you are too.

Congrats on such an amazing discovery.

Thanks, I actually had to disassemble my old layout, salvage what I could, and take the rest to the dump about a year ago before moving across the country. Fortunately, the new house has a much larger space for the future layout (that was actually one of the criteria for what kind of house I was looking for), but it will be a while before that gets started. Thus far, the planning consists mostly of pencil sketches on scrap paper for potential layout plans.
 
I actually had to disassemble my old layout,
We have that in common as well. I had to disassemble my layout when we moved in 2017. I now have an attic with plenty of space to build another. One thing after another keeps getting in the way. Not the least of which has been health problems. I have finally found a rhythm and a pace I can maintain. God willing, I will have some trains running in the attic this year.

I found AnyRail to be an easy and fun track planning software. But if pencil sketches work for you that is great too! Planning is a fun part of this hobby.

Thanks for sharing your hobby with us!
 






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