I started the Quest for Inter-City train on August 21, 2012, roughly a year ago – and I’ve yet to start building. I have gathered a bunch of bricks, some new, some old, made a ton of research and a bunch of blog posts, but today is the time to stop stalling and start building.
Let’s start with something easy, but at the same time quite satisfying for someone who never as a kid had 12V LEGO Trains: the 7864 12 V Transformer and its super cool brick-built regulator. I mean, how cool was that – building the lever you operate the train with. (There was also a simpler plastic knob option, which I don’t have.)
Note: You can click the images for larger versions.
Here are my parts. All black parts are brand new, either from LEGO Shop Pick a Brick or from other new sets I’ve sourced, except for the old Technic Axle 2 (replaced by TLG a decade ago with the grooved cross axle, easier to pull out I guess). The small axle and the four light grey or old grey Technic pieces come from my childhood collection, rescued from the ruins of 8680 Arctic Rescue Base. The star of the show, the 12 V Transformer came via BrickLink.
Interesting detail: Just like clip plates, there actually exists more than one version of the Technic 24 tooth crown gear, one with short and another with long teeth. I found two such gears from my collection, both I believe with long teeth, even though Peeron suggests my sets should have had short teeth. Maybe there were variations.
Anyway, I went with the crown gear I’ve got. After wiping clean the transformer (some comments about that in a future post) and brick-pooling the four bits of vintage LEGO, it was time for action. Now, this is really a small build, just twenty something pieces (24), but attaching it to the giant (by today’s standards) transformer makes it a little special.
Once you make sure the regulator is in the center position when fitting it in place, it moves 90 degrees to both directions for driving and reversing. Operating the regulator takes some force, but the Technic gears do their magic and it works well. The regulator also centers nicely, there is a distinct nudge where the “stop” is. I found the setup a little fragile when moving the transformer around though, the gear might get loose, but otherwise it’s fine.
And a multimeter confirms – it works too!
P.S. Notice the vacant 2×4 studded area on the right side of the transformer. That’s where one or more of the 1980 LEGO Trains remote controls attach. Originally the 7864 12 V Transformer came with 2×4 old/light grey filler plates to be placed on there (or on the last remote control).
8 Responses to The Transformer
[…] conventional channels. After 33 years, that’s still 51%. Could be worse. By the way, of the 7864 12 V Transformer set, you can get 20 of the 29 pieces […]
[…] and Washing LEGO II) and I thought I’d again add a few notes to the discussion based on my recent experiences with a used 7864 12 V Transformer, which really is a new kind of LEGO cleaning heck on Earth. Three […]
[…] Cleaning LEGO can be perilous too. One recent case was the matte texture on the 7864 12 V Transformer, that I managed to scratch a little from excessive force of a wet cotton wool stick (this […]
[…] the 7740 Inter-City Passenger Train. I have also made a few BrickLink acquisitions, including the 12V transformer. My use of old childhood parts will be far more limited on this set than on the Lion Knights’ […]
[…] said, I’m not intending to build this project as a PF train. The intent is still to put that 12V Transformer into actual use. However, as I still lack the 12V motor and the actual black wheels for the train […]
[…] is a 12V light brick, the original setup, although connected straight to a 1980 LEGO Trains 12V Transformer (originally the power to the lights went through the train motor instead, which I don’t yet […]
[…] work for a 12V train, but would work with the Power Functions modification). I also have the 12V Transformer and a couple of pieces of the 12V track system (not pictured here). I am not building the full 7740 […]
[…] power inserts themselves were connected, through a wire attached to almost any one of them, to a 12V Transformer that was used to regulate the speed and direction (forwards, backwards) of the 12V trains. Now, […]