Hey, so I think I might have found the source of the bumper sticker...Unrelated Background Story
I was actually trying to find the source of the circuit diagrams on the wand/N-Filter/trap pedal/containment unit, and I ended up doing one of my multi-hour deep dives into image searches and old eBay auctions.
You know the one, it's on everything:
Ended up finding this:
Pretty close, but I couldn't find the exact model. Seems to be from an old car turn signal flasher or some other similar circuit. There's probably already an old thread somewhere on GBFans where it was found, but I didn't really need it anyway so I gave up looking. But I came across this thread and decided to have a go at looking for the bottom part of the containment unit label.
I went down a rabbit hole, I was pretty convinced it might be a Varian Data Machines motor but that didn't really seem to pan out.Possible breakthrough
I found a Usenet thread
, a group of very polite people (remember those days?) discussing building a Tesla coil.
One of them posted this:
I was doing some browsing the other day at MECI surplus. I came across several sync motors and I am curious if these are the type that work properly in SRSG service without further modifications.
Here is the nameplate data:
Terminal Data Corporation
115 VAC 60 Hz
I seem to remember these as Teletype motors? It is about 1/15 - 1/20 hp size or so.
To which this reply was posted:
It appears you have found precisely the same motor that I used successfully for my SRSG.
Check the P/N on the label: 252193.
It has ball bearing construction and a strong spring behind the rear bearing to keep the armature loaded forward.
Same specifications, same part number! Jackpot?
But I won't know for sure until I see their logo. Does it fit? Is it the right shape?Terminal Data Corporation
A bit of digging and I came across this product listing:https://www.recycledgoods.com/terminal- ... e-vintage/
That looks like it could fit, right down to the position of the split (in the middle), and the wave shape.
Here it is compared with the two images posted previously in this thread:
Let's get a closer look at their logo. Unfortunately the company no longer exists, but there's some old magazine PDF scans which feature promotional materials.
Here's one advertisement for TDC Film Processors:
And another one with a tagline:
So, I feel pretty confident that this fits.Where to now?
I'd love to get a look at the motor itself so we can see exactly what text is written next to it, but I've been unable to make any progress there. There were photos posted in that Usenet thread which might have shown the motor, but they're long gone (and not available on the Internet Archive). I went to the PupMan website which hosted the forums, they have loads of photos of members Tesla coils, but unfortunately doesn't seem to include either Greg or Jon's builds. I tried looking them up to see if maybe they had personal homepages which featured their projects, still no luck.
I also went down the path of trying to find some more auction or photo listings of some of TDC's vintage equipment, but most of what I came across was for a different "TDC" (Three Dimension Company from Chicago). There's barely anything out there.
I did find a list of trademarks, some of these could be good search keywords for various products they've released over the years:https://uspto.report/TM/72414889
It's 11pm and I have to call it a day. But I'm keen to hear if anyone thinks I'm onto something here, or maybe if someone else can track down a photo of this elusive motor!