Category Archives: About

About me: “Aclassifier”

I am “aclassifier”


Øyvind Teig (2017)

Øyvind Teig (2017)

Go to Standard disclaimer, valid for all notes – and other disclaimers.

My user name “aclassifier” (or “Aclassifier”) is a pun that originates from my experience with collecting and describing (“classifying”) my first-generation short-and-tall Mercedes-Benz A-Class scale models. The result of this attempt is still to be seen here. Then, A-Class’ifiers became aclassifier. I have used that name whenever there was a need for one. Nowhere has this information been classified!

My “classic” home page (since 2000) is at I certainly update it. But it’s here the action is.

My Privacy Policy is here. My NTNU page is here (Norwegian). My used-to-work page is here (Norwegian). More about me is here only. Mail me here.

From "Thomas builds" by Gunilla Wolde

«At first Thomas saws the boards. It is difficult to saw. But it works out in the end when one saws long enough» by Gunilla Wolde. From “Thomas builds” @ Aschehoug, 1974, translated from Swedish original “Totte bygger” @ Saga, 1970. (Press picture for higher resolution)

This blog is all about all my attempts with that broken saw (it’s always starting out as difficult, the saw is not cooperating!) and then how I, after having tried long enough show what I’ve come up with. I am not starting up as an expert on anything, so I try to also show the paths I walk.

I have some header images that are chosen randomly by WordPress. The oldest first:

 This header image is from the inside of Torre del’Orologio (Torre del Candeliere or Torre dell Orologio) in Massa Marittima in Italy. The picture is not edited in any way, but the clockwork is indeed inside a glass box. It is the basis for one of the stories in my short story book Og der sto, du (in Norwegian).

 This header is a close-up of a bouquet of flowers. Believe me, the gerbera flowers are orange, and the flower vase has the form of a cone all the way down. (The vase is by ceramist Asbjørn Pettersen. I bought it in Mandal, Norway).

 This header’s idea is to show the graduated scale of the world’s first “voltmeter”, as seen at the The Volta Temple in Como in Italy. It is a “straw condenser electrometer in square bottle” or electroscope (as earlier built by Cavallo and Bennet) – but this time with a graduated scale, so it’s the first electrometer (displayed as item “305” at the museum; it’s an original from Volta’s hands). The pendula (arrow) are two straws, as the title suggests.

 I found this mechanical counter at a second-hand shop here in Trondheim, shown here without its hood. On this odd architecture (for my purpose) of five non-connected three digit counters I had to press 1025 times to display those 8 digits. With a specialised arrangement with three counters and 2+2+4 digits I would have needed only 26 presses. But this arrangement of iron plus added colour would never feel days go by. No matter how much fancy iron we added.

My wife Mari and I went, as we often do, for a walk along the river running through Trondheim. This anchor ball got my attention, as river Nidelva tried at its best to carry it downstream.

I visited Verkehrsmuseum Dresden (Dresden Transport Museum) in August 2018 and discovered this electric motor of 2400 kW. The E50 42 loco from 1927 is no more, but this is claimed to be the world’s most powerful electric motor for locomotives. I used a long time to feel it, enjoy it, be overwhelmed by it. In some way it reminds me of what my father Hans-Jacob Teig did as his first job in 1935-1945: winding the stiff copper cables of hydro electric generators. He was proud of this work and had some tiny 6×6 cm pictures of it. I have it in my blood. This stuff moves me. See the full motor (without the frame and the wheels) – plus more here.

I discovered this double sided anchored chain, visible through the ice the day before, and the following day brought my camera. I probably would thought about using my mobile if I knew the motive would have been gone by the next day. But I reckoned even the transparent ice would survive. I couldn’t forget it since it was hard avoid thinking about the strong symbolic power of this motive. Press picture for the high resolution version (or should I say “normal resolution”. 960×250 for the headers is not very much..). It’s shot by Dokkhuset at Solsiden here in Trondheim on 16Dec2018. Aside: I wasn’t 100% satisfied with the Panasonic Lumix DMC-LX5 picture presented here. So I brought a newer DMC-LX100 the day after, and even shot in raw format. The picture was technically better, but something had happened with the ice and light. The ice was perhaps more melted and rounded on the edges of the broken-off pieces. And one could barely see the chain below the ice. So I really could not replace the technically best with the dramatically best.

These “decoder wires” (as intended to be used inside model trains) each consists of 26 copper strands of diameter ⌀ 0.05 mm. That yields π * (0,05 mm / 2)2 * 26 ≈ 0.05 mm2 area of copper to carry lots of electrons around. Each cable can then deliver about 0.5 Ampere without getting hot. The isolation is PVC, needed just like the myelin sheath covering our nerves. Fully assembled each cable has ⌀ 0.6 mm. The picture is taken in 2019, when I discovered these wires. However, the rather complex technology behind a cable like this is quite old – even if my father and colleagues used cotton and oil around the much thicker wires when they made power generators at NEBB in Oslo in the late 1930’ies. Lately I have had to dissect multi-wired cables to find wires half as nice as those pictured. I bought some cardboard (more or less suited), and made the pictured future proofed multi-reel unit.

These quays were said by the locals to sit on the top of the crane for an hour or two in the evening. Then they took to the wings and disappeared. I put my camera on a tripod and shot some pictures. My Lumix DMC-TZ100 did f 5.9, t 1/320 s and 500 mm focal length 35 mm format, digital zoom not used. When I looked at the result I discovered the bird sitting on the lantern. Not on the top of the top, but almost. But from the ground, literally and on the other side, it’s here.

I added this picture as an afterthought to my note 211 when I discovered that one of the houses had an open door, leading to a staircase inside, up to a first floor. We literally were there. I just love these miniatures by Amsterdam Streets. There are doors on the corners, and in the fronts, with and without stairs, or even staircases. I don’t know what goes on inside these houses, but I can’t avoid looking at them as a set of something to explore. I hope that some of that exploration is reflected in these blog notes.


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I am also Aclassifier/aclassifier (and real name) on Facebook, Twitter, LinkedIn, Tumblr and Instagram, but that activity is zero to low. I am here. There also is a page, but it only points to here. I have Vipps and I am also Aclassifier on Wikipedia.

The Internet Archive / Wayback Machine copy of is here – and the older is here (from about Feb. 2002). Nice visualisation tools of the site map structure are also present there.

My real first name is of course Øyvind. Read about it here (Norwegian).

Standard disclaimer: Valid for all blog notes. I have no affiliation with any of the companies or persons I mention in my notes. I have no ads, there’s no money involved, no gifts are accepted. No donations, no affiliate advertisements, no rewards and no supporter support! I write what I think is right, and I strive to do it carefully. It’s entirely a hobby with no income of any sort. Just fun and expenses. A site a year doesn’t cost much, and I get my pension independent of what I present on my web pages. I always ask for permission to publish material that is not my own, and always refer to the source. Some time I have also paid, if I think it necessary to keep my writing going. Repeating, I don’t have ads on my site. I don’t sell products/services on my site. I don’t promote a business on my site. If there are more don’ts, just add them!

Narrative style disclaimer: These notes are mostly of log-type, since I write as my investigations proceed, more like stream of consciousness texts. They are (I assume, rather confusingly) readable during that process. If that is “structure” then that’s what it is for me us. Exceptions would be if I have had to relate to some magazine editor with an article (newest 2020) or when a paper has had to go through peer reviewing (newest 2013). One more thing. In some notes I actually develop things (like here). You may suspect that I don’t follow the Waterfall Model, V-Model or use Agile (software) development, and that I use a kind of stream of ideas and write as I go. I couldn’t have expressed it better myself. Being mostly alone on these project with less feedback that I would wish for, I still hope that the results turn out to be rather homogeneous, readable and understandable. And possibly possible to repeat or become inspired by?

Work disclaimer: Those blog notes and home pages discussing (mostly computer) science- and technology related matter (at and below) do not reveal any product sensitive technical data or technology of my previous employer Autronica Fire and Security (AFS) (I retired in June 2017). In addition, none of what I write about has independent economic value (actual or potential) to AFS. Also, I was not writing on behalf of or at the request of AFS.

– Øyvind Teig, Trondheim, Norway (Content updated  20Sep2020 (Houses)). The domain name was new 3Mar2009