Philips was a major tube maker but Philips also bought (the relevant part of) Sylvania and called it Philips ECG.

Ten years? It's been fecking 20 years. God, I'm old. :slight_smile:

Dixie Chicks: You Were Mine What's ten years? Still an awesome song.

Yeah, that is a good question.

Still lurking in the shadows. Multiple iterations behind in several ways... Hei, I'm slow! Hope you and the fish are good, buddy.

Best wishes with the problems there, sir!

Yep. The shape and construction are quite unique. [Just a note that there are quite nice looking Chinese replicas of these: https://www.tubesandmore.com/products/kt66-valve-art.]

Or you could say that the Miniwatt-labeled ones are, in fact, GEC tubes.

Russian.

AUD 43.37 in 2018 money according to https://www.rba.gov.au/calculator/annualPreDecimal.html.

No difference. Mullard made those tubes. Philips owned Mullard. Philips ECG = Sylvania. Philips bought (the relevant part of) Sylvania and called it Philips ECG. Buyers must educate themselves.

You could try calling it EL33 or EL3NG or 6M6G. :relaxed: https://www.radiomuseum.org/tubes/tube_el33.html

On the WIRAG, it is the letter A that makes them WIRAG. The MS is the type code (EL3N) here. The Mullard has an older type of Mullard code. I cannot explain the MS-. This is still a Mullard only code.

See these for 1) my guess of the Mullard code, and 2) for the CV code: https://www.head-fi.org/threads/ecc33-ecc35-tube-addicts.558352/page-3#post-9020495 https://www.valvecollector.uk/cv-valves.htm

That's the UK Tungsram brand, a Philips/Mullard brand, which at this point had no connection with Tungsram in Hungary. I can't read the codes but those were made by somebody with Philips machines, possibly Mullard.

Nope. It was an ITT company like STC in UK and Standard Elektrik Lorenz in Germany.

Se[e]:

Yes, that's Kungliga Arméförvaltningen (~ Royal Army [Materiel & Supply] Administration), one of the predecessors of current Försvarets materielverk (FMV, Defence Materiel Administration).

Well, I have my guess. :relaxed: I guess that Sweden probably was able to buy them during the war because they had things to trade and they traded with whomever they could. See: https://en.m.wikipedia.org/wiki/Swedish_iron-ore_mining_during_World_War_II

I've been wondering myself but have no theory yet. I'll let you know if that changes.

Yep, it's nonsense. Otherwise your external hard drive (etc.) wouldn't work. But not all rippers are created equal, especially with CDs in bad condition. Don't know about Windows Media.

I'm in the bit-perfect is bit-perfect camp. More bit-perfect does not compute.

No, I don't think that they are Eindhoven tubes. Those are earlier Mullard-only codes. Don't read them as Philips codes like that. The 3A1 may be a 1953 tube and the 2F1 may be a 1952 tube but I'm not sure about that.

I agree that they probably are French. Surely the Darios must be 1956 tubes with a YY.WW date. The other numbers are less clear…

CJ, where do you think those Philips tubes were made? Do they have codes that we can interpret?