NOS elektronka C3g Siemens , predojačevalna PTT pentoda

Tile 2 lepotički sem našel med TX lampami iz Kozare.

031337262 ( 100 eur je cena za kos )

HISTORY of C3m, C3g SERIES
C3m was developed in cooperation of the LORENZ company in Esslingen, Germany. Lorenz were the #1 producer of electronic systems which connects people with each other, making phone calls. Siemens was involved in that too. The Lorenz company later was named SEL Lorenz. They sold their telephone inter- connection systems worldwide, to the German Post, China, and many other countries. I visited that site, when I was a sales engineer for Hewlett Packard in 1989. The engineers worked in wooden barracks on a campus in Esslingen. Terrible buildings. Already by then, there offices looked like time capsules to me, But, they were "the" company for those systems. Just to imagine the business potential, though all we had to offer were red and green 3mm LEDs, which they used on their printed circuit boards. Still, when you were in there with one LED, for some new printed circuit board, oh boy... you had a big fish. It was before my time, but just imagine what is was, to sell electron tubes to them, in the 1950s, when these where standard products! The Lorenz company was so huge, they could just say how the tubes had to be like. Later, as the French Alcatel merged, the French kept transferring all competence to France, until nothing was left, and the French lost their interest, and disposed of the remains. I believe the name rights ended up with Nokia. I suppose it didn't sound French enough to see any value in it. But... we have to say it, the Lorenz company was the designer of the C3m. The original purpose of this tube was described in an article in "Fernmeldetechnische Zeitschrift, July 1952" as a tube for audio and high frequency applications up to 500kHz. So this tube could be directly used to amplify audio signal, and also in carrier systems. (compare it with radio transmission, but via wire, so a modulated carrier signal). At that time the product was the V60 Telephone System by Lorenz.