Anyone have any experience with the interesting Stabilovolt voltage reg tubes? I think they were not allowed to be exported to the USA (it's an excellent German product) which may explain why I very seldom hear about them. ?
I see them on ebay for not so much, and they certainly look very interesting for getting several voltages out of a single bulb. I think the most common had 70V outputs, and several in series, so 70, 140, 210, and 280V outputs.
They are relatively large, but the neon ? makes for cool display.
I see them on ebay for not so much, and they certainly look very interesting for getting several voltages out of a single bulb. I think the most common had 70V outputs, and several in series, so 70, 140, 210, and 280V outputs.
They are relatively large, but the neon ? makes for cool display.
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Interesting. Says supply must be 1.5 x stabilzed voltage. So if you hope to use the 420V, you need 630V . Seems a little impractical.
Yes, gas regulator tubes need higher voltage in order to ignite the arc. The current needs also to be limited, it is usually done via a resistor.
I once asked the same about spark gaps, and neons.
But that's a big neon!
Are neons noisy?
The flicker with AC (arc extinguishing around each zero crossing) and the large ignition vs holding voltage, would put me off trying them to for say...screen regulation.
But that's a big neon!
Are neons noisy?
The flicker with AC (arc extinguishing around each zero crossing) and the large ignition vs holding voltage, would put me off trying them to for say...screen regulation.
There was a thread on the power supply forum about low noise regulators and I believe it was the 85a2 tube that was mentioned. The noise figure was incredibly low for the given output voltage. My latest amp uses an 0a2 regulator for the screen grids and the voltage doesn't drift even out to three decimal points.
Means "Property of the RLM", where RLM stands for "Reichsluftfahrtministerium", the Ministry of Aviation in Nazi Germany. So yeah Görings property
Besides having an ignition voltage that is greater than the maintaining voltage, glow discharge tubes also have an ignition delay that depends on how much radioactive primer is used and/or on the amount of light shining on it. It can be many seconds for a tube without radioactive primer used in darkness.
So I build a peace-amp using a mix of 1940s US JAN, British, and German military tubes.
That's it. Btw, not any object can be accused of it's own of having been part of that Nazi evil, imho. It were those henchman who made them work in their cruel manner. For instance, would anyone of us refuse to use Telefunken LS 50 tubes (if one would get his hands on them...) 'cause they were implemented in the V1 flying »doodlebug« bombs?
Best regards!
Best regards!
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Hehe, you mean like this? Perhaps have the LS50 drive my Federal F-123-A, a 6G6G as input tube, and my Cossor or Mullard rectifier in the b+... Those are some of my WW2 era tubes.
Edit: Almost forgot, must have a Stabilovolt regulating in there as well.
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There's tubes with the Wehrmacht logo including the tiny swastika under the eagle. Id prefer to see those in a museum instead of a functional amp 🙂
Hello,
After WW2 the USA decided to '' hire '' Wernher von Braun who was a key figure in rocket science in Nazi-Germany. He made some serious contributions to those intercontinental ballistic missiles.
The USA kept VERY large stock of vacuum tubes whichs end up at auctions decades later where i would get them for 2$ a piece. At least they end up being used now.
I wouldnt mind tubes with a swastika. BUT i heard sometimes they were made by prisoners who would try to make them in such a way they would have a limited life time. Almost similar to your 1000$ plus smartphones, cheap labour, high price but limited lifetime.
Greetings, Eduard
After WW2 the USA decided to '' hire '' Wernher von Braun who was a key figure in rocket science in Nazi-Germany. He made some serious contributions to those intercontinental ballistic missiles.
The USA kept VERY large stock of vacuum tubes whichs end up at auctions decades later where i would get them for 2$ a piece. At least they end up being used now.
I wouldnt mind tubes with a swastika. BUT i heard sometimes they were made by prisoners who would try to make them in such a way they would have a limited life time. Almost similar to your 1000$ plus smartphones, cheap labour, high price but limited lifetime.
Greetings, Eduard
RE 604 with Wehrmacht and swastika signet were destroyed in numbers that would fill a whole Reichsbahngüterwagon. Today and on the evilbay, this would be worth some big $$$$$$$.
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The story goes that some people at Philips in Eindhoven deliberately put small amounts of chlorine in valves meant for the German army, not enough to cause immediate failure, but just enough to cause a short lifetime.
As an aside, a fence in the oval room of Teylers Museum in Haarlem is full of swastikas, but it was made long before Hitler was born, when swastikas were just a pretty pattern: Gebouw en geschiedenis — Teylers Museum
As an aside, a fence in the oval room of Teylers Museum in Haarlem is full of swastikas, but it was made long before Hitler was born, when swastikas were just a pretty pattern: Gebouw en geschiedenis — Teylers Museum