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|    rec.audio.tubes    |    Tube-based amplifiers... that go to 11    |    52,877 messages    |
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|    Message 52,627 of 52,877    |
|    electronix4747@gmail.com to Kurt Steffensen    |
|    Re: 2E22 - "300B Pentode"    |
|    05 Sep 17 12:41:52    |
      On Friday, July 31, 1998 at 3:00:00 AM UTC-4, Kurt Steffensen wrote:       > Gent´s.       >2E22 is a DHT tube and has a maximum 40 watts (plate + screen) dissipation        > I think the mystery is solved.       >        > 2E22 IS a genuie PENTODE.!       >        > I am 100% posetive about that.       > I have carefully excamined the ones I have got.       >        > I also now understands why it is refered to as the 300B,       > pentode.       > The similarity is remarkable.       > This can´t hardly be any "accident".       >        > Even the grid, and the filament, are the same structure.       > The five weird WE300B, rings on the plate are even on       > the 2E22 plate!       > The electrode assembly in the 2E22, are however a higher       > quality,simply because it is a modern tube.       > (The 300B, being developed in 1928-33)       >        > 2E22 has smaller bottle than, the 300B.       > Also the plate are not as tall, as the 300B.       > But as the 2E22 is a 30Watt tube, it all makes sence.       >        > The NEOTRON,made in France, is certainly a pentode.       > (Nothing to form any beams are inside)       > The other US, TUNGSOL, I can´t prove. (The micas are not       > transparent)       > But it is unlikely to me that it should be a beam-pentode.       > The 2E24, and 2E26 are also reel pentodes...       >        > Now, there is the possibility, that the ones made in US are       > with beam-plates , and only the European ones are without...        >        > The arguments for this could be the fact that US-manufacterers        > did favour the beam-tubes, and that the EU-manufacterers mainly       > produced pentodes.       > But it is more likely, to me , that all the 2E22´s are simply       > pentodes.        >        > The nickname "300B pentode" has allways sounded wrong,       > in my ears.       > But now, after having both of them in front of me, at        > the same time, I find myself accepting the name.       >        > It is certainly a tube to go for.       > (I can´t wait to I have the time to design an amp. with it.)       >        > Halfin in Belgium, and James Whitehouse in Denmark are having        > a stock of them. (I do not know their exact prices)       > Michael Wiams at Halfin has told me that they sell a lot to       > the Japaneese !       > I am also pretty sure that Ned Carlsson, can manage to supply       > you with 2E22, if needed.(Am I right, Ned ?)       >        > Anyway, compared to the the KT66,KT77,KT88,6L6 , etc.        > - the 2E22 seems a better choice, and at a fraction       > of the price, charged for these beam´s.........       >        > - sincerely Kurt Steffensen              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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