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  #16  
Old 04-11-2017, 11:52 AM
N2IXK's Avatar
N2IXK N2IXK is offline
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Quote:
Originally Posted by MadMan View Post
This is interesting actually. We really need to have a comprehensive source of information for making/rebuilding tubes... Enough of the knowledge has been lost already, it wont be long before it's all gone forever.

Nickel for a cathode seems easy enough, but is it plated with barium or like just painted on?
Nickel used for cathodes needed to be ultra-pure, as even tiny amounts of certain impurities (particularly silicon) would greatly reduce tube life in some applications.

The amount of chemistry and materials science that went into tube manufacture is quite amazing. It was nearly as complex as semiconductor fabrication is today. Entire industries sprung up (and died) to service the electron tube business.

The closest thing I have seen to a comprehensive book on making tubes is the 1962 RCA manual "Electron Tube Design". Available here:

http://www.tubebooks.org/Books/Atwoo...e%20Design.pdf

Last edited by N2IXK; 02-27-2018 at 11:48 AM.
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  #17  
Old 02-25-2018, 07:57 PM
dtryon dtryon is offline
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Tube Building

Greetings,
As to the above post, is the rest of the RCA book "Electron Tube Design" available anywhere? I find the information from the link interesting but would love to see the rest. Can it be downloaded or purchased from anyone?

Thanks,
Dennis

Last edited by dtryon; 02-26-2018 at 01:35 PM.
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  #18  
Old 02-27-2018, 11:45 AM
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N2IXK N2IXK is offline
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Entire book available here:

http://www.tubebooks.org/Books/Atwoo...e%20Design.pdf

and here:

https://archive.org/details/RCA_1962...on_Tube_Design

Last edited by N2IXK; 02-27-2018 at 11:49 AM.
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