[Amps] Tube Theory?

[Patrick Barthelow]

A single site mother lode of Tube information, many links:

http://www.tubebooks.org/tube_data.htm 

What it does not explain is how/why there are companies that are able to sell  200 watt TUBE audio amps  (using 3-400Z, looks like) for $18,000.  
Nor does it give out that company's customer list.  Somewhere there is a photo of a "monoblock"  tube amp with a large Transmitting tube in prominent position
for $18,000, two required for stereo.   If you want to satisfy real needs for QRO HF amps, you can fund your habit simply by building a "high end" 
audio tube amp or two, each year.



Best Regards,   
Pat Barthelow,  AA6EG   





> Date: Thu, 21 Jun 2012 08:54:53 +0100
> To: amps at contesting.com
> From: gm3sek at ifwtech.co.uk
> Subject: Re: [Amps] Tube Theory?
> 
> Jerry Kaidor wrote:
> >
> >   Anybody know a good book to get on tube theory?  I'd just like the 
> >basics on how to go from a set of specs and curves to a design.  I used 
> >to know this stuff but that was a LONG time ago.  We recently moved - 
> >and I can't find a lot of stuff.  Including my 70's college textbook on 
> >devices and circuits, which had a good treatment of it.  Load lines, 
> >plate resistance, quiescent points, interelectrode capacitance, etc 
> >etc. Can't find it anywhere.  I did locate my two copies of "The Art of 
> >Electronics", but they don't say word one about tubes.
> >
> >   I have several ARRL handbooks from the 50's to the latest one. Don't 
> >know if there's enough detail in those to actually design anything.
> >
> >   I see that "The Care and Feeding of Power Grid Tubes" is now 
> >available as a free download...
> >
> 
> By all means read Eimac's 'Care & Feeding' for the tube manufacturer's 
> viewpoint.
> 
> But by far the best books on the wider subject of transmitter design are 
> the ones written by the Collins engineers:
> 
> 'Single Sideband Principles and Circuits' by Pappenfus, Bruene and 
> Schoenike, 1st edition 1964.
> 
> 'Single Sideband Principles and Circuits' by Sabin and Schoenike, 2nd 
> edition 1976, ISBN 0-07-912038-5.
> 
> The two books are quite different, so be careful about the titles. Each 
> one deserves a ***** rating, but on its own different terms.
> 
> The 1st edition gives more detail about transmitting tubes and circuits, 
> and is an excellent snapshot of the state of the art as seen by Collins 
> in the early 1960s. The 2nd edition is completely revised, with many 
> more pages and a lot of new material, including chapters on solid-state 
> amplifiers; but it is written more at the block-diagram level and has 
> much less of a hands-on feel.
> 
> The answer, of course, is to buy them both (go on, you know you will :-) 
> Both books are out of print, but used copies are often available from 
> online booksellers.
> 
> 
> 
> -- 
> 
> 73 from Ian GM3SEK
> http://www.ifwtech.co.uk/g3sek
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