Thanks to all for making these valuable texts available. A search of Archive.org using “Cold Cathode Tubes” does turn up a number of interesting books, references and papers: https://archive.org/search.php?query=Cold%20cathode%20tubes&and%5B%5D=mediatype%3A%22texts%22
Shaun M. Sent from my iPad6 No Regret > On Jul 6, 2019, at 09:40, Dekatron42 <[email protected]> wrote: > > Yes, you can put them in the library section. I am not able to put anything > there myself since some time back and when discussing other things with > Grahame he offered to put them in his Dropbox and share them. > > Please remember what I wrote in the other thread on Trochotron books on > Archive.org (copied below), so with this book I don't have any rights to > upload it to Archive.org - just as with most of the books that I have scanned > over the years with one big exception on AVO Valve Testers where I have been > given the rights to scan and upload them to the internet as long as I keep > the text "Copyright Megger Limited" on all pages, I've scanned AVO manuals > before I was given that right and they don't contain the text but are still > copyright Megger Limited. > > "If you would like to add a book to the library, we encourage you to scan and > upload it if you believe you have the appropriate rights to do so." - The > rights part is the hard thing to crack, I've talked to several rights owners > but most have denied the right to upload scanned books to Archive.org. > > Now, these two on Trochotrons I've actually been granted the rights to > distribute as KTH, The Royal Institute of Technology, gave me explicit rights > to do so. > > In some cases I thought there were no rights holders left but it often turns > out that rights have either been sold to another company now holding the > rights, or just transferred without any payment to someone else. I got a lot > of help from some librarians all over the world to track down rights on some > old books and unfortunately most of them still have copyrights owned by > someone (some copyright owners got really nasty when I asked for the right to > upload their old books)." > > /Martin > >> On Saturday, 6 July 2019 16:07:28 UTC+2, Nick wrote: >> This is a brilliant effort. Can we put them in the library section here? >> >> Weston has been out of print for ages, but is a truly excellent reference... >> >> Nick >> >>> On Saturday, 6 July 2019 08:27:00 UTC+1, Sgitheach wrote: >>> Another book scanned by Martin Forsberg. All thanks to him! >>> >>> !!!THE BOOK!!! >>> >>> Download 28MB >>> >>> https://www.dropbox.com/s/ne5vvdqw1r0pu6m/Cold%20Cathode%20Glow%20Discharge%20Tubes%20G%20F%20Weston-OCR.pdf?dl=0 >>> >>> Grahame >>> >>> PREFACE >>> >>> Cold cathode glow discharge tubes are not new, they have evolved over the >>> years from the early neon glow lamp, alongside the thermionic valve, to find >>> application as indicators, voltage stabilisers, and as switches in >>> low-current >>> control circuits. Technical improvements and added sophistication of design >>> in modern tubes have widened their application, and even in the face of >>> competition from semiconductor devices, which have virtually superseded >>> the vacuum tube, the cold cathode tube offers a versatile and reliable >>> active >>> element useful for control and computing applications where the highest >>> speeds are not essential. >>> Most of the newer tubes have been designed to operate with transistor >>> circuits. In general they are cheaper than either semiconductor devices or >>> vacuum tubes, and in some applications they can perform functions which >>> would require complex circuitry were alternative devices to be used. They >>> have a long operational life with the added advantages of light output >>> (useful >>> for servicing purposes), and the ability to withstand severe overloads. For >>> read-out and display purposes no satisfactory semiconductor alternative as >>> yet exists. >>> However, although cold cathode tubes are simple in design and construction, >>> satisfactory use by the engineer requires a deeper knowledge of their >>> mechanism and behaviour than perhaps is required for thermionic vacuum >>> tubes or semiconductors. For example, far more attention has to be paid in >>> designing circuits to the tolerances and life stability of cold cathode >>> tubes >>> than for other devices. This is mainly due to the fact that for valves and >>> semiconductors, which have continuous and reversible control >>> characteristics, >>> the wide variations within the tube and circuit can be compensated for by >>> negative feedback, whereas for cold cathode tubes with discontinuous >>> characteristics no such compensation can be provided. Thus the engineer >>> must be familiar with the parameters and circuit techniques peculiar to this >>> class of device if full advantage is to be taken of its inherent >>> reliability and >>> economy. >>> A much wider use could be made of cold cathode tubes if the relevant >>> knowledge were more readily available. Unfortunately, whereas there are >>> numerous publications dealing with thermionic and semiconductor devices >>> and related circuit techniques, there is a dearth of information on cold >>> cathode tubes. ln fact the circuit engineer relies almost exclusively on the >>> manufacturer promoting the tubes for the necessary information to enable >>> him to employ successfully the tube in his equipment. On this point it is >>> noticeable the extent to which cold cathode tubes of all types are employed >>> in Europe, where the manufacturing companies are most active, compare d >>> with the United States where, apart from numerical indicators, they are >>> hardly ever used. >>> The main aim of this book, therefore, is to present comprehensive >>> information >>> for the electronic engineer on the underlying physics of the glow discharge, >>> on the design, construction, and performance of a wide range of >>> cold cathode tubes, and on the basic circuits and their applications. lt is >>> hoped that by so doing the engineer will be helped to a better understanding >>> of the devices and will be enabled to make more use of their potentialities. >>> The first five chapters of the book deal with that part of gas-discharge >>> physics which is pertinent to cold cathode glow discharge tubes. The subject >>> is dealt with in more detail than is strictly necessary for understanding >>> the >>> devices, but is aimed at bridging the gulf between the fundamental >>> gasdischarge >>> research being carried out in the universities and similar establishments, >>> and the more applied physics and empirical data used by the tube >>> designer. Chapter 1 deals with ionisation in the gas and secondary emission >>> mechanism at the cathode, represented by the Townsend first and second >>> coefficients respectively. The two processes together are responsible for >>> the >>> electron multiplication in the gas, which dictates the values of the >>> potential >>> required for initiating a glow discharge (breakdown potential) and the >>> potential at which it is self-sustained (maintaining potential). Detailed >>> and >>> up-to-date data on the Townsend coefficients are given for the inert gases >>> and cathode materials common to commercially available tubes. The effects >>> of electric field and gas pressure are discussed. In Chapter 2 a survey is >>> made >>> of the breakdown mechanism and characteristics of a glow discharge in the >>> light of Chapter 1 , together with published empirical results. The >>> self-sustained >>> discharge is similarly dealt with in Chapter 3. In these two chapters >>> emphasis is laid on low pressure discharges, i.e. pressures below >>> atmospheric, >>> and in the case of the self-sustained discharge the cathode-fall zone is >>> mainly >>> dealt with. Chapter 4 is devoted to cathodic sputtering, the removal of >>> cathode material by the impinging ions, since it plays an important rote in >>> the processing and performance of cold cathode tubes. Account is given of >>> the work at low pressures or in a vacuum and on the various theories, as >>> weil as information on sputtering in the glow discharge. In Chapter 5, the >>> temporal growth and decay of a glow dischargc is discussed. These time >>> effects are important when considering the specd at which cold cathode tubes >>> can be switched. >>> Although the gas discharge physics dealt with in these first chapters is >>> limited in scope, being only that part which is relevant to cold cathode >>> tubes, >>> nevertheless within this limitation the subject has been treated fairly >>> thoroughly >>> with full bibliography and including unpublishcd work from the >>> Author's laboratory. lt is thus hoped that it will prove a useful refercnce >>> source for the physicist or design cngineer engaged on the developmcnt and >>> manufacture of cold cathode tubes or similar devices, and be a complementary >>> book for the advanced student reading gas discharge physics. >>> In the four remaining chapters of the book a wide range of tube types is >>> described. Attention is drawn to the basis for their design in tcrms of the >>> parameters discussed in the earlier chapters, and details are given of >>> construction, >>> processing, and performance. In this the author has been fortunate >>> in being able to draw upon the experience and knowledge of the various >>> development and application laboratories of the Philips/Mullard >>> organisation, >>> and to present considerable previously unpublished information. Basic >>> circuits, most of which have been tested in the associated applications >>> laboratories are given and applications are described. The chapters are >>> classified according to tube types; Chapter 6 deals with stabilisers and >>> reference tubes, including corona tubes, Chapter 7 with switching diodes and >>> trigger tubes, Chapter 8 with stepping tubes, and Chapter 9 with display >>> tubes. Other tubes which might equally be classed as cold cathode glow >>> discharge tubes, such as Geiger counters, T.R. cells and spark gaps have >>> been omitted, as have cold cathode arc-discharge tubes, since they are of >>> different character requiring a rather different approach. >>> Although cross-reference between chapters occurs in some places, attempt >>> has been made to keep each chapter self-contained, so that the engineer >>> desiring information on a particular device can obtain a detailed account of >>> the tube and its circuit application without having to read earlier >>> chapters. >>> The author gratefully acknowledges the co-operation and encouragement >>> of his colleagues in the research and in the development laboratories. He is >>> particularly indebted to Dr. R. F. Hall who read the manuscript and made >>> many useful suggestions and corrected a number of errors. >>> >>> Mullard Research Laboratories, Redhill, Surrey G.F.W. >>> > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/34fb52d5-997e-4784-a614-f931e7c4bf9c%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. 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