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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. 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.
