triodes

I'm doing some exercises in R.G.Kloeffler's book, Electron Tubes (1966). I just tried #16 of Ch.4, p.78, which reads: "Use Figs. 4-10 and 4-27a to construct the static load line. Locate the Q point and state the quiescent values of E_b and I_b. What is the value of E_c and i_c?" (Here, I write an underscore _ to indicate a subscript, so that e.g. E_b is E with b as a subscript.)

Fig.4-10 is a spec sheet for the 6AV6 twin-triode tube. Fig.4-26a is a circuit featuring a 6AV6 triode with grounded cathode, with plate pulled up to 300 V through a resistance of 100 Kohm and where the grid is connected to ground by a 2 volt battery putting the grid at -2 V. I had no trouble finding the load line, the Q point, E_b and I_b.

I wasn't able figure out E_c and i_c. Can someone explain how that is done?

Part of my problem is that I don't like reading the explanations in this book for some reason, even though I'm sometimes able to figure out how to extract enough information from them to do the problems. I also find the notation confusing. Also, there aren't enough answers at the back of the book, so in cases of doubt it is hard to check my work. Even when answers are given, they often involve reading between scale marks, which leads to subjective and widely divergent answers. I would be glad to know of a book on electron tubes which goes into more depth and which explains things more carefully and assumes more mathematical background, with more attention to consistent use of terminology and where the index is more useful for locating terms used in the book.

I picked this one up for 2 dollars about 25 years ago in a pile of publisher's overstocks at a Barnes and Noble. It is not without merit but I don't want it to be the only book I can refer to.

Horowitz and Hill, 2nd ed., apparently has nothing on electron tubes.

Ignorantly, Allan Adler snipped-for-privacy@zurich.ai.mit.edu

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metropolitan area. *

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I guess I know it, but one thing I find confusing is that sometimes upper case letters are used and sometimes lower case letters are used. My vague impression is that the latter are for ac circuits and the latter for dc, but I'm not sure about that.

Thanks, that's what I thought.

Regarding needed specs: I don't actually need specs right now, since I'm just working problems in Kloeffler's book for practice and to get acquainted with computations related to vacuum tube circuits. I'm not actually building or designing anything at the moment. I also have the RCA Receiving Tube Handbook RC-30 and an old ARRL Radio Amateur's Handbook (1978) for reference.

One of the problems I have with Kloeffler's book is that he will introduce a general concept in the context of a particular circuit that he uses to illustrate the concept, but then expects the reader to know how to adapt the concept to other circuits without having been given the general definition.

It's possible I'm misreading him: maybe when he derives formula in the context of one circuit, he intends for it to be treated as general.

So, when I say I need more books, it isn't books of specs I need, but books that explain the relevant theory better.

Ignorantly, Allan Adler snipped-for-privacy@zurich.ai.mit.edu

****************************************************************************

Disclaimer: I am a guest and *not* a member of the MIT Artificial *

Intelligence Lab. My actions and comments do not reflect *

in any way on MIT. Moreover, I am nowhere near the Boston *

metropolitan area. *

****************************************************************************