MORGAN JONES BUILDING VALVE AMPLIFIERS PDF

It provides a detailed presentation of the rudiments of electronics and valve design for engineers and non-experts. The source also covers design principles and construction techniques to help end users build their own tool from scratch designs that work. The text starts with familiarization of the fundamentals of electronics, which are essential for designing and building valve amplifiers. Particular attention has been paid to providing solutions for questions that are commonly asked and faced by beginners in valve designing and construction. Valve Amplifiers is a masterful hands-on guide for both experts and novices who work with tube audio equipment, and for electronic hobbyists, audio engineers, and audiophiles. But, when you have by now look at this publication and you are therefore prepared to help make their own discoveries well ask you to take your time to exit an evaluation on our website we will submit each positive and negative critiques.

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In Building Valve Amplifiers, Jones leaves out most tube-circuit theory there are only about ten formulas in the book, for example. In other words, both books complement each other and can be viewed as a two-volume set.

At over pages, this book is too large to have been tacked on as an appendix to Valve Amplifiers. Do not get me wrong, I am happy to pay for two books and I prefer many smaller books to one fat book; after decades of reading 1,page computer reference books, books so heavy that one dropped from a window could lead to murder charges, I long for easy-to-read-in-bed sized books.

The punch line is that I very much like this book and I lend it my unalloyed recommendation. Having said that I must admit my prejudices. First, I have met Morgan Jones and we occasionally e-mail back and forth.

He is jewel of a fellow and I cannot imagine not instantly liking him. Considering how large is the ratio of charlatans, conmen, and imposters in high-end audio, he stands out as a genuine NOS Genalex KT88 in a crate otherwise filled with Chinese 6L6s. And the only thing worse is trying to do so over the phone or through e-mail. Unlike commercially-built gear, these boat-anchors in waiting may never have worked.

Given that fact, how does one sort out the crux of the problem—and long distance, at that—bad component, bad wiring, bad layout, under-specified parts…?

I have seen it all: volt power supply capacitors burdened with a volt power supply, grid-stopper-free amplifiers that oscilate at full power at 90MHz, ground buses that look they were designed with the aid of a spiral graph or illicit drugs , backward rectifiers, huge solder joints the size of cherry pits, heavy coupling capacitors tack soldered in place so flimsily that they easily shake lose and fall to the floor, high-voltage-carrying wire protruding from the chassis.

Thus, in terms of my workload, I can only benefit from more tube-loving audiophiles reading this book. Third, he uses the Broskie-Cavalli-Jones headphone amplifier as one of his practical examples, which was a pleasant surprise. It was Alex Cavalli who introduced me to Morgan Jones.

So now that you know that I like Building Valve Amplifiers, why should you like it too? To start, it is well written. Jones writes the way I wish all technical books were written: to the point, clearly, and with a human touch. Explaining carefully, but never excessively, Jones is out neither to impress nor to intimidate. In fact, portions of the book have the slight feel of a confessional, as if it were a catalog of how not to make the mistakes he once made.

And many solder slingers are boldly lazy; they maintain that all the testing that is needed is to flick on the power switch, as the equipment will either work or not work. If only that were true. Analog gear is like life itself, where Perfect Health and Death are but thin lines that bracket a huge expanse of gray area that is filled with varying degrees of tiredness, decay, illness, atrophy, enfeeblement, and stupor. No amplifier works perfectly; each bends and twists the input signal in its own way, as none of its parts is perfect; nor is any immutable, as time ages all that is physical.

Testing allows us to see into the gray. It reveals problems that no amount of tube rolling or part-brand swapping will solve. Furthermore, testing promotes understanding more effectively than any other means.

If you want to know how an amplifier works, test it, with your ears, a scope, an FFT, and whatever other tools you have available. In addition, audio testing, like racecar testing, is neither as simple nor as obvious as Consumer Reports would have us believe.

Did you know that tube amplifiers can suffer from slew-limmited distortion? They can, and do you know how to test for it? Building Valve Amplifiers expalins how. A key point here is that audio electronics has its own subtleties and important details that do not appear on the radar of most other electronic undertakings.

For example, as long as a digital clock keeps accurate time, it little matters if its power supply suffers from poor regulation, ground loops, or high noise.

Well, yes. I wish a full-bodied table of contents and a more-extensive index had been included, so better searches could be performed. Morgan Jones has done us all a great favor by writing Building Valve Amplifiers.

We should return the favor by buying it and defending it. Unfortunately, I expect this book may not get a fair press. One reason that readily comes to mind is that for every tube-loving audiophile there are at least ten tube-loving musicians. Tube-based music amplifiers are to high-end tube amplifiers what country music is to classical music: related, but neither wishes to admit it.

What the hell is a constant-current source," they will wonder. On the other hand, solid-state-loving audiophiles and musicians will not even vex themselves by looking at Building Valve Amplifiers, but then at least they will not bother leaving a disagreeable review at Amazon. Prove these jokers wrong, and buy and support Building Valve Amplifiers.

We will return to more tube circuits. Aikido PCB buyers have asked me to sign thier boards! Can you believe it?

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Download EBOOK Valve Amplifiers PDF for free

In Building Valve Amplifiers, Jones leaves out most tube-circuit theory there are only about ten formulas in the book, for example. In other words, both books complement each other and can be viewed as a two-volume set. At over pages, this book is too large to have been tacked on as an appendix to Valve Amplifiers. Do not get me wrong, I am happy to pay for two books and I prefer many smaller books to one fat book; after decades of reading 1,page computer reference books, books so heavy that one dropped from a window could lead to murder charges, I long for easy-to-read-in-bed sized books.

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