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Designing Power Supplies for Valve Amplifiers, Second EditionDesigning Power Supplies for Valve Amplifiers is a unique guide to the operation and practical design of linear power supplies, especially for valve equipment. Audiophiles, guitarists and general hobbyists alike will find this book an invaluable source of detailed information on transformers, rectifiers, smoothing, high voltage series and shunt regulators, and much more. Aimed at intermediate to advanced level hobbyists and professionals, it teaches
Designing Power Supplies for Valve Amplifiers is a unique guide to the
operation and practical design of linear power supplies, especially for valve
equipment. Audiophiles, guitarists and general hobbyists alike will find this
book an invaluable source of detailed information on transformers, rectifiers, smoothing, high-voltage series and shunt regulators, and much more.
Aimed at intermediate to advanced-level hobbyists and professionals, it teaches the principles of power supply design through easy-to-read explanations and minimal math. Numerous practical circuits are included; with over 200 diagrams and figures it asserts itself as an essential handbook for any tube amp enthusiast.
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4.6 ★★★★★
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★★★★★ 5
Profound and timely
Format: Paperback
If I could give this book 6 stars I would. The way the world is right now, I needed to do a deep dive into anger. And I needed to see how God wants me to handle my anger. There were some very challenging and humbling parts to this book that I needed to hear. All the application questions at the end of each chapter helped me solidify what I learned and what I needed to evaluate personally. Which leads me to the statement that this book was deeply personal to me and I am grateful for the changes it’s helped me make to reflect God more and myself less.
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Reviewed in the United States on March 26, 2026
★★★★★ 5
Profoundly biblical and wise
Format: Paperback
David Powlison’s Good and Angry is a powerful book. In the book Powlison dives deep into what anger is and then gets very practical about how to biblically deal with your own anger issues (issues, he assures us, we all have).
From the outset, Powlison makes it clear that anger, while dangerous, can be handled to produce good. “At its core anger is very simple,” Powlison says, “It expresses ‘I’m against that’” (39). Powlison says that each of us handles anger differently. Some of us freeze over, some of us quietly brood, some of us simmer, some of us explode. Powlison encourages us not to look at the way others mismanage worse than us, but rather, how do we mismanage anger? Each type has their own blind spots.
Powlison then dives into anger itself. Anger is about our displeasure toward something, so what are we displeased with? And why? How are we justified? Unjustified in our anger? And what do I want to happen? Anger is physiological. As embodied beings, anger manifests itself in us physiologically. How is it impacting me when I’m angry?
Powlison then dives into mercy, what he calls a constructive displeasure, or constructive anger. When the constructive displeasure of mercy is functioning as it ought, it has four characteristics: patience (a wonderful biblical synonym of patience is “forbearance”), forgiveness (which is “mercifully unfair” (80)), charity (a spirit of magnanimity), and constructive conflict (“Mercy is not a free pass. It is an invitation to turn and repent” (94). All of these fundamentally point to the work of God and his righteous response of anger to our rebellion. “The constructive displeasure of mercy means the redemption of the world” (102). Powlison walks through how God’s anger works: through his righteous and holy response to our sin, to him taking his wrath upon his son on the cross. He concludes, “God’s wrath is your hope. God’s wrath is my hope. We don’t often hear that, but it appears everywhere in the Bible. Wrath is our hope because love masters anger” (121).
The final portion of the book steps back and helps us move through analyzing our own anger. Powlison uses James 4:1-12 to help us analyze our own anger issues. At the heart of this analysis is James’s own analysis of his hearer, that they are fighting and quarrelling because of their “desires that battle within” them. In other words, if we have an anger problem (which we all do), we have a malformed desire problem. In other words, we have a heart problem. Significant in digging into this question is the ability to analyze my own motives. The issue isn’t what has happened with me, but is my heart and my heart’s motives and desires in the midst of any given situation. Key questions to ask myself when in a moment of anger are: “what do I want?” “what do I fear?” and “what do I most love?” (154-55).
Powlison concludes with a strong word of hope. God is in the process of changing us and reshaping our heart. Our problem, Powlison says, is that we tend to talk to the wrong person in the midst of our anger – ourselves. But when we turn and talk to our Good Shepherd, we will experience hope and change.
I’m so grateful for Powlison's Good and Angry. It is a profoundly biblical and wise book with both subtle and profound insights. I know I have been impacted by the book personally and will both turn to it in the future for personal use and as a resource for others who struggle with anger.
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Reviewed in the United States on April 21, 2017
★★★★★ 5
But he is also convinced that your anger does not have to be a problem and this book is intended to help redirect so that we can
Format: Paperback
David Powlison thinks you have an anger problem, and a serious one at that. It is not because he knows you personally, but because he is one who has long studied the fallen heart. But he is also convinced that your anger does not have to be a problem and this book is intended to help redirect so that we can be both good and angry.
Anger, as Powlison who is the executive directory of CCEF, defines it, is a sense of opposition to something that is both important and wrong. That means it is a moral response. As those who are created in the image of God we all have come wired for the capacity to express anger. But, as Powlison carefully shows, we have a problem. Our anger is misdirected and misguided because of sin. Not only in the little daily frustrations and irritations, but also in extremely destructive ways. The goal, according to Powlison, is not to eliminate anger, but to have it remade into the image of God by the grace of the gospel. Far from being a therapeutic self-help book, his concern is that we come to understand how anger can coexist with forgiveness, patience, charity, and constructive displeasure.
This book should prove to be an excellent resource. However, if you pick it up with the intention to help someone else—your husband, wife, child, friend, or congregant—be prepared to confront the reality of your own anger first. Powlison has a wonderful way of acutely diagnosing anger as a personal problem for all, even those who do not consider themselves angry. A couple of highlights would be his detailed examination of God's wrath showing readers why it is actually because of God's wrath that we have hope. His chapters dealing with every day anger, long-held bitterness, and anger against God also flow from a counselor's heart as he addresses difficult and awful painful truths.
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Reviewed in the United States on September 23, 2016
★★★★★ 4
Good Christian Perspective on Anger
Format: Paperback
I read this book over the course of three months; it was not hard to get through but other books had to be read first because of library due dates and without intent, it kept getting pushed lower on my priority read list. I finally got back to it earlier this week and finished up the remaining chapters. After reading it, I have a better understanding of anger through a Christian perspective. Author David Powlinson is a counselor so he brings with him expertise in working with people who have suffered bad things. Unlike some counselors who give guidance without the Scripture, Powlinson incorporates God and His love in each chapter since God is the ultimate source of freeing us from the burden of anger and the other emotions that accompany anger. The book is broken down into four sections: Our Experience, What is Anger?, How to Change, and Tackling the Hard Cases.
Everyone is plagued by anger of different intensities and gets angry for different reasons and everyone deals with it in different ways, yet we are all the same in that we need to face our anger and seek God’s guidance so we may handle our anger in a constructive and positive way that glorifies Him. That is why I recommend this book to everyone, especially those who may be going through a hardship in life that makes them angry. I did not agree with everything Powlinson said or may not have understood where he was coming from on some things, but I still think he did a great job writing a book on a massive and complicated subject.
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Reviewed in the United States on January 6, 2018
★★★★★ 5
Brilliant and detailed.
Format: Kindle
I can’t say a single thing I felt missing from this book and can go on and on about what was included that I didn’t expect and found greatly helpful.
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Reviewed in the United States on October 22, 2025