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Vincent Zhang | Jul 29, 2026
How to Choose the Right Vacuum Tube Amplifier Output Transformer (OPT)
Vincent Zhang | Oct 05, 2024
Tube Buffer Preamplifiers: Understanding the Classic Audio Technology
Vincent Zhang | Jan 04, 2026
The Enduring Legacy of the 1969 JLH Class A Amplifier
Vincent Zhang | Jul 27, 2026
Parallel-Feed (Parafeed) Output Transformers: A Practical Guide
Vincent Zhang | Mar 28, 2026
Soft Start and Delayed B+ Power-Up Circuits for Vacuum Tube Amplifiers — Professional Revised Edition
Vincent Zhang | Sep 19, 2025
The Ultimate Upgrade? Exploring Amorphous C-Core Output Transformers for the 300B Tube Amp
Vincent Zhang | May 21, 2026
Fostex FE108-Sol vs FE126En: A Detailed Full-Range Driver Comparison
Vincent Zhang | Sep 08, 2025
A DIY Guide: Building a Power Transformer for an EL34B Push-Pull Tube Amplifier
Vincent Zhang | Jun 10, 2026
Transistor Matching for Audio Amplifiers: Why It Matters and How to Do It Right
Vincent Zhang | Jun 02, 2025
Vacuum Tube FU29 Push-Pull Tube Amplifier: A Deep Dive into Vacuum Tube Audio
Vincent Zhang | Mar 18, 2026
Output Transformers in Vacuum Tube Push-Pull Amplifiers--Core Size, Power, and the Science Behind the Iron
Vincent Zhang | Sep 14, 2026
274A vs. 274B vs. 5U4G vs. 5R4GY vs. 5AR4/GZ34: Rectifier Guide for 300B Amplifiers
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