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Vincent Zhang | Sep 21, 2025
The Titans of Tone: A Comparative Guide to 211, 845, 813, and 811 Vacuum Tubes
Vincent Zhang | Mar 16, 2026
Single-Ended Output Transformers Core Size, DC Bias, and the Art of the Air Gap
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 16, 2025
The 833 (FU33) Vacuum Tube in High-Fidelity Amplifiers
Vincent Zhang | Mar 28, 2026
Soft Start and Delayed B+ Power-Up Circuits for Vacuum Tube Amplifiers — Professional Revised Edition
Vincent Zhang | Jun 26, 2026
The Complete Guide to Vacuum Tube Replacement: Types, Substitutes, and When to Replace
Vincent Zhang | May 08, 2026
EL34 vs 300B: A Comprehensive Technical Comparison for HiFi Enthusiasts
Vincent Zhang | Nov 21, 2022
Brief of Vacuum Tube Models and Replacement
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