| Williamson power amplifier | It was my first home-brewed tube amplifier. The power and output transformers were from Sansui. Driver and power tubes were 12AU7 and 6L6GC in triode connect. I was using a FET class A pre-amplifier at that time. The Williamson served me a few years and allowed me to learn a lot about building tube amplifier. | |
| The Mini 7 preamplifier | Base on one of the world famous preamplifier 'Mar*ntz 7'. In the past years, I have done a lot of cutting and trying, upgrading the components to improve her performance. She is my favorite. | |
| Tube regulator with Heater soft-starter | I'm looking for the way to re-use my used tubes. Everybody who uses a vacuum tube pre-amplifier should try this project. | |
| MOS. FET output stage I named it Baby-300B. |
Those good high power output transformers were hard to fine and expensive, so I looked for an easier way to built my amp. This project used only a few components that were easy to get, it is working without FB, no distortion was noticible, it was a great success. This amp is still working in my bedroom with LS3/5a. A preamplifier with high gain is required. | |
| MOS. FET Hybrid amplifier With 6FQ7/6SN7, I add some more gain to the Baby 300B. |
I built this 100W tube sound alike amplifier with the 6SN7 or 6FQ7 for driver and the MOS. FET for power output. I have built a total of 5 of these, one for myself and other four for my friends. This hybrid amplifier had beaten down a few expensive amplifiers on market during in A/B test. | |
| SE 300B power amplifier | Built in March of 1994. Although the 300B power tube and the SE output transformer are expensive, it is a worthy project. | |
| JA*IS DPL preamplifier | I got the PCB layout and the schematic after repair the heater regulator of this amplifier for one of my friends. This will be my next project. | |
| 6922 Hybrid amplifier | The Baby 300B and the 300B tube power amplifier are working without feedback. I like their sound very much. This will be my project after the DPL. | |
| Other Schematic | I put some single-end pp schematic in here. | |
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