The Wintersweet High-Vividity Project

HighVividity · 27th June 2008, 06:39 AM

Hello, I am happy to announce the Wintersweet high-Vividity Project. The detail is at http://www.wintersweet.com/high-vividity

It now has an amplifier design. I attach the picture below. The forum has a tight file size limit, so I can only attach a small one here.

Comments and questions are welcomed.

HighVividity · 27th June 2008, 06:41 AM

Here is the schematic. Again, it is too big to post so I can only post a small one. Please go to the website for the big one.

HighVividity · 1st August 2008, 08:43 AM

Waveforms added. More waveforms are available on the site.

kevinkr · 1st August 2008, 05:37 PM

You can use imageshack to host the pictures and diagrams and post the links here.

HighVividity · 1st August 2008, 07:50 PM

Thank you. Now I can post big photos.

I love music. I know electronics. Here comes the Wintersweet High-Vividity project: to make a good audio system to listen to music. After several years of reading, experimenting, thinking, I re-discovered the golden rule: Linearity is still King.

I started from the amplifier. My first attempt was to make a better cathode-follower amplifier. People had long praised the superior linearity of a cathode-follower output stage, but they all pointed out the problem -- the requirement for a driver stage with both good linearity and high dynamic range, which is daunting if not impossible.

Until now. People stick to old dogmas and forget that technology is advancing. I discovered the voltage booster circuit (for example, Figure 12 in AN-272 ) for operational-amplifiers. I designed one with at least 420Vpp non-distortion output, or 600Vpp max output, and married it to the cathode follower output stage. Wintersweet High-Vividity Rev. 0 is born.

While designing, building and improving Rev. 0, I get some ideas about what Rev. 1 will be like. It can only be better, that is for sure.

I always refer to my project as Wintersweet High-Vividity, because I expect people to design their own High-Vividity systems. This amplifier and its variants can be used to drive tubes like 845, 211 etc. It can be the best driver ever for those big tubes. For 300B, 2A3 etc, a un-scaled version can be used to drive them. For example, with the middle PNP transistor omitted and the feedback loop re-arranged.

the Amp Schematic Waveform1 Waveform2 Waveform3 Waveform4 Waveform5 Waveform6 Waveform7 Waveform8

1st August 2008, 05:37 PM	#4
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	You can use imageshack to host the pictures and diagrams and post the links here. __________________ www.kta-hifi.net

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1st August 2008, 07:50 PM	#5
HighVividity diyAudio Member Join Date: Nov 2006	Thank you. Now I can post big photos. I love music. I know electronics. Here comes the Wintersweet High-Vividity project: to make a good audio system to listen to music. After several years of reading, experimenting, thinking, I re-discovered the golden rule: Linearity is still King. I started from the amplifier. My first attempt was to make a better cathode-follower amplifier. People had long praised the superior linearity of a cathode-follower output stage, but they all pointed out the problem -- the requirement for a driver stage with both good linearity and high dynamic range, which is daunting if not impossible. Until now. People stick to old dogmas and forget that technology is advancing. I discovered the voltage booster circuit (for example, Figure 12 in AN-272 ) for operational-amplifiers. I designed one with at least 420Vpp non-distortion output, or 600Vpp max output, and married it to the cathode follower output stage. Wintersweet High-Vividity Rev. 0 is born. While designing, building and improving Rev. 0, I get some ideas about what Rev. 1 will be like. It can only be better, that is for sure. I always refer to my project as Wintersweet High-Vividity, because I expect people to design their own High-Vividity systems. This amplifier and its variants can be used to drive tubes like 845, 211 etc. It can be the best driver ever for those big tubes. For 300B, 2A3 etc, a un-scaled version can be used to drive them. For example, with the middle PNP transistor omitted and the feedback loop re-arranged. the Amp Schematic Waveform1 Waveform2 Waveform3 Waveform4 Waveform5 Waveform6 Waveform7 Waveform8

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