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작성일 : 04-09-13 15:58
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[Kirungs GM70 SE] 덧붙힘 긍를 삭제했는데 원본이 없어져 버렸읍니다...낭패
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글쓴이 :
모찌
 조회 : 2,770
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올초인가.... 일렉트라 프린트 오디오의 잭앨리아노에게 이메일과 전화를 통해 대출력 싱글앰프를 의뢰한적이 있는데... 그때 설계에 들어간 앰프가 회로도가 나와 공개가 되었네요. 저는 제작을 의뢰했다가 막판에 선오디오 300비 피피를 구입하고 주문을 취소하였는데...( 큰 이유는 연락자체가 쉽지 않고 이메일 답신이 밍기적 거리는 게 가장 큰 이유였읍니다. )
전화상으로는 굉장히 호남아에 맘씨 좋은 아저씨 같은 인상이었읍니다.
그때 앰프에 대한 몇가지 얘기를 나눴는데... 그 때 메일로 받은 그사람의 앰프 제작의 몇가지 원칙을 써봅니다.
Kim,
Your English is very good when you are writing.
I understand now.
I can tell you of my experience with many years of design.
The dynamics are very important in all designs.
There are many old designs that are slow and with no bandwidth.
You may have heard these and assumed that SE is not good.
The best way to get a very dynamic operation is to have power and slew rate.
Slew rate is the ability to move a voltage as quick as possible to do work.
Using few tubes as possible to do the work needed is the best way to do this.
If you have a design that has one tube that is the voltage amp and driver and a power tube to get the power needed, this will give speed. We have a design with two tubes that 1/2 volt will get 21watts out. This design is fast due to the high amplification first stage and combination driver for the power output. The bandwidth is -1db 24hz to 25khz. The bandwidth you request is only possible with P-P with feedback. The feedback will increase bandwidth but will compress dynamics. The linear motion of the input will not be the same for the power output motion of a feedback P-P. P-P's without feedback have crossover distortion at low levels and are not good for high end application. P-P will supply very good power that will show as good dynamics but will lack life. SE with power and sensitivity and minimum tubes will give excellent performance. The other thing that must be taken care of is the speaker efficiency. Every 3db of acoustic level the power must double. If a speaker is 100+db efficient then the power needed is very small and the dynamics will appear. This type speaker is proper for low level SE designs so the dynamics that are in the design will work. As for bass this needs power and most high efficiency speakers have no bass. Bass needs to move large amounts of air. We normally use a powered subwoofer for this position. It is not good to use SE for bass. This arrangement should give you what you need.
The circuit you sent is very good but it is a P-P and will have crossover distortion.
This cannot be eliminated except with feedback. It will have power and bandwidth but will be compressed as far an amplitude linearity. The 6C33 is a power supply pass tube and will not be linear over the range work required in operation. It was not designed for audio. The circuit would be a good bass amp. The circuit we have been building lately is the 320bsl with 6HV5 driver. This offers 20+watts with 1/2v input. The circuit is on the website
www.electra-print.com and is called the hyperdrive. You can build this or we can also. The comments you make about capacitors are not completely true but I understand that too many of them will cause phase shift and this will slow down the slew rate. If capacitors are used in only necessary positions the performance will be good. To completely eliminate them is a design nightmare.
We can build the 320/6HV5 hyperdrive monoblocks for $2400.00 per set plus shipping. The P-P's will need more information if we are building them. Output tubes may be substituted if necessary due to availability. I hope this will answer some questions.
Hope to hear from you,
Regards, Jack Elliano EPA
그당시 나눴던 대화가 주로 싱글과 피피에 대한 얘기와 저역 구동에 촛점을 맞추고 있었읍니다. 그러다가 결국 gm70이라는 관으로 결정을 하고 설계에 들어갔었는데 결국 취소되었지요..... 그러나 그는 그관의 싱글앰프 주문이 계속 들어와 계속 설계는 하는 것으로 알고 있었는데 이제야 끝이 나서 회로가 공개되었나 봅니다.
pdf 화일로 올립니다.
pdf파일도 같이 없어져 버렸는데.. 난감하내요. 이건 저장해두지 않았는데..
GM70을 목표로 했던 계획대로라면 300B앰프는 직결로 만들어도 괸찬지
않았나 싶기도 합니다.
어쨓던 지난번에 300B 싱글과는 다른 몸체로..컴퓨터 서브랙을 얻어서
파워트랜스류를 넣다가 중단하였지만 2A3/PP를 완료한후에..
잔여잔업을 계속하기로.. 합니다.
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