JC2012世界末日版——高效率低失真改进版JLH1969 Hi-Fi功放

jazzclassics · 发表于 2012-3-21 22:54

本帖最后由 jazzclassics 于 2012-3-21 23:29 编辑

Hi,

For those interested in JLH1969 but dismayed by the difficulty of designing the PCB and handling the Heat, here is some good news. The modeling, experiment and listening result is very encouraging. I name it JC2012 Doomday. JC2012 distinguishes from JLH1969 in that the former can work in Class A and/or Class B. While JC2012 maintains nearly all the good characteristics of JLH1969, it is a much more efficient than JLH1969. Just like JLH1969, JC2012 uses only 4 discrete semiconductors. The -3db frequency is from 20Hz to > 5MHz. The distortion component is predominantly 2nd harmonics. The quiescent current through the output pair is only 35mA. If anyone is interested in this design, please feel free to contact me or reply this post. Enjoy DIY.

lxy7208 · 发表于 2012-3-21 23:08

电路图呢看看也想玩

吹水小生 · 发表于 2012-3-21 23:09

请问楼主改了那里呢？我人蠢没看到是那里、、、嘻嘻、、、

呼啸沧桑 · 发表于 2012-3-22 00:40

本帖最后由呼啸沧桑于 2012-3-23 23:35 编辑

按楼主的图纸是每声道两对达林顿管的吧？？？可惜实物图中不见

楼主的安装图

石投 · 发表于 2012-3-22 01:06

双并达林顿，FFT看着挺漂亮。

百盗 · 发表于 2012-3-22 06:18

本帖最后由百盗于 2012-3-22 06:20 编辑

只看懂了前面说对喜欢1969不会弄PCB的朋友是好消息.后面说为各位DIY免费提供技术解答.
中间的主要内容基本看不明

healytian · 发表于 2012-3-22 07:09

好东西！比1969更简单的Jc2012集1969的优点，既可工作为A类也可工作为B类，线路简洁只用4个三极管？~3db的频率从20hz~5Mhz….

healytian · 发表于 2012-3-22 07:25

不知理解的对不对？但是相信此帖会必火！

chhw007 · 发表于 2012-3-22 07:58

2012太强悍了，有望成为2012年的爱折腾主流线路

jazzclassics · 发表于 2012-3-22 12:44

There are 4 TIP122 darlington transistors in the schematic and PCB layout. But one pair of TIP142 will be fine. TO3 package darlington will even be better. JC2012 basicly leverages the advantages of darlington to archieve better current gain at the output stage, such that the amp works fine in class A/B. JC2012's close loop gain can be varied from 20db to 40db, depending on the characteristics of the output darlington pair. The wide gain range is one of the major advantages over Hood's simple class-A. With JC2012, you can get rid of the pre-amp along with the bulky heat sink. That said, I have to recognise here that class-A has its own merit. So if you want to hear the best sound and not mind to waste some power on heat, then go for JC2012 class-A.

jazzclassics · 发表于 2012-3-22 13:13

回复 5# 石投
Thank you!

jazzclassics · 发表于 2012-3-22 13:18

不知理解的对不对？但是相信此帖会必火！
healytian 发表于 2012-3-22 07:25

Thank you very much! I hope to make friends with the JLH1969 followers. Together, we can make it better.

jazzclassics · 发表于 2012-3-22 13:24

下面是我对该电路输出功率、负载阻抗与电源电压之间关系的总结，并简化为一张速查表。方便做JC2012的朋友参考。

功率放大器输出功率、负载阻抗与电源计算表

jazzclassics · 发表于 2012-3-22 13:27

回复 9# chhw007
Thank you for your blessing.

狼牙棒 · 发表于 2012-3-22 13:45

Lou zhu ni de na xie ying wen wo shi zai kan bu dong ,yin wei wo ying wen shui ping shi zai bu xing,ma fan nin yi hou bie yong ying wen fa tie le ,yin wei wo men dou shi zhong guo ren,hai yin wei zhe shi zhong wei wang zhan.nin shuo hao ma?xi wang da jia dou neng cheng wei peng you!xie xie!

yzyx999 · 发表于 2012-3-22 15:54

这还是1969吗？听感如何？

lovexx · 发表于 2012-3-22 17:59

Lou zhu ni de na xie ying wen wo shi zai kan bu dong ,yin wei wo ying wen shui ping shi zai bu xing, ...
狼牙棒发表于 2012-3-22 13:45

我来翻译:楼主你的那些英文我实在看不懂，因为我英文水平实在不行，麻烦您以后别用英文发帖了，因为我们都是中国人，还因为这是中文网站，你说好吗？希望大家都能成为朋友，谢谢！

wzr200408 · 发表于 2012-3-22 18:14

提示: 作者被禁止或删除内容自动屏蔽

jazzclassics · 发表于 2012-3-22 18:15

回复 16# yzyx999
该机完全保留了1969的优点，听感非常饱满，有空气感，高频解析力超强，纤毫毕现。听交响乐大动态下的气势也可以发挥淋漓尽致。

jazzclassics · 发表于 2012-3-22 18:22

回复 17# lovexx
抱歉，请理解一下，JC2012诞生在深圳这个国际都市，并在hifidiy这样的国际网站上发表，当然不可避免地使用了国际通用语言。并没有对各位朋友不敬的意思。我早说过，我希望将国外的技术引进来，把国内的产品推出去。

[DIY制作] JC2012世界末日版——高效率低失真改进版JLH1969 Hi-Fi功放