huangyong

P100升频电源，输入交流115V或220V，输出交流电压100V-120V，200V-240V可调，频率可变。分别是50赫兹，60赫兹，120赫兹，400赫兹。400赫兹是专为视频与工业而设计。输出功率100瓦。可供CD 机，DAC解码器，前级使用。比换1万元的电源线明显。 因为瓦数小,只能接在前机与CD上,工作原理是这样的,先把220交流电整成直流电,然后升频,有4个档50赫兹60赫兹120赫兹400赫兹,最好用到120以下,400赫兹时工作量瓦数太大,有点交流声,热量也大一些,,升到50---60--120--400时,再把它们送到输出变压器,最后送到电源插座输出.所以说,它把交流电完全与机器割离开来,听起来声音很柔和,背景也干净了,比换一条好的电源线有作用.国外同类产品都价格不菲.

buy a SOHA board and transfer all the parts there, easier to case it.. simple!!

this one for you heady, posts:888

wow.. kross.. that's capacitve ground coupling. used in medical equipment..

haha..loop is learning fast.. anyway.. ur buzz might be due to grounding prob.(pot to amp to rca) if your amp only picks up noise when the pot is turned to certain degree, then it is most likely grounding problem.

Hi heady.. i faced the same problem before, just tell you that it is definitely not mainly caused by transfomer.

interested ah?? let me find out other products too..

Check this out if you can read chinese. DIYEDEN I think it is an external sound card. but the price is damn cheap. cost only RMB275!!! http://shop.jdlaser.com/wareshow.asp?wid=104392

one of them.

Hello folks, seems like there are many USB DAC these while. Just curious what is your comfortable price range of having such add on to your PC/MAC for best possible audio experience. And hopefully we can feedback to the manufacturer that we want something cheaper!! thanks.

wow.. looks good. but does it come with original box? are you the first owner? how old is this baby? thanks.

hmm...that's interesting.. lift cable anyway, it's innovative and skills that enable good DIYer to use whatever he can find to achieve fanstastic sounding amp.. not necessary to use exotic and expensive teflon silver or whatever to impress, but sound so so only... 2 cents... i like your style.. digi01, always use some rare cable in ur amp, your military grade cable is good.. thanks.

hey heady, pls tell me how can i collect board from u.. thnaks

PSU is on baord isnt it? i can see a rectifier and RC stage and regulator

haha..nakedtoes, do you want to carry an umbrella with solar panel and walking around.... anyway this idea is interesting.. may be can try use ur shoe to charge.. kinetic energy..

thanks to my dad.. started with HD600

hooray!!!!.. SOHA on the way..

Qsilver, you just got ur ticket to join the DIY master club.. haha.. tt amp looks so ...funky.. can guess ur style..hehe..

board is going to ship out soon.. Edwin pls give ur address to digi01. thanks.

two Opamp, with what looks like a single JFET biased Class A. two voltage regulators, with what looks like a dual rail power supply. lots of Wima MKP 0.1uF/160V caps with what looks like a crossfeed circuit, or a CRC filter, perhaps? yet i have idea the the use of the 8 TO-220 parts below the RCA jacks. mind to explain what exactly did you do? looks like an unbuffered headamp. hey doc, tt's what excatly I thought, with the active components count, not too complicated. the circuit looks more like CRC to me, as crossfeed generally has more resistor than caps, if i m not wrong.

hi mychew, long time no see. where've u been? drop me a msg when u free, let's go for coffee..

Interested in Cayin. more details pls. thanks.

WOW .... look at the parts, spend so much on such simple circuit..

hello DIY friends, need to ask you guys, especially those experience ones, what is the major difference in term of sound quality between the 2. There're many types of IC buffer out there, more popular ones are BUF643, HA5002, While discrete buffer, we have Diamond buffer, Class A, AB, B buffer, and MOSFET buffer. so please tell me whay have you used and tell me the sound quality. Thanks.

wow..looks neat and tidy!!! but still far from the WOW effect.. suddenly have this thought, since many of us are ordering the board. May be it's time to have a DIY competition??? first ever DIY competiton in sgheadphones.net. may be can ask some local dealer to sponsor some good tubes as Prizes. in the same time we can strecth our DIY spirit + spirit of excellence. sounds good? anyone?