Greg J inspire me by building the mosfet headamp so simple.i made it point to point,i like its sweet sound. zang

a friend ask me repair her q5.i am not interest in fix job.i make a new one for her. -zang

is there anyone tired of over-industrialized pcb board? i make two classic otl,2*1w headamp with point to point work. it is fun. i think i can keep these small unit for long on my desk. i can not speak engilsh,pics below,slow host waitting be patient sch file:

i want to know how many customs headamp maker and how many user in the world?i talk about is hand work,not batch production. there are some hi-end salon in beijing,shenzhen,shanghai.they seek after top grade headphone system.

during 6 months silent,i rethink it.

powered by 2 9V battery,non rail splitter,the battery is connected in series,center point to Gnd.AD823 for 2channel amplification.

here is my layout,I have not signed the parts.the project is a update basis on 'MY' cmoy,thanks guzzler and tess. original 'MY' cmoy LINK some ideas of mine,and update to A47 breadboard version LINK A47 project layout,silk layer LINK1 LINK1'

the main board is completed,I am going to drop it in a tin.thanks P-A,your project is wonderful and crazy photo attached. Dr.Zang

all at http://digi01.hk.st thanks sijosae and all headwizer cheers digi

Zen is designed by Marcello,All the project's details and PCB layouts of the original version can be found in the Headwize site:LINK here is mine more pic LINK -Z

Hi all, My gilmore bb amp is completed.the layout idea is from member Arzela,finally I have revised some mistake. the amp is made up of 22 D667/B647 pair transistors. thanks Mr.gilmore. enjoy Zang more

http://headwize.com/ubb/showpage.php?fnum=3&tid=5340 this is my lately amp,its a cmoy plus a class B buffe,still simple to diy. any comments are welcomed

enjoys digi

The circuit is common RA-1,there is not a novel one. The part of the power supply is using the JRC4556 rail splitter.and white LED.the red cap is WIMA MKP10,4.7uf BP. Circuit part place in under the socket. It can drive er4s or grado series headphone.the sound is graceful,a little darkness evil

73

Hi, I'm new to making mini amps.the amp diy for a friend. ALPS volume pot and power switch,ero 0.47uf/100vMKT input caps.opa2604 plug in dip8 socket. the board size is 70mm x 33mm.

This little monster is my recent project, based on David Lin’s DC-king design. The design uses an opamp to drive a pair of matched transistors to run in Class AB mode, and a DC-servo to bring down the output DC. With this design, there is no capacitor in signal path and it is capable of output...

thanks morsel :") Have done some adjustment according to the need. 1,add the input caps C1R,C1L 2,remove the R1G it is softer to enable listening to the sense. used for reducing the sense of particle. 3,add 3 47OHM resistors in the outputs of three passways. Without these resistors,while...

I build this page show my projects,wish sweet tubes can easy diy. hello tubes,on my way 2004 year -digi

it's not about circuit design,I only fondness for the PCB layout design. In this times,there is no ingelligible verge about a brand or a diy work,really??

I have revised this classical mosfet AC power supply circuit again,and have making a module block now,Used for serving my series headamps. this is the original sch scan: the real things,this is my block psu,still in making... Who can talk about the detail of this circuit? Or...

indeed,it's an entirely new amplifier using some of the PPA concepts.I have not idea give it a name.Hdam structure in the control matrix of lift that I have introduced for pcb layout design,it is convenient to expand. should perhaps call it HDAM-amp(hdamp)? :") -digi

first pic,silver look case:

I have begin own ppa edition of the plot,hope that there are some light spots, Some is surmounted. To the structure of the circuit,I believe that simple is the best. Diamond buffer is good,But it is a separate components model,it exist dispersed quality and some another problems actually in...