digi01

OPA637BP setting up

the power supply parts that I used is my regulator pcb.

papaya86,your high version lcking is almost finished.I am glad post some layout pic 1,top view

finally,I find a sexy chassis.I can't help to assemble it. the amp can be set up in stereo 2X30W,or bridging as a single 100W amp.

connected pic ,wish you guys is happy.

all things is done the power supply pic view:

hi bram, still can not find a sexy case? I find this while modify my websites yesterday: http://tzic.bjtzh.gov.cn/o/studio/digi01-gainclone.htm I am almost forget it.I think this case maybe suitable for you to use. the size is 255x136x104mm.S$20.

VERY NICE,looks pleasure

wow,good do you have using the pcb mounting transformer made in BEIJING?

It is a balanced line stage buffer,for bridging. thank you

the parts cost is around S$120 but hand work is a hell

the diode is MUR860. I have tried opa541,it sound good and have a fine input performance(opa chips is mos-input stage).but the chips price is costly compare with LM3886 or 3875. digi

it is LM3886 invert gainclone and regulator board. the silver tube is nippon caps.this is achieved by skinning the caps,ie taking off their plastic jackets.Some people claim that this changes the sound although I cannot hear any difference but it does make them look nicer and to avoid soldering burns on the plastic jacket.

I am making now...will post the finished pic asap.

very useful bram,thank you for your sharing cheers

I use 3 6N11 tubes for starting,it can be roll with 6dj8 or some others good tubes. I can not find original earmax or Pro

I like hdam style,in this way the amp upgrade easly.here is my ppa chassis,the buffer is diy now.

looks cool,bram what about its sound?

looks fine.but it should need a remote control circuit,or it can using by hand like origonal pots?

enjoys

rear view:

thank you bram the amp part is finished.搭棚焊接的难度超过了我的预计，尤其是每个焊点需要盘绕固定，我不得不用弯头镊子和止血钳来辅助。 inside view:

I buy it from the elec-shop of BEIJING.

opamps in series,I think this way is ok. digi

sorry be so lazy to post,I have been busy with the graduation thesis recently. and sorry for the photo.Beijing is cloudy,so the photo is not very clear enjoys and have a good weekend digi