Zen headamp. PCB, my ver. - Page 4

kenev · 10th January 2010, 06:03 PM

HI Stream,

Excellent work!!

Just a quick question: in your latest layout I see a TO-92 device, named Q7 and labelled as "1815". Is that the BC550 transistor (Q3) shown at the schematic in post #11?

Regards,
Evangelos

Stream · 11th January 2010, 10:45 AM

Hi kenev,
Thanks for kind word.
It is 2SC1815. You can use ZTX450 instead or BC550, but BC550 has another pinout (as I remember).

My build is going slowly. 9 Jan I ordered last parts, and today "laserprinted" amp's pcbs (but not etched yet).

kenev · 12th January 2010, 05:32 AM

Hi Stream,

Thank you for your reply.

I have downloaded the freeware version of Eagle and have been trying to find out how I can print the board (just the "copper" part), but couldn't come to a result. Is there any quick instructions you could help me with?

Regards,
Evangelos

Stream · 04:58 PM

kenev,
Goto:
View -> Display\Hide layers...
Check only:
Bottom, Pads, Vias, Holes.
Then just print this

BTW don't use my PS design - it's unfinished!

P.S. Can Anyone help me with ground wiring? Check this please:

Stream · 13th January 2010, 07:07 AM

Hmm... Answer is in Marcello's files (from article)

12th January 2010, 04:44 PM	#34
Stream diyAudio Member Join Date: Aug 2008	kenev, Goto: View -> Display\Hide layers... Check only: Bottom, Pads, Vias, Holes. Then just print this BTW don't use my PS design - it's unfinished! P.S. Can Anyone help me with ground wiring? Check this please: Last edited by Stream; 12th January 2010 at 04:58 PM.

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10th January 2010, 06:03 PM	#31
kenev diyAudio Member Join Date: Oct 2002 Location: Athens, Greece	HI Stream, Excellent work!! Just a quick question: in your latest layout I see a TO-92 device, named Q7 and labelled as "1815". Is that the BC550 transistor (Q3) shown at the schematic in post #11? Regards, Evangelos

11th January 2010, 10:45 AM	#32
Stream diyAudio Member Join Date: Aug 2008	Hi kenev, Thanks for kind word. It is 2SC1815. You can use ZTX450 instead or BC550, but BC550 has another pinout (as I remember). My build is going slowly. 9 Jan I ordered last parts, and today "laserprinted" amp's pcbs (but not etched yet).

12th January 2010, 05:32 AM	#33
kenev diyAudio Member Join Date: Oct 2002 Location: Athens, Greece	Hi Stream, Thank you for your reply. I have downloaded the freeware version of Eagle and have been trying to find out how I can print the board (just the "copper" part), but couldn't come to a result. Is there any quick instructions you could help me with? Regards, Evangelos

13th January 2010, 07:07 AM	#35
Stream diyAudio Member Join Date: Aug 2008	Hmm... Answer is in Marcello's files (from article)

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