Please comment my pcb P3a

roly3055 · 18th January 2005, 03:28 PM

The PCB was made in Eagle 4.13 so if someone wants .pcb file let me know.

Si pueden opinar en espanol, mejor, soy cubano y no muy bueno con el ingles

Gracias

BrianGT · 18th January 2005, 03:30 PM

post a screenshot, and I will try to comment

--
Brian

azira · 18th January 2005, 04:38 PM

It looks like you would be able to get around 1 of those top side jumpers if you routed pin 2 of the MJE15034 around the other side of pin 3. You'd cut into your VCC plane only a little bit in doing so.

There look to be quite a few ways of routing around the other top side jumper as well but those are less straight forward.

Other than that, build it and let us know how it comes out.
--
Danny

azira · 18th January 2005, 04:40 PM

One more comment. If you expand some of your poly areas to take up more of the black space, you could really cut down on the amount of etching you would have to do. Make your acid go a little longer for you as well.

roly3055 · 19th January 2005, 01:43 PM

ThanK azira , work very good, this is the photo of the first I make (in attach) but the transistors are not on board and distribution are more irregular with much more black sapce.

I'll fix that.

Thank for comments!

roly3055 · 20th January 2005, 03:01 PM

Here's the updated PCB.
Any new suggestions?

Tamaz · 22nd May 2005, 04:23 PM

Hi, i borrow your thread a little, hope its ok.
Im totally new in all this amp-building. Ive got a idea that i should build an amp and found the Project 3A wich sound like a good beginner project. Ive got some basic electronic knowlage and soldiering is not a prob for me. Now i got all the electronic components i need fpr the amp. I feel like i do NOT have the knowlage to do, is to design the PCB myself. Now i wonder where to find a good PCB to use. This one looks good, but i have no experience in this so my oppinion is worth nothng.

I do not care that much about how super good it sounds, as long as it aint sound like crap. This projekt is for me mostly the fun in building and creating. Not to get the best sound in the world if you understand what i mean.

If you would like to send me your .pcb file it would be great! my e-mail is tamazerd@hotmail.com

roly3055 · 6th July 2005, 06:55 PM

New Update[IMG]http://[/IMG]

Fritzell · 6th July 2005, 08:48 PM

Tamaz>>
You could find some quite easy circuit to start with. If its not too advanced you can build it on "löd-torn"

Its like a lenght of metall pieces you can solder on. It gets very provisoriskt and not so good looking but it works. Should be avialable at an electronic stuff store or something like that. Its probarly easier and cheaper then making a pcb.
I built a chip amplifier on this stuff and it worked very well. Might be tighter to build with discrete components but its quite fun to array and fix it in your own way.

Pic of the amp
http://upl.silentwhisper.net/uplfold...5/P7280004.jpg
This is the first of my amp projects that actually worked

Im intending to build a discrete solid pass amp further on though
link to the project
http://www.electro-dan.co.uk/electronics/TDA2040.html
Its an easy project and cheap. 20W integrated circuit for about 50SEK

Sorry for disturbing the thread

norvbul · 9th August 2005, 10:50 PM

Hi roly3055,

Could you send me the .pcb file
Thanks
email: norvbul@yahoo.com

norvbul

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18th January 2005, 03:30 PM	#2
BrianGT diyAudio Moderator Emeritus Join Date: Jan 2002 Location: near Atlanta, GA	post a screenshot, and I will try to comment -- Brian

18th January 2005, 04:38 PM	#3
azira diyAudio Member Join Date: Dec 2003 Location: Near Seattle	It looks like you would be able to get around 1 of those top side jumpers if you routed pin 2 of the MJE15034 around the other side of pin 3. You'd cut into your VCC plane only a little bit in doing so. There look to be quite a few ways of routing around the other top side jumper as well but those are less straight forward. Other than that, build it and let us know how it comes out. -- Danny

18th January 2005, 04:40 PM	#4
azira diyAudio Member Join Date: Dec 2003 Location: Near Seattle	One more comment. If you expand some of your poly areas to take up more of the black space, you could really cut down on the amount of etching you would have to do. Make your acid go a little longer for you as well.

22nd May 2005, 04:23 PM	#7
Tamaz diyAudio Member Join Date: May 2005 Location: Stockholm	Hi, i borrow your thread a little, hope its ok. Im totally new in all this amp-building. Ive got a idea that i should build an amp and found the Project 3A wich sound like a good beginner project. Ive got some basic electronic knowlage and soldiering is not a prob for me. Now i got all the electronic components i need fpr the amp. I feel like i do NOT have the knowlage to do, is to design the PCB myself. Now i wonder where to find a good PCB to use. This one looks good, but i have no experience in this so my oppinion is worth nothng. I do not care that much about how super good it sounds, as long as it aint sound like crap. This projekt is for me mostly the fun in building and creating. Not to get the best sound in the world if you understand what i mean. If you would like to send me your .pcb file it would be great! my e-mail is tamazerd@hotmail.com

6th July 2005, 08:48 PM	#9
Fritzell diyAudio Member Join Date: Jul 2004 Location: Sweden	Tamaz>> You could find some quite easy circuit to start with. If its not too advanced you can build it on "löd-torn" Its like a lenght of metall pieces you can solder on. It gets very provisoriskt and not so good looking but it works. Should be avialable at an electronic stuff store or something like that. Its probarly easier and cheaper then making a pcb. I built a chip amplifier on this stuff and it worked very well. Might be tighter to build with discrete components but its quite fun to array and fix it in your own way. Pic of the amp http://upl.silentwhisper.net/uplfold...5/P7280004.jpg This is the first of my amp projects that actually worked Im intending to build a discrete solid pass amp further on though link to the project http://www.electro-dan.co.uk/electronics/TDA2040.html Its an easy project and cheap. 20W integrated circuit for about 50SEK Sorry for disturbing the thread

9th August 2005, 10:50 PM	#10
norvbul diyAudio Member Join Date: Oct 2002 Location: Montego Bay, Jamaica	Hi roly3055, Could you send me the .pcb file Thanks email: norvbul@yahoo.com norvbul