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24th April 2006, 01:44 PM
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#1 |
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diyAudio Member
Join Date: Jul 2004
Location: Kayseri/Turkey
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need help for Marshall PCB
hi all
i just converted this marshall schematic ( power amp section only ) into pcb lay out : http://www.drtube.com/schematics/marshall/1986mk2jp.gif i convert it manually on paper , and then draw it with diptrace , i checked it out so much , but it s so easy to make a mistake and dont see it as u know , does any body see any errors on it ? thanks  at sure i ll make it much compact but just wanna check it out this first version of it , then try to change it , ( i removed the 47k resistor from 16ohms output of transformer cuz my transformer doesn t have the 16 ohm out put )
__________________
Marge, don't discourage the boy! Weaseling out of things is important to learn. It's what separates us from the animals! Except the weasel. 
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24th April 2006, 03:02 PM
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#2 |
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diyAudio Member
Join Date: Oct 2004
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Hi,
I found one: just in the middle you placed a 470K resistor... in the schematic this one is 470 Ohms.. I assume you place the components of the first tubes on a different board?? Kees |
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24th April 2006, 08:19 PM
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#3 |
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diyAudio Member
Join Date: Jul 2004
Location: Kayseri/Turkey
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thnx , i ll build an ampeg v3 pre amp instead of this marshal
__________________
Marge, don't discourage the boy! Weaseling out of things is important to learn. It's what separates us from the animals! Except the weasel.
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