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Old 11th September 2006, 07:03 PM   #1
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Join Date: Dec 2005
Location: Italy
Default Mg15cdr

Hallo !

I need to replace all IC of a guitar-amp of a friend...
The amplifier is a Marshall MG15CDR but on the schematics
there is alone three NJM4558.
vice-versa on new MG15CDR there is an TL072 and two NJM4560.

The question is : Where do I have to put the TL072 ?
i have forgot this...
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Old 12th September 2006, 03:39 AM   #2
Enzo is offline Enzo  United States
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Join Date: Sep 2004
Location: Lansing, Michigan
It doesn't matter. Make all three 4560 if you like, or go back to all three 4558, or make all three TL072, or mix them. That is just a basic little practice amp, and the parts are not critical. I suppose if I had to make a preference, I would stick the TL072 in the first stage at the input.
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Old 12th September 2006, 08:08 AM   #3
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Join Date: Dec 2005
Location: Italy
Thanks for the answer !

I also think me that it is better to put the TL072 as an input stage.

This is the input stage wit new ampop IC

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