Hi!
At the moment I´m looking for parts for a 18Watt lite. I´ve got some problems getting the right values for the electrolytic capacitors. Concerning the 18watt lite version II schematic, I need a 50u/50V, a 150u/50V, two 33u/450V and a 16u/450V.
From my suppliers I can only get:
56uF
180uF
33uF/350V or 56 uF/450V or 32+32uF/500V
22uF/350V
How critical are the exact values, is it ok just to substitute a higher value?
Greetings,
Klaus
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Electrolytic capacitor values
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loverocker
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They're all perfectly OK replacements - maybe only Eric Johnson and those cursed with 'golden ears' could hear a difference?
The 56uF and 180uF are ones that you might like to experiment with anyway once you have built it - i.e. to get more/less bass response. I think I currently have a 25uF and a 220uF in my WEM conversion.
You could probably wait and eventually find the correct values, but it may take time to find them so that holds the build up. And you're doing a Lite anyway, so absolute accuracy to the original 18Wer isn't really essential.
The 56uF and 180uF are ones that you might like to experiment with anyway once you have built it - i.e. to get more/less bass response. I think I currently have a 25uF and a 220uF in my WEM conversion.
You could probably wait and eventually find the correct values, but it may take time to find them so that holds the build up. And you're doing a Lite anyway, so absolute accuracy to the original 18Wer isn't really essential.
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KlausSp
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loverocker
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Oh I see. Well, the real experts ought to weigh in at this point, but I'm sure the 350V filter caps will be fine. The WEM I converted had a 50+50uF 350V cap and a 16uF 275V cap in the power supply. And they were quite happy for about 30 years!
Also the first Marshall 18W schematic I ever found (perhaps the Pedal Monkey?) had filter caps rated at 350V.
Also the first Marshall 18W schematic I ever found (perhaps the Pedal Monkey?) had filter caps rated at 350V.
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ampkits
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Hi there,
Where r u located Klaus? I'm sure there'll be places you can find what you look for there.
Part of the cool, to me, once you make amps is that, once your friends start begging to help em make one, is that you can nonchalantly drive your friends to these places, greet people there like you know em 20 years, and start ordering from memory.
Better, memorize the part number as well, or where they put the damn things.
Your friends will have new respect for you. Like when you were kids, and you were the only one to know where the peep hole is (or insert whatever in your memory that made you feel so cool when you were 10)
Thanks!
Nik
Where r u located Klaus? I'm sure there'll be places you can find what you look for there.
Part of the cool, to me, once you make amps is that, once your friends start begging to help em make one, is that you can nonchalantly drive your friends to these places, greet people there like you know em 20 years, and start ordering from memory.
Better, memorize the part number as well, or where they put the damn things.
Your friends will have new respect for you. Like when you were kids, and you were the only one to know where the peep hole is (or insert whatever in your memory that made you feel so cool when you were 10)
Thanks!
Nik
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KlausSp
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KlausSp