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on some of the s111 board layout and pics there is a giant cap/resistor on the right hand side of the board with the markings 'etr met 105k 630v' what is it and why is it only on some of the boards?

it's a 1uf 630v cap

check here for more on reading caps: http://www.wescomponents.com/capacitor/

105k meaning 10 with a multiplier of 100,000 with the k representing 10%+- tolerances.

the first two digits times the third (5 representing the number of zero's; hence 100,000.

Edit - From what i have seen this is typically a 684k cap (68 times 10,000 = .68uf.) On the layout Stephen has a .62uf cap. Perhaps he just uses what he can get his hands on?

Edit 2 - After more research I have found that the higher that value on the cap the fatter the tone ofthe TMB channel. On the mods list Stephen says that if you want to try for a fatter sound you can try a 2.2uf in there.

thank you very much. now it make sense why some pics have it and some dont. sure is a big component.

Schematics / layout use 0.68uf or 684K (K is the tolerance).

viewtopic.php?t=689

It is fat because it's a Metalized Polyester Film cap, not a polarized electrolytic.


Here's a value chart you might find useful:

http://www.sozoamplification.com/chart.html

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Stephen
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