Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: joesatch on August 18, 2024, 08:19:24 am
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can a 50 + 50uf cap can have the two sections wired in series? i'm guessing no since they share the same ground. So when folks tie the two + leads together they are paralleling the two sections to get double capacitance with the same voltage?
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No is correct
"caps in parallel are like resistors in series"
so double the capacitance (think cap plate surface area)
Needs a double-check but think; "voltage is halved"
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oops, never mind! deleted.
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well imma cut open this cap can in the hopes there are two smaller caps inside i can pull out and wire in series.
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what's your end-game? Higher voltage rating?
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Vintage can caps are layers of various materials rolled into a cylinder, impregnated with electrolytic material, then stuffed in a can and sealed up, not just a couple smaller caps stuffed in the can. Some newer vintage-style replacements might be that way, though.
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what's your end-game? Higher voltage rating?
Just add a 2nd cap in series. A 100-220μF at 160v is relatively small. Add appropriate totem pole resistors to ensure voltage rating isn't exceeded. Take a look at the reservoir cap on the Deluxe Reverb reissue schematic.
No need to cut a cap open.
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https://www.nmr.mgh.harvard.edu/~reese/electrolytics/ (https://www.nmr.mgh.harvard.edu/~reese/electrolytics/)
https://www.instructables.com/Tube-Radio-Capacitor-Can-Replacement/ (https://www.instructables.com/Tube-Radio-Capacitor-Can-Replacement/)
Franco