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In Reply to: Re: Fisher X101B blowing the 5AR4 rectifier posted by Michael Samra on February 6, 2007 at 16:32:14:
Michael,Thanks a bunch. As for replacement capacitors, am I going to use a single capacitor that would be the same value as the three old ones added up? Or would I use three seperate capacitors? Would the new ones fit in the old case or would the new ones just be sticking out? Do you have an email addy?
All the best,
Follow Ups:
The multi-section can is equivalent to several individual capacitors with all their negative leads tied together- the can shell is that Common negative terminal & each termial is a positive one. There will be half-moon, square, triangle etc. shapes next to the labled values on outer shell & likewise in the bottom wafer to I.D. which terminal is what value. The values marked on the can shell are for each section within it, they do not sum. Some modern-made Twist-loc cans are now being mfg, but not all past values are currently available, so yes replacment with individual capacitors is not only OK but sometimes the only option (and always the least expensive). The old case will be messy inside as these used an acidic electro-chemical dialectric just like an old flashlight battery. Some creative mounting of new individual capacitors may be necessary. A toilet paper tube painted black & slipped over a bundle of individual caps mimics old styles if you are a stickler for appearance.
Haha, ok it all is starting to make sense now. New capacitors with a common groud inserted into a painted toilet tube so it looks halfway decent.
Sure, if you need to mount them on top of the chassis like the can was. But since modern electrolitic construction has miniaturized somewhat from the past, new individual replacements may fit underneath the chassis. In that case, simply cover the hole via a piece of metal, etc. BTW, bothering to cut/glue a slightly recessed cardboard end cap for the TP tube cover improves appearance & really does mimic some kinds of Vintage multi-section capacitors. There is no electrocution hazard via the twisted Common negative leads as these are same electrical potential as the Can shell & chassis. Be sure to re-establish a chassis to circut Common connection if the original Can shell were direct-mounted (& thus connected) to the chassis.
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