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I have a 40/40uf electrolytic can cap, Can I use this , and what should I do with the unused 40uf's ?
Asked by Anonymous on March 4th, 2016.
You can just leave the unused sections as they are and use the two sections if you'd like. You can also go the route of using two single section caps and leaving the bad can in there for aesthetic purposes.
I am restoring a 1948 Stewart Warner table radio. I've "re-caped" several antique radios before but never had to replace a multi-cap can before. The unit is 20-40 uf. To save costs I would like to use a 22 and 47 uf axial caps. My question is: are the two (one each for each cap) connector tabs on the cap can the ground? This radio has a jumper wire from that connector to the terminal on the on/off switch opposite the terminal that the power cord connects to. I can see how these connections could look a little unorthadox, but electrically, is my theory sound? Thank you for your time and help. Kenon ([email protected])
It is hard to say that this will work. Yet, as long as you understand that the negative lead on a axial cap is ground and the metal cap of a can cap is the ground, then I think you are on the right track.
How can these multi-section can capacitors be reliable with a tolerance of +50%. Meaning if I bought a a 30/30 uf 450V these cap's could actually measure 45uf. Please explain.
Asked by Anonymous on March 9th, 2016.
Electrolytics can have a fairly wide tolerance especially with this vintage type of can cap. I spoke to manufacturing and was informed that these are made to the exact specs of the Mallory can caps on Mallory equipment so they will reflect the same tolerances as the original. The capacitance has a higher plus tolerance but you will notice the minus tolerance is much tighter. With that said I was informed that you should never see anything as high as +50% with the average being around 2-3mf over as our manufacturing methods are actually tighter than the originals.