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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: 100uF/370VAC motor run oil - VDC? posted by fred76 on December 13, 2005 at 03:38:11:
Hi.Its mathematical equivalence= VAC x square root of 2
So, 370VAC = 370Vx1.4142135=523.26VDCAgain this is only theoretical equivalentce & whether the motor-run cap can actually handle this VDC also depends on how conservative is the rating & the loading.
Overdosing a cap with HV & high temperature will surely shorten ite service life. Some caps got its expected lifespan in hours for AC/DC voltages excessive of their rated voltage stipulated on the can. The oil caps I am using got such stipulations on them.
Like I am using for years the same Italian made washer motor-run oil caps (for their good sonics), bulky like the image you posted, rated only for 275VAC. But they are working fine up to 415VDC in my situation. The 'safety' measure I've installed is simply adding a fuse at the terminal of the cap receiving the HVDC.
So far so good. Of course I trial-tested them with a dummy resistance load equal to the total load of the amp before I actually installed them in-situ.
Good listening
cheap-Jack
Dec 12, 2005.
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Follow Ups
- We've discussed this before..... - cheap-Jack 07:45:30 12/13/05 (0)
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