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21st January 2013, 06:10 AM
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#41 |
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just another
diyAudio Moderator
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I'm not an engineer, but I would like to know how you calculated his input voltage when you do not know the regulation of the transformer or it's va rating
 Tony. |
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21st January 2013, 07:04 AM
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#42 |
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diyAudio Member
Join Date: Jun 2011
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Forget it...
He has 50V capacitors now. With his 50V capacitors he will now survive 357VAC over voltage to his transformer. :-) Which is nice... :-) |
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21st January 2013, 08:00 AM
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#43 | |
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diyAudio Moderator
Join Date: Sep 2007
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Quote:
 but would the caps ?
__________________
------------------------------------------------------- A simulation free zone. Design it, build it, test it. |
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21st January 2013, 08:50 AM
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#44 |
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diyAudio Member
Join Date: Jun 2011
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...And 375V with his amplifier connected...
Which is also - nice... :-) OK, bad joke. Im an evil, evil little man... |
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21st January 2013, 09:13 AM
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#45 |
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diyAudio Member
Join Date: Sep 2010
Location: Melbourne
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The mind boggles how to make mountain out of a mole hill the OP stated the output voltage under the normal running conditions at 35V even in the unlikely event that it was measured at supply -6% the worst case would be supply +10 to get 40.9V well inside the the absolute maximum rating of the capacitor.
While I would have used 50Vdevices because they are common if I had 40V devices on hand I would have used them also. I and I would have done the trivial thing of measuring the mains voltage at which the output voltage was measured which could well have been 240V and saved 5 pages of speculation. |
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21st January 2013, 11:31 AM
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#46 | |
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diyAudio Moderator
Join Date: Nov 2005
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Quote:
 regarding cap lifetime mentioned to might being shortened by the possible small over voltage since he already have them, the weird thing is, his caps would actually last much shorter if put back on the shelf 
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