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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Yes. posted by Al Sekela on June 21, 2004 at 15:23:30:
Al,
Thank you very much for your explanations. Let me see if I've got it.The filter capacitance in my tube amp is 693uF (2 330uF in parallel with a 33uF bypass), and the caps are rated at 400V. (I'm going to use the cap rating to be conservative, though I know that the rail voltage is significantly less.) The tolerance of the big caps is 20%, so I'll use 693uF * 1.2 = 832uF, again, to be conservative.
0.000832F * 400V = 0.33 coulomb
I want a safety margin of 2, so 0.33 * 2 = 0.66 coulomb.
2/pi * I(peak) * 1/120 = 0.66 implies that I(peak) = 124.3 amps.
The 8A HEXFRED, with the 130A single pulse rating should do the trick, particularly given the buffers built in to the calculation.
Look right?
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Follow Ups
- I think I've got it...peak current calculation - lrcordell 07:23:30 06/22/04 (1)
- Yes, that looks good. - Al Sekela 11:05:17 06/22/04 (0)
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