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Old 3rd March 2006, 09:08 AM   #1
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Default 'lytic and PSUd question

convenient values for resistance in PSUd II for 33.000Uf and 22.000UF?
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Old 3rd March 2006, 09:15 AM   #2
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try 5-10 milliOhm,

William
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Old 3rd March 2006, 09:29 AM   #3
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I presume that
1/(2xPi x 2x50Hz x C)

is best case?

anyway-look:
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Old 3rd March 2006, 11:58 AM   #4
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Hi,

I don´t think you may use that formula to calculate ESR.

Your PSU looks nice but how did you make a 9mH / 0,2 Ohm choke?

9mH seems a bit overdone, normally 2-3mH is OK.

William
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Old 3rd March 2006, 12:10 PM   #5
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Quote:
Originally posted by wuffwaff
Hi,

I don´t think you may use that formula to calculate ESR.

Your PSU looks nice but how did you make a 9mH / 0,2 Ohm choke?

9mH seems a bit overdone, normally 2-3mH is OK.

William

seems that I must look for some datas for ESR....

chokes are from old cinema projector PSU for sound bulbs (lamps)
EI 72 iron, n original PSU worked at 5A

I have exactly two-perfectly adequate for 4A for Babbelfish J
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Old 3rd March 2006, 01:52 PM   #6
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Quote:
Originally posted by choky
I presume that
1/(2xPi x 2x50Hz x C)

is best case?

anyway-look:
At power supply frequency that would be the Capacitive Impedance, Xc, in series with the cap's ESR.
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Old 3rd March 2006, 05:43 PM   #7
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Quote:
Originally posted by Blues


At power supply frequency that would be the Capacitive Impedance, Xc, in series with the cap's ESR.

sounds logical
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