Have you looked at the EZ81 spec sheet and understood it?
Craig
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Date 04/04/2025 17:24:37
Subject [duncanampspsud] EZ81 - series resistor - first cap in CLCLC filters
Dear All
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I'm going to do my first PSU... tnx for this amazing tool that is PSUD. I am implementing a PSU for an high quality line stage. The load on the PSU will not be more than 40ma and the final B+ should be about 250V. I have several EZ81 around, so that will me my rectifier. The PSU will be a CLCLC. I hope somebody can help with this:
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1. I read that it's better to put a resistor in series with the EZ81 between the secondary and the tube, what do you think? Any experience with that?
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2.? I was told that it's best to have the first cap really small, something below 15uF. I saw cases where people use a first cap of 47uF and cases where people use 1uF... what's the sonic difference?? I tried to simulate both, of course I get different ripple and mostly different rise time.?
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I'm interested in sound, do these choice impact sound significantly??
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I hope somebody is willing to help
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Best Wishes to all
Pierre
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