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Old 20th March 2012, 02:22 PM   #21
gadut is offline gadut  Indonesia
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Quote:
Originally Posted by AndrewT View Post
24 off 15mF for two channels could be arranged

CRCLCCCC per channel per rail
haha..should I use 2.2mH? more cost for extra caps already paid so much for those 12 caps..24 caps will kill my pocket

got these caps with lower price in local store, around $16.5/pcs
2 X NICHICON KG GOLD TUNE 15000uF 63VDC CAPACITOR!

Last edited by gadut; 20th March 2012 at 02:27 PM.
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Old 20th March 2012, 02:26 PM   #22
a.wayne is offline a.wayne  United States
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24 off 15mF for two channels could be arranged

CRCLCCCC per channel per rail
Why so many caps, why not 12 of 30mf and what size inductor ...?
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Old 20th March 2012, 03:02 PM   #23
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Originally Posted by AudioSan View Post
it's not double current. more like 30% rise.
ripple is 3.59A eatch cap.
It is the rippel voltage on the output of the powersupply he is concerned about. If you download PSUD2 you can model the rippelvoltage and see what happends when the current draw rises.
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Old 20th March 2012, 03:36 PM   #24
AndrewT is offline AndrewT  Scotland
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Originally Posted by gadut View Post
nice build, can't wait to start mine anyway which one is better configuration, CCCC R CC or CC R CCCC ? but it's for my aleph30 with 2pcs talema 2x18V 225VA and 12pcs 15.000uF, so each channel will be supplied by 90.000uF which already exceeds aleph30 design which is 60.000uF per channel
Because I read this to mean he proposes to use 12 off 15mF per channel.
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Old 20th March 2012, 03:38 PM   #25
AndrewT is offline AndrewT  Scotland
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Why 2m2H?
what's wrong with the same wire resistance as that first R, try 0r2.
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Old 20th March 2012, 03:53 PM   #26
gadut is offline gadut  Indonesia
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Quote:
Originally Posted by AndrewT View Post
Because I read this to mean he proposes to use 12 off 15mF per channel.
Quote:
Originally Posted by AndrewT View Post
Why 2m2H?
what's wrong with the same wire resistance as that first R, try 0r2.
I proposed to use 12 off 15mF for both channel

I'm using 3x0R3 5W parallel to get 0R1 15W for each R series, and I find that common CLC aleph psu design in kk-pcb use 1.8-2.7mH. so what's your suggestion on L value?
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Old 20th March 2012, 04:08 PM   #27
AndrewT is offline AndrewT  Scotland
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9m of 1.4mm diam copper gives ~0r1 and when wound 8T/Layer and 9Layers (75.8T) on a 27mm diam spool results in ~0.2mH

Total heat in that coil would be ~300mW @ 1.7Adc

so back to Jacco's suggestion
CRCC or CLCC
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