low CAp Values on P.S. HI-voltage?

swanny50 · 10th April 2012, 12:01 AM

Just wondering if its safe to change out the Fiter caps on the Power supply for more uF's. On my Sony cdp-s7700 It has two 250v 560uf slimics in parralel so hardly nothing but Voltage. wondering if i should add some UF ? i Got some 2200uf 63v nichicon Fw's, I didin't know if the voltage was the safer way to go. it seems every P.S. i look at is the same Low capacitance, High Voltage? is this good ? It seems they all lack transfrormer so I thought they were getting an over rated Capacitor to deal with the Voltage, they all seem to be set up with a weak inductor,then some box Y-type capactiors I don't know the name,they always look look like a relay to me. So is there any problem adding More Uf's to the supply filtering? The sony's got two power supply. Best i've delt with, ones a U core!

AndrewT · 10th April 2012, 09:48 AM

250V (ac or dc), 560uF is a big capacitor.

Are you sure you have read and typed the values correctly?

gmphadte · 10th April 2012, 10:38 AM

Looks like it is an smps. Beware

Gajanan Phadte

DF96 · 11th April 2012, 11:02 AM

Strange as it might seem, power supplies have to be designed. Some circuits can cope with extra capacitance being simply slapped on, some cannot. Even when the circuit can cope, extra capacitance may or may not improve things.

swanny50 · 12th April 2012, 12:53 AM

So should i Just leave it alone I was slaping on a Elna 10,000uf in place of one of them. So is there a need for theser to be high voltage caps, is this better than the Opposite way of Lager Capacitance, lower voltage. This is the powee suppy using the R-core transformer, the other P.S. is a switchig, It has two indivdual supplys, that split from the A/C input. I mean on my outboard dac. I got a 63v 2,200uf on each line off of an R-core for a total of three. I just want it right. Thanks for any suggestions.

godfrey · 12th April 2012, 01:05 AM

Quote:

Originally Posted by swanny50

So should i Just leave it alone

Yes!!! You're heading for a Darwin award here.

I wouldn't want to be in the same room as you if you swap a 250V capacitor for a 63V electrolytic. Actually I wouldn't even want to be in the same house.

AndrewT · 12th April 2012, 09:47 AM

Some folk know so little, that they cannot recognise when or if they put themselves in danger.

DF96 · 12th April 2012, 09:57 AM

Ah, the bliss of ignorance!!

AndrewT · 12th April 2012, 09:59 AM

The bliss of recognising our limitations. That way we survive.

Simon B · 13th April 2012, 10:44 AM

Quote:

Originally Posted by DF96

Ah, the bliss of ignorance!!

More like the blisters of ignorance.

At the very least.

Here in the UK, we mostly let off fireworks on November the 5th........

10th April 2012, 12:01 AM	#1
swanny50 diyAudio Member Join Date: Mar 2011	low CAp Values on P.S. HI-voltage? Just wondering if its safe to change out the Fiter caps on the Power supply for more uF's. On my Sony cdp-s7700 It has two 250v 560uf slimics in parralel so hardly nothing but Voltage. wondering if i should add some UF ? i Got some 2200uf 63v nichicon Fw's, I didin't know if the voltage was the safer way to go. it seems every P.S. i look at is the same Low capacitance, High Voltage? is this good ? It seems they all lack transfrormer so I thought they were getting an over rated Capacitor to deal with the Voltage, they all seem to be set up with a weak inductor,then some box Y-type capactiors I don't know the name,they always look look like a relay to me. So is there any problem adding More Uf's to the supply filtering? The sony's got two power supply. Best i've delt with, ones a U core! __________________ ACURUSA100,Parasound Ph/P-850, Seas SR-71's, Cd/trans- Pioneer DV-47ai, Minni24/96 DAC. WIRE-MIT-Termntr2, A/Q B/mambaII,Pangea 9G+14Gse,Panamax-P/C

12th April 2012, 12:53 AM	#5
swanny50 diyAudio Member Join Date: Mar 2011	So should i Just leave it alone I was slaping on a Elna 10,000uf in place of one of them. So is there a need for theser to be high voltage caps, is this better than the Opposite way of Lager Capacitance, lower voltage. This is the powee suppy using the R-core transformer, the other P.S. is a switchig, It has two indivdual supplys, that split from the A/C input. I mean on my outboard dac. I got a 63v 2,200uf on each line off of an R-core for a total of three. I just want it right. Thanks for any suggestions. __________________ ACURUSA100,Parasound Ph/P-850, Seas SR-71's, Cd/trans- Pioneer DV-47ai, Minni24/96 DAC. WIRE-MIT-Termntr2, A/Q B/mambaII,Pangea 9G+14Gse,Panamax-P/C

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10th April 2012, 09:48 AM	#2
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	250V (ac or dc), 560uF is a big capacitor. Are you sure you have read and typed the values correctly?

10th April 2012, 10:38 AM	#3
gmphadte diyAudio Member Join Date: Jul 2003 Location: Dona paula, Goa	Looks like it is an smps. Beware Gajanan Phadte

11th April 2012, 11:02 AM	#4
DF96 diyAudio Member Join Date: May 2007	Strange as it might seem, power supplies have to be designed. Some circuits can cope with extra capacitance being simply slapped on, some cannot. Even when the circuit can cope, extra capacitance may or may not improve things.

12th April 2012, 09:47 AM	#7
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Some folk know so little, that they cannot recognise when or if they put themselves in danger.

12th April 2012, 09:57 AM	#8
DF96 diyAudio Member Join Date: May 2007	Ah, the bliss of ignorance!!

12th April 2012, 09:59 AM	#9
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	The bliss of recognising our limitations. That way we survive.