Re: is this a good way to use polymer caps?
I think you do know what I mean. Cheers.
In practice, even signal path is 'digital', they can always be distorted in some way. That's why i tried to get the best possible power from my PS....
jackywhatever
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Last Activity: 07-15-2010, 10:32 PM
Joined: 06-22-2010
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Re: is this a good way to use polymer caps?
Hi all, i didn't have time for a bit to bit comparison from different drives. But while playing with the caps and drives I got a pretty nice bonus.
I remember I mentioned the 'crap' Benq drive. It always failed to eject discs while upright. then I found
FSP 350w power with or without extra polymer caps.. still fail
Delta 350w power... fail
same Delta unit with extra polymer caps, it works!
I will disassemble the benq drive and recap it as well. Will post updates.Leave a comment:
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Re: is this a good way to use polymer caps?
Thank you for your input.
I know it's all digital, but I am convinced that different drives gives different sound. (e.g earlier Lite-on gives a kinda dry sound. Benq drives sounds like crap, some Pioneer/asus/plextor sounds better but also different between them...) They also perform in different ways in different computers. Other than power or EMI i can't figure out other reasons. any comment?
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Re: is this a good way to use polymer caps?
is it possible to use a voltage regulator?
how difficult it can be>?Leave a comment:
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Re: is this a good way to use polymer caps?
thank you for your input.
I use the device for retrieving WAV from CDs, where accuracy is important. Fluctuations in voltage will degrade the signals quite badly, and I see this happen in my work. I already recapped my PSU, but with all with same capacitance as it was. so just wondering if there is any better way in getting more stable voltage from a PS.?
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is this a good way to use polymer caps?
I have some unused polymer caps lying around, decided to try them on 4 pin outputs on a PS, parellel to my DVD rom. nothing bad seemed to happen. maybe or not, my digital multmeter shows a kinda more stable voltage.
I am not good at physics. Is this a good idea at the first place? Can anybody comment on this?
If I am interested in giving better power to my DVD rom, should connect the caps parellel or in series to the device?...Last edited by jackywhatever; 07-01-2010, 12:18 AM. -
Re: Should I recap this unit?? FSP 350w
before recap the 12v rail didn't go up and down that much
Is it because of the voltage now sit right between 11.79/11.8 or because I am getting more ripple by now?...Leave a comment:
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Re: Should I recap this unit?? FSP 350w
Hi I would like to post another question:
I recapped another unit (the FSP was in use so I turned to a Delta 350W APFC unit)
Most output caps were Ltec and replaced with Samxon with all same capacitance and voltage, not most are high temp/long life capacitors, due to limited availability
450v 220u Samxon LP ------ left as it
35v 220u some cheap capacitor, can't recognize --> Samxon GT high temp/long life
25v 470u some cheap capacitor, can't recognize --> NCC LXG high temp/long...Leave a comment:
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Re: Should I recap this unit?? FSP 350w
is it a nice idea to increase capacitance on the output side of the PS? google did not give me a definite answer.
my understanding so far is,
1. increasing capacitance will help with ripple, but decreasing the speed of a cycle. does that matter at all in a PS?
2. increaseing capacitance may induce more instantaneous load to the PS. due to higher surge at startup. Is that true and how bad it is?
2. let's say a PS is fine on ripple, but constantly giving lower/higher than desired voltages....Leave a comment:
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Re: Should I recap this unit?? FSP 350w
Do you mean the 200v+ ones?
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Re: Going to all polymer from electrolyte -> only ESR and ripple important?
thank you for your input.
after a lot of googling i came across two forum posts elsewhere:
[url]http://www.capsmod.net/forum/viewthread.php?tid=322[/url] - can a polymer solid capacitor recapped with aluminium electrolytic capacitor
[url]http://capsmod.net/forum/viewthread.php?tid=93&extra=page%3D1[/url] - When do you use OSCON caps?
Conclusion is: on a Motherboard use polymer caps only for those right next to the CPU, and only if the board is designed...Leave a comment:
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Going to all polymer from electrolyte -> only ESR and ripple important?
Hi just a newbie question here,
I have a mother board with most caps around the CPU blown.
They are 6.3v 3300u and 6.3v 1200u.
Can I replace them with Polymer caps of same voltage but with much less uF, as long as they have lower ESR and higher ripple?
cause I am seeing a 6.3v 680u Polymer cap having lower ESR and higher ripple than a electrolyte 6.3v 3300u counterpart. Is this normal and is the polymer cap a good replacement?
e.g
6.3v 3300u... 0.012 ohm, ripple 2800mA
6.3v 680u.. (polymer) ... 0.007ohm,... -
Re: Should I recap this unit?? FSP 350w
it says only ATX350F on its case, it's a fairly aged unit
thank you for your input.
I have two other PS units that runs quite hot and over-voltage (e.g 12V at 12.3V)
Should I replace all of these caps to new same value caps or I should go for larger uf?
200v 820u x2
16v 2200
16v 470 x2
10v 2200 x3
6.3 4700 x2
all Su'sscon (spelling maybe off)
In a PS, should I go for longer life...Last edited by jackywhatever; 06-22-2010, 10:32 PM.Leave a comment:
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Re: Should I recap this unit?? FSP 350w
argh... thanks for reminding
just wondering, per my limited knowledge on caps, those caps used to smooth output current are mostly over 1000uf. what do the smaller caps do (those under 100uf)? for control circuits?...Leave a comment:
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Re: Should I recap this unit?? FSP 350w
thank you, it sounds like I can live with it for many more years, which is great
I even tried to touch the small-ish heatsink inside the PS after having the computer on for a day. Still cool and safe to touch
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Re: Should I recap this unit?? FSP 350w
Thank you for your input.
Will changing caps end up giving
1. more stable voltage (minimizing spikes) or
2. make the PS run at lower temperature?
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Should I recap this unit?? FSP 350w
I would like to recap this power supply as I use this on a computer for music reproduction.
How would you rate this PS at the first place?
Should I change some or all of these caps?
OST 200v 470u x2
OST 16v 3300u
Teapo 10v 2200u x5
Teapo 10v 1000u
some more but all under 100u, mostly teapo as well
By the way all of these caps are not very good... surprisingly though the PS runs very cool, um...
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