Sorry, I have 50 in stock. Not to mention my other caps.
If the price is right, buy them all. Sell what you don't need and have your own parts for free.
Yes, I am dutch 😉
If the price is right, buy them all. Sell what you don't need and have your own parts for free.
Yes, I am dutch 😉
Hi,
just a small question besides this discussion (and a big HI to JeanPaul!)
I'm planning to build a power supply to feed 3 4th order crossovers. (that means driving 24 single opamps) The idea is to build this powersupply:
http://hitechnetworks.net/bwaldron/audioelectronics/sb1_regulator.htm
Since the standard 4700µF capacitors have a rather large impedance, I planned to replace each 4700µF capacitor (that are C15, C16, C21, C22 in this schematic) with 4 United Chemicon SXE 470µF/50V capacitors in parallel.
The capacitiance is 40% of what the schematic says, but the ESR of those parallel capacitors is WAY lower than with one 4700µF, and the max ripple current is about 2 times as high.
Is this a good idea to do?
Grtz, Joris
P.S. The specs of the 470µF SXE's: 0.068 Ohm maximum impedance at 100kHz (20 degr C.) Maximum ripple current at 100kHz (105degr C.) is 1320mA
just a small question besides this discussion (and a big HI to JeanPaul!)
I'm planning to build a power supply to feed 3 4th order crossovers. (that means driving 24 single opamps) The idea is to build this powersupply:
http://hitechnetworks.net/bwaldron/audioelectronics/sb1_regulator.htm
An externally hosted image should be here but it was not working when we last tested it.
Since the standard 4700µF capacitors have a rather large impedance, I planned to replace each 4700µF capacitor (that are C15, C16, C21, C22 in this schematic) with 4 United Chemicon SXE 470µF/50V capacitors in parallel.
The capacitiance is 40% of what the schematic says, but the ESR of those parallel capacitors is WAY lower than with one 4700µF, and the max ripple current is about 2 times as high.
Is this a good idea to do?
Grtz, Joris
P.S. The specs of the 470µF SXE's: 0.068 Ohm maximum impedance at 100kHz (20 degr C.) Maximum ripple current at 100kHz (105degr C.) is 1320mA
A big HI to you too Joris ! The idea of replacing the 4700 uF caps for 4 x 470 uf just for very low ESR makes not much sense. In ripple calculations the capacitance value is the one you're calculating with unless you're dealing with a switcher.
So you have to know how much current your 24 opamp crossover will draw. Then use the rule of thumb ( or look up the formula if you wish ) that one 2200 uF will suffice for 1A of current draw. Now calculate how many 470 uF SXE you need before the regulators. I am confident 4 x 470 uF will suffice with modern opamps. Nevertheless calculate things. Why not use 8 x 470 uF if you have them ?
But... I wouldn't use low ESR caps *after* the regulators.
BTW we are threadjacking.
Jean-Paul/ who hopes Jan Didden is around for a theoretical backup.
So you have to know how much current your 24 opamp crossover will draw. Then use the rule of thumb ( or look up the formula if you wish ) that one 2200 uF will suffice for 1A of current draw. Now calculate how many 470 uF SXE you need before the regulators. I am confident 4 x 470 uF will suffice with modern opamps. Nevertheless calculate things. Why not use 8 x 470 uF if you have them ?
But... I wouldn't use low ESR caps *after* the regulators.
BTW we are threadjacking.
Jean-Paul/ who hopes Jan Didden is around for a theoretical backup.
fdegrove said:
What does the datasheet say about that?
Not to use a 10nF<cap<1uF ?
Did I understant dut curve correctly?
But I didn't find anything about the cap's ESR
Hi,
Nothing I could find so I think it's safe to assume ESR of CL doesn't affect the shuntreg's performance on paper.
Even upto 10µF can be unstable as shown in fig.15.
Note also that the unsafe area varies with Vref.
Cheers,😉
Nothing I could find so I think it's safe to assume ESR of CL doesn't affect the shuntreg's performance on paper.
Even upto 10µF can be unstable as shown in fig.15.
Note also that the unsafe area varies with Vref.
Cheers,😉
You're right, 10uF 😉
this was a mistype
So Bernahard, how much do you want for some of your oscons?
this was a mistype
So Bernahard, how much do you want for some of your oscons?
Hi Bricolo,
1 EUR for 1 piece ?
I could not find a websit where they sell any.
Seems to be difficult to get that stuff 😕
1 EUR for 1 piece ?
I could not find a websit where they sell any.
Seems to be difficult to get that stuff 😕
I just looked on radiospare's website, how much do the 100uF oscons cost.
Damn! 5 of them cost than my bottles of Bordeaux!
Since those caps seem to be cheaper everywhere else, and that french wine is certainly more expensive abroad... who wants a bottle of Bordeaux? 😀
Damn! 5 of them cost than my bottles of Bordeaux!
Since those caps seem to be cheaper everywhere else, and that french wine is certainly more expensive abroad... who wants a bottle of Bordeaux? 😀
Sorry I can't give a direct link, because when you go th theyr website, you are "logged", your url ends with a session id, and is invalid after some minutes of inactivity. That sux
www.radiospares.fr
on the left menu: "actifs et passifs", then "condensateurs", "aluminium", "polarises", and on the 3rd page you have 3 types of OSCONS.
Tell me what you think of theyr prices
www.radiospares.fr
on the left menu: "actifs et passifs", then "condensateurs", "aluminium", "polarises", and on the 3rd page you have 3 types of OSCONS.
Tell me what you think of theyr prices
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