Need help finding a capacitor

bongoben

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I am looking to rebuild a Sharpshooter (pin) power supply. The big capacitor on the board is listed as 11,000 MFD 25V Lytic Capacitor. I cannot find this on any of the sites I've looked at. Does anyone have a supplier I haven't looked at yet OR is there a range of one of these ratings that I can fudge a bit so it doesn't need to be exactly as listed?

Thanks

(I actually believe I've asked this same question before but absolutely cannot find that thread/PM string)
 
You can fudge a filter cap quite a lot. 11,000uf is really an odd value these days, but 12,000 or even 15,000 should be readily available and will work just fine in that application.

-Ian
 
Two options:

Find two 5500uf caps somewhere and put them in parallel.

Get a 12kuF from BobRob and use that. It's within 10% of the original value...
 
You can fudge a filter cap quite a lot. 11,000uf is really an odd value these days, but 12,000 or even 15,000 should be readily available and will work just fine in that application.

-Ian

Two options:

Find two 5500uf caps somewhere and put them in parallel.

Get a 12kuF from BobRob and use that. It's within 10% of the original value...

This is the rule I can never keep straight in my head. With caps you can fudge the ohm rating as long as the cap you put in is a higher rating than what it's rated for but you need to keep the Volts the same? I know there are probably a million exceptions but in a general sense, in working with arcade pcbs/monitor chassis/etc is this correct?

Great Plains Electronics has lots of pinball electronic parts:

http://www.greatplainselectronics.com/products.asp?cat=108

Thanks Ken. I totally forgot about Great Plains as I've never ordered from them.
 
This is the rule I can never keep straight in my head. With caps you can fudge the ohm rating as long as the cap you put in is a higher rating than what it's rated for but you need to keep the Volts the same? I know there are probably a million exceptions but in a general sense, in working with arcade pcbs/monitor chassis/etc is this correct?

Volts are rated for breakdown and arcing. Higher is acceptable for most all simple devices like resistors and caps.

Just staying higher (ohms/farads) without staying close is not a proper practice for resistors or capacitors, unless it is a non-RC cap like a filter cap used in a power supply. With resistance (ohms) and capacitance (farads), most devices are manufactured with a 5% or 10% tolerance anyway. As long as you stay in this range, you can generally substitute. If your substitution is spec'd at either end of the range, be sure and check that it's tolerance is not also on the same high end of it's spec. I.e. 100 (+/-5%) = 95-105. Don't substitute a 105 (+/-5%) that tests out at 110. However, a 105(+/-5%) that tests out at 103 would be fine.
 
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Volts are rated for breakdown and arcing. Higher is acceptable for most all simple devices like resistors and caps.

Just staying higher (ohms/farads) without staying close is not a proper practice for resistors or capacitors, unless it is a non-RC cap like a filter cap used in a power supply. With resistance (ohms) and capacitance (farads), most devices are manufactured with a 5% or 10% tolerance anyway. As long as you stay in this range, you can generally substitute. If your substitution is spec'd at either end of the range, be sure and check that it's tolerance is not also on the same high end of it's spec. I.e. 100 (+/-5%) = 95-105. Don't substitute a 105 (+/-5%) that tests out at 110. However, a 105(+/-5%) that tests out at 103 would be fine.

Thank you for this.
 
try here.

Not like they used to be but this place will have odd stuff often or older
http://www.orvac.com/
Id suggest calling not trying website their site never been much
I am looking to rebuild a Sharpshooter (pin) power supply. The big capacitor on the board is listed as 11,000 MFD 25V Lytic Capacitor. I cannot find this on any of the sites I've looked at. Does anyone have a supplier I haven't looked at yet OR is there a range of one of these ratings that I can fudge a bit so it doesn't need to be exactly as listed?

Thanks

(I actually believe I've asked this same question before but absolutely cannot find that thread/PM string)
 
Just staying higher (ohms/farads) without staying close is not a proper practice for resistors or capacitors, unless it is a non-RC cap like a filter cap used in a power supply.

Yeah - but when it comes to power supply filters, you can usually go as much as 50% higher in value. Just don't go down in value. The cap in question is a filter. 12,000uf or 15,000uf will work perfectly fine in this application.

But yes, in most circuits, you do NOT want to fudge values beyond the tolerance of the component.

And when it comes to voltage rating, you can always use a higher rated part. The only thing is that with caps, the higher the voltage rating, the larger the part, so a 100v rated cap might not fit where a 25v part was. But, since new caps are so much smaller than their old counterparts, this is rarely an issue.

-Ian
 
You can fudge a filter cap quite a lot. 11,000uf is really an odd value these days, but 12,000 or even 15,000 should be readily available and will work just fine in that application.

-Ian

Just to toss in some confustion factor.
There are several "E" series for capacitor values:
E3 = tens multiples of 10, 22 and 47 (i.e. 1uF, 10uF, 220uF or 4700uF)
E6 = tens multiples of 10, 15, 22, 33, 47, 68 (standard series used for caps)
E12 = tens multiples of 10, 12, 15, 18, 22, 27, 33, 39, 47. 56, 62, 68, 75, 82, 91
E24 = much wider varietity and includes 11 (too lazy to list)
The higher "E" series are typically available but are often not standard values so they typically cost more.

E6 is the standard series used for capacitors so a standard valuein your range would be either 10,000uF or 15,000uF.

12,000uF is the typical capacitor used to replace 11,000uF caps. 12,000's fall into the E12 series - usually special orders and cost more than E6's. Axial 25V is in the $5 range.

11,000uF would fall into the E24 range. It would also be a special order but normally costs even more than the 12,000uF caps. Probably looking at a 25V axial cap that's over $7.

A 12,000uF cap is not cheap... but an 11,000uF cap would still cost you considerably more.

The cap the original poster wants is used on the Williams power supply for main regulator -- anything in the 11,000uF to 15,000uF range will work (like Ian said). 10,000 would probably work just fine as well but as a rule, I don't reduce capacitance value without fully analyzing the circuit (and most of the time, I'm just too lazy to do that).

GPE normally sells 12,000uF and 18,000uF axial capacitors for Williams power supplies but are currently sold out of 12,000uF's. More on order but since they are special orders, they have a long lead time - not due until October.

Ed
 
So much in there that flew right over my head. Regardless, thank you for that Ed. You will be seeing an order soon for the parts for this Sharpshooter power board as well as some resistors for my Pinbot.
 
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