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Need replacement cap

Rockmore

Rockmore

Active Member
Banned
Ski trip canceled- decided to work some more on my great SX-525.

Need better radial replacement for the largest cap and a source for actually obtaining it-

63v 3300uf. Stock cap is 2.75"h x about an inch and a quarter in diameter. HUGE. (Elna CE-W 63v 3300uf black-Neg). It's the polarized version with the two large terminal posts per side.

Not worried about the replacement size so much, can always mod. But can't seem to find a suitable high quality replacement that's not sooo small physically.
 
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If those are the filter caps you can do a few things to get bigger replacements. The voltage rating can safely be raised, to say... 100 volts. Also within reason you could also increase capacitance, maybe to 6800uf.
 
Sir.Byrd said:
If those are the filter caps you can do a few things to get bigger replacements. The voltage rating can safely be raised, to say... 100 volts. Also within reason you could also increase capacitance, maybe to 6800uf.
Click to expand...

That's the stock filter cap value on the sx-727:yes:, it's the big brother to the 525.

I think it's easier to get smaller caps and fit them. Re-capping my sx-727 found out the filter cap replacement went from 1.5" dia. to 1" diameter, a third off...all because modern caps are smaller. I will say that the elna caps seem quite large, even for their value. Mouser or Digikey would be the best bet. As for brand, nippon and the like are as well as anything...just don't go insanely cheap and pick up knock-off caps. Panasonic is a good choice. You maybe able to find a different cap from one of the many parts dealers that stock whatever comes into their door, like Bgmicro or all electronics :dunno:, its all luck with them.

Hope you can find one to suit it, those filter caps have been working at it for 37 years now...
 
Been trying to follow your sx-727 thread 33 1/3rd: Mouser and Digikey BOTH could not recommend a decent replacement; as in any 63v 3300uf of any physical size. Spoke to both places twice so far voice... Might just have to go with a standard one with the same ratings, but since it's so large thought there might be something unique or different about it. A little afraid to just replace it with something with the same ratings.

Cant seem to find any specific info on it...

I realize the size issue and they would be smaller now.

Ive got all my other Nichison KZ series ordered for the PS board and working on my amp board now. Mark(thefixer) said he wont touch this subject of this huge cap and it's left to others.

So.. something must be unique about it.. and dont know if a better replacement is out there.

Ive seen these 37+ year old caps on Ebay.... and youre right they are old (and need to be replaced) regardless of size.

My other two huge ones @2200uf and this single 3300uf are all held by their own mounting bracket. Very big radials if thats what they are- this one had the huge terminal posts with two per side, polarized.

so....
 
Rockmore said:
Been trying to follow your sx-727 thread 33 1/3rd: Mouser and Digikey BOTH could not recommend a decent replacement; as in any 63v 3300uf of any physical size. Spoke to both places twice so far voice... Might just have to go with a standard one with the same ratings, but since it's so large thought there might be something unique or different about it. A little afraid to just replace it with something with the same ratings.
Click to expand...

I don't think there's any major difference. Maybe it had better ratings or something. The reason they are wide (I belive) is because they are pretty short, only around an inch I think. Unfortunately, to get a direct drop-in you'd have to seek out some odd caps, as the market doesn't favor large components except for specialty products.

Ive got all my other Nichison KZ series ordered for the PS board and working on my amp board now. Mark(thefixer) said he wont touch this subject of this huge cap and it's left to others.

So.. something must be unique about it.. and dont know if a better replacement is out there.
Click to expand...

Maybe, maybe not. If it's just a filter cap, buying some extremely esoteric cap won't do much more than a regular one would. Increasing the value may help, as well as make it easier to find a more correct size. There is a limit to the value increase...although I don't know how to determine that (wish I did). I think the brackets would support smaller caps, or you could make a small ring for them. the leads are the same as the terminal, just for smaller sized caps, though, they seem to be a little harder to work on, as well as not being too convienant. I wish there were an easier way to get a "correct" cap.

Ive seen these 37+ year old caps on Ebay.... and youre right they are old (and need to be replaced) regardless of size.
Click to expand...

Yeah, I have one from a dismantled sx-1000TD that's around 40 years old, it still reads above value, which implies its useable, but I don't think I would. I really don't get how a NOS cap could sell :dunno:.


I'll keep looking around, but the market has really dropped the overly-large cap. I don't think there is something too particular about the cap, but i'm no expert...and the size is really large for the value, maybe even for the time...especially with the relativly low voltage rating:scratch2: I may try to find some, but all I can think of are "computer grade" caps which tend to be larger.
 
Probably not, since there aren't a lot of guys going to the trouble to repair/restore SX-525's.

No matter.

The 525 uses a single supply cap, since it is using a fairly simple cap-coupled output stage. The supply voltage is somewhere around 50V, so the 63V rating of the cap is ideal. But before a replacement is picked, we have to know the diameter of the original, in millimeters. You say 'about an inch and a quarter', which is 32mm. That doesn't jibe with standard diameters, which are 22mm, 25mm, 30mm, 35mm, 40mm, 50mm, 63mm, and 76mm. Figure out what the diameter of your cap is, and it'll be a lot easier to make a recommendation.
 
I have recently replaced the large caps on two receivers. I couldn't find the right sizes except in snap on caps. The sansui 9090, I used one that was the same diameter but 1" shorter. The sx 1010 I found a panasonic 1/8" smaller in diameter but 1/8" taller. Both were bumped up to 100 volts. Both had one extra unused lead that I cut off. The 9090 had 3 leads, the 1010 had five leads. The original sansui caps had two leads and the original 1010 had four leads. So it worked out pretty good. I found both on Digikey, but they weren't cheap. About 15 dollars a piece. They were the closest I could find to the originals.

Regards. Ron.
 
Pic is not mine- just attaching for reference.

Not worried about the replacement size so much, can always mod. Something close would be good though, and a high quality cap.

It's 70mmH x (about) 39mm in diameter.
I stated the 4 post terminal for reference.
Don't really need them.

Echowars- when you say "we", who is we?

rhomanski- can you remember or state exactly
the one or ones you obtained and used? Digikey's were
all snap-ins.. but... who know what their tech were talking about sometimes...

(Be nice if Nichicon made these in a large size with the KZ series!! But they dont).
 

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40mm diameter is the kiss 'O death. Nearly nothing in this size until you get to 15,000µf and bigger.

I'd go with a 35mm cap and tape the bottom up so the clamp will work. It'll also have to be a snap-in cap, so soldering the wires on will be a pain (but you can get some tiny ring terminals from Digikey and crimp & solder them to the snap-in terminals to make things easier).

I'd go with a 6800µf 63V Panasonic from Digikey. PN. P7490-ND
Echowars- when you say "we", who is we?
Click to expand...
Got a mouse in me pocket.
 
EchoWars said:
Probably not, since there aren't a lot of guys going to the trouble to repair/restore SX-525's.
Click to expand...

:sigh:, really?...

EchoWars said:
I'd go with a 35mm cap and tape the bottom up so the clamp will work. It'll also have to be a snap-in cap, so soldering the wires on will be a pain (but you can get some tiny ring terminals from Digikey and crimp & solder them to the snap-in terminals to make things easier).
Click to expand...

Out of curiousity, could you use a strip of foam or such material around the capacitor? like the black non-conductive stuff that chips come on...And the ring terminals is a great idea:yes: I may do it on my 727.
 
I used panny's THA 100WV 18000uf. Don't remember the part number but they were in the snap in section on digikey. They are the same capacitance as originals but I went from 63 volts to 100 volts and they came out almost the same exact size as originals. From the top the only difference is they are a deep blue and negative is marked where original elna's were solid black with no marking for neg on can side. This is for the 1010, the 9090 is closed up and I don't remember right off hand.

Regards. Ron.
 
When you say "chips" I assume you mean integrated circuits (ICs)... The foam they are typically supplied on IS conductive to prevent static damage.

Others have used self adhesive wheather stripping to pad the caps up to size.
 
At 3300uf and 100 volt the closest I see is part number p6810-nd. It's a panasonic snap in and 35mm x 40mm. It has two pins. If you go up a little bit in capacitance you can probably find one in 40mm. Check with ew though to see if you can, he knows a lot more about it than I do.
 
xlbee said:
When you say "chips" I assume you mean integrated circuits (ICs)... The foam they are typically supplied on IS conductive to prevent static damage.

Others have used self adhesive wheather stripping to pad the caps up to size.
Click to expand...

And again, the quote "Better to remain silent and be thought a fool than to speak out and remove all doubt" is proven :D.

Yeah, I meant IC's...and no, I wasn't thinking...The weather stripping is a great idea, especially with the adhesive:yes:.
 
There we go fellas!

I assumed a lot of that but wanted to check and re-check
just in case Hands on always beats assuming...

..and never using a snap-in before, just wanted to make sure there was anything different about them for specs. I WANTED to use ring terminals anyway for convenience soldering the wire back on, and already have some good material to still use the stock clamp.

Thanks you all- hope this thread helps others in the future as these old huge caps seem to be common in vintage Pioneers.
 
33&athird said:
:sigh:, really?...
Click to expand...
There probably aren't that many of them around anymore. And, it wasn't exactly Pioneer's TOTL. But if you like it, damn the torpedoes.
Out of curiousity, could you use a strip of foam or such material around the capacitor? like the black non-conductive stuff that chips come on...And the ring terminals is a great idea:yes: I may do it on my 727.
Click to expand...
Need something incompressible for the clamp to hold it tight. And Digikey sells some uninsulated ring terminals with very small holes to use as a connection point on snap-in caps. If there's only a couple of wires per terminal, the A28261-ND (16-22 AWG with #1 hole) will be good. If there's more than three wires on the terminal, then the A28265-ND (16-22AWG with #4 hole) ought to be fine. Crimp the terminal onto the snap-in lead, and solder it there. Now you have a solid place to connect the wires.
rhomanski said:
At 3300uf and 100 volt the closest I see is part number p6810-nd. It's a panasonic snap in and 35mm x 40mm. It has two pins. If you go up a little bit in capacitance you can probably find one in 40mm. Check with ew though to see if you can, he knows a lot more about it than I do.
Click to expand...
There's an 8200µf 100V cap (#P10039-ND) that is 40mm in diameter. But the voltage on the cap will be only about 1/2 of its rated 100V. For longevity's sake and best operation, a power supply cap should have between 65 and 90% of its rated voltage on it. At the 80V level, there's a 10,000µf cap, which I think is too large. The ideal voltage cap will still be 63V, but the smallest 40mm cap is 15,000µf. Too big.
 
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