Capacitor help

Thread Starter

Xqizit

Joined May 9, 2015
3
Hi,

My old super 8mm projector blew a capacitor and I am struggling to find the right replacement.
The projector is a Yashica 8PC-N and is about 35 years old.

When it blew it had aluminium foil type material coming out of it.

I was wondering if you could help me.

It is marked as follows:

OIL
CP-C
.1uF
(M)
400WV

Does the WV mean working voltage or "Watt Volts"?
Does the CP-C mean anything?


What type of capacitor is this? crossover? electrolyte? both?

The second attachment is a photo of another capacitor which looks to be the same type but probably a different brand.

I have gone to my local electronics shop but was unable to find a suitable replacement.

Does the volt rating have to be exactly the same or can i just get one which is greater e.g. 600V

Any help you can give is very much appreciated.

Thanks
Joe

IMG_4097.JPG IMG_4098.JPG
 

Dodgydave

Joined Jun 22, 2012
11,284
looks like a 100nF (0.1uF) 400V cap, oil wound type for AC use, get one with the same voltage or higher.
 
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AnalogKid

Joined Aug 1, 2013
10,986
And there probably is no reason to go with an oil type. A 0.1 uF film type (polyester, metalized mylar, etc.) with the same voltage rating will work, and probably last longer.

ak
 

ian field

Joined Oct 27, 2012
6,536
looks like a 100nF (0.1uF) 400V cap, oil wound type for AC use, get one with the same voltage or higher.
IIRC: those ones were oil filled paper dielectric - pretty sure they didn't bother with things like X-class mains filter ratings that long ago.

The original 400V rating is cutting it a bit fine, the peak value of 230VAC is in the vicinity of 320V - then there's any spikes/noise etc on top of that.

For a bodge - use at least 600V rating. Or better; a 275VAC mains filter cap.
 

ian field

Joined Oct 27, 2012
6,536
A WIMA MKP4 .1υf 400vw would be a replacement, probabally superior to the original.
Max.
If its a mains filter - use at least 600V rating for 230VAC, and that's a bodge!

It certainly looks like what they used to use for mains filters back in the day - if so; it should be replaced with a part that conforms to present day mains filter cap regulations.
 

ian field

Joined Oct 27, 2012
6,536
Thanks for all your help everyone.

I bought this one. I hope it's the right one.

View attachment 85569
If its a mains filter cap for 230V - I'm guessing that will probably go bang a fair bit quicker than the one that's been there 35 years.

It needs to be the correct type of mains filter capacitor with the X2 specification marking.

Rather than buying another to get the right sort - anything recently manufactured that has an SMPSU will have filter capacitors you can salvage - an old ATX PC PSU would be a good candidate, the ones in set top boxes tend to be less than 104, but you could still parallel to make up the value.
 
I have a similar capacitor problem from a Sekonic 80p. Does anyone know how to describe this / find it on the Net? I think this is what's written on it ".02+.001X2μF"
image.jpg
 

ian field

Joined Oct 27, 2012
6,536
I have a similar capacitor problem from a Sekonic 80p. Does anyone know how to describe this / find it on the Net? I think this is what's written on it ".02+.001X2μF"
View attachment 86490
Does it have 3 wires? - If so its almost certainly a mains filter containing a pair of capacitors.

Shouldn't be any problem using individual capacitors, but they must be the X2 grade specified in the regs for present day mains filters.
 

MaxHeadRoom

Joined Jul 18, 2013
28,617
I believe that indicates .001μf x2
Generally the case is a ground/common and each capacitor is one of the leads on each end to case.
Max.
 

ian field

Joined Oct 27, 2012
6,536
I believe that indicates .001μf x2
Generally the case is a ground/common and each capacitor is one of the leads on each end to case.
Max.
I've seen various configurations - some have 2 leads at one end and only one at the other. If the case is the earth connection, there's invariably a solder tag attached - can't ever remember seeing one that relied entirely on clamping to the chassis for the earth. Although a few equipment manufacturers didn't bother soldering a wire to the solder tag
 

ian field

Joined Oct 27, 2012
6,536
The one in the pic appears to have a screw/Gnd tab attached and a lead at each end. Ceramic insulation.
Max.
Looks like button style terminals with soldered in wires to me, there appears to be the remains of a broken off wire at the obscured far end, and it looks painted judging by the chipped areas, and its not a good shape for chassis clamping/earthing anyway.
 
I've seen various configurations - some have 2 leads at one end and only one at the other. If the case is the earth connection, there's invariably a solder tag attached - can't ever remember seeing one that relied entirely on clamping to the chassis for the earth. Although a few equipment manufacturers didn't bother soldering a wire to the solder tag
Thanks for all the feedback.
Yes. The point where I'm holding it with the pliers was grounded to the chassis and then there was one wire from each end.
 
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