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 Wima capacitor codes
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 Return to top of page · Post #: 1 · Written at 4:39:01 PM on 25 March 2019.
Tippy's Gravatar
 Location: Mount Cotton, QLD
 Member since 20 February 2018
 Member #: 2214
 Postcount: 125

Hi, I am currently restoring a Kaiser W1838/3D phono radio.

It has a number of Wima brand caps in it and all are leaky. They look like brown bon-bon lollies. I don't have a schematic for that exact model but have one for the W1835 which differs somewhat and can't be relied on for values. I have searched the internet to no avail.

The marking from some are as follows:
5000
500-
30Cs

or
5000
500-
109DP

or
2600pF
500v-
59Ca

The last one has the value on it, 2600pF but the 59Ca doesn't seem to relate to that value. I'm wondering if the 5000 on the top line of the first two is 5000pF, 500V and a tolerance code on the bottom line. That kinda make sense to me

Can someone confirm this?

As usual, Thank you, David


 
 Return to top of page · Post #: 2 · Written at 5:56:06 PM on 25 March 2019.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 3698

I see Radio Museum has no circuit.

https://www.wima.de/en/our-product-range/metallized-capacitors/

http://kaizerpowerelectronics.dk/theory/capacitor-code-table/

This might help but Mouser is one that sells them. The position in the circuit can help.

Not all are created equal: I prefer a pulse grade type on the Vibrator of a power supply.

Marc


 
 Return to top of page · Post #: 3 · Written at 9:36:16 PM on 25 March 2019.
Tippy's Gravatar
 Location: Mount Cotton, QLD
 Member since 20 February 2018
 Member #: 2214
 Postcount: 125

Hi Marc, the sites you suggested didn't help much as they refer to current capacitors not 60 year old ones. I have replaced all of them using the diagram I have, the markings on the caps and an educated best estimation.

It's all working well and voltages and performance are top class.

Interestingly, every one of this type of capacitor was leaking, even low voltage ones, and several had taken resistors out with them. If anyone else finds these fitted they should treat them with extreme distrust.

They are dark brown in colour, appear to be hard plastic and look a similar shape to a slightly flattened, elongated egg.

Cheers, David


 
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