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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets.

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Old 29th Nov 2022, 12:05 pm   #1
magiceyeradio
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Default Looking for help with old Philips capacitor values

Hi all. just wondering if anyone can shed light on the value of these 2 old Philips capacitors from 1955. Both are faulty, so unable to read with a cap meter.

capacitor markings:
L47KP6.4
and
L8K2P74
thanks in advance,
Oliver
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Old 29th Nov 2022, 12:18 pm   #2
radiomobile
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Default Re: Looking for help with old Philips capacitor values

47nf (.047uf) and 8.2nf (8200pf)
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Old 29th Nov 2022, 12:55 pm   #3
Jac
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Default Re: Looking for help with old Philips capacitor values

The L stands for 125 V.

Jac
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Old 29th Nov 2022, 1:02 pm   #4
Sideband
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Default Re: Looking for help with old Philips capacitor values

Yes. The L47K part translates to 47,000pF (as above 47nF or .047uF) and the L8K2 part translates (as above 8,200pF, 8n2 or 8.2nF). Not sure what the other numbers relate to but could be construction or tolerance. Standard 400V polyester should be ideal as replacements.


PS thanks Jac....didn't know that!
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Old 29th Nov 2022, 4:36 pm   #5
dazzlevision
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Default Re: Looking for help with old Philips capacitor values

Markings decoder for Philips black wax dipped axial paper capacitors (I copied and pasted this from an earlier Forum post some time ago, as it would be useful):

First Letter: working voltage =

L 125 V
No letter 400 V
H 600 V
S 800 V
T 1000 V

Capacitance value in pF is (i.e. 56K = 56000pF)

Then tolerance code:

A + - 10%
P + - 20%

Example:

A capacitor with the markings: "S 10 CP 5.1" = 10nF at 800V 20% tolerance.

This is followed by a production code (5.1 for example).
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Old 3rd Dec 2022, 3:00 am   #6
Maarten
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Default Re: Looking for help with old Philips capacitor values

Quote:
Originally Posted by Sideband View Post
Yes. The L47K part translates to 47,000pF (as above 47nF or .047uF) and the L8K2 part translates (as above 8,200pF, 8n2 or 8.2nF). Not sure what the other numbers relate to but could be construction or tolerance.
6.4 and 74 are date codes. Month 6 and 7 of 1954 respectively.
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