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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 8th Feb 2020, 9:35 pm   #1
Robsradio
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Default Capacitor date code?

Evening
Iím throwing this open to ideas...
I have just bought an old road lamp which was NOS, I believe it to be from the late 80s to early 90s.
The electrolytic capacitor on the lamp flasher circuit has the value and voltage written as usual, and then has 1243 on the other side.
Now if the lamp was newer I would say it means week 43 in 2012, but the lamp predates this?
Itís all original and no parts have been replaced.
Any thoughts please?
Thanks
Rob
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Old 8th Feb 2020, 10:04 pm   #2
Maarten
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Default Re: Capacitor date code?

Either week 12 of 1943 or the other way around ;-)

The coding depends on the brand and even the era and series. Also it could be the series or a batch number instead of a date code. What brand is it and what's the other printing on it? Maybe a picture will help.
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Old 8th Feb 2020, 11:47 pm   #3
Refugee
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Default Re: Capacitor date code?

I would have a good look over the plastic mouldings as these often have date codes on them.
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Old 10th Feb 2020, 9:18 pm   #4
Robsradio
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Default Re: Capacitor date code?

Thanks for your thoughts gents.
It is a bit of a mystery really, sadly the date code ring is there but has not been stamped!
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Old 11th Feb 2020, 3:55 am   #5
Maarten
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Default Re: Capacitor date code?

Date code ring?

Also, other components may also sport date codes.

A few pictures may still help, or if you can't take pictures the brand name, other printing on the capacitor might help.
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Old 11th Feb 2020, 11:14 am   #6
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Default Re: Capacitor date code?

Quote:
Originally Posted by Maarten View Post
Date code ring?

Also, other components may also sport date codes.
What I have seen is a little clock face on the inside of plastic parts with some kind of mark made to indicate a date.
Transistors sometimes have date codes too.
Have a look at all the plastic parts including the bulb holder.
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