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-   -   Vintage Capacitor Identification?? (http://www.diyaudio.com/forums/tubes-valves/200870-vintage-capacitor-identification.html)

wolfy 20th November 2011 04:48 PM

Vintage Capacitor Identification??
 
Hi -

New here, so hope I put this in the right section.

Anwyay, I picked up a vintage guitar effect that is dead, and I am trying to repair it. First I would like to identify the components, but I am having a hard time trying to identify this capacitor:

http://i1117.photobucket.com/albums/...o_cap1_500.jpg

Not sure what the numbers 6213 mean. I assume the J is tolerance. I assume the + indicates the cap is polarized.

Thanks,
Paul

thaumaturge 20th November 2011 05:20 PM

That looks like a date code (13th week of 1962). Need to see other side of cap for real part numbers. Looks like a Spraig electrolytic or tantalum right off.
Doc

GloBug 20th November 2011 05:22 PM

Hmm could be a 62pf with the 3 being a temp or military code.
"J" = +/- 5 percent. Polarized.

Any other numbers on it?

What effect is it? Might be a schematic somewhere.

poynton 20th November 2011 05:24 PM

1 Attachment(s)
Are there any other letters ?


.

thaumaturge 20th November 2011 05:25 PM

Way too big to be 62pf...

wolfy 20th November 2011 05:51 PM

Quote:

Originally Posted by thaumaturge (Post 2788748)
That looks like a date code (13th week of 1962). Need to see other side of cap for real part numbers. Looks like a Spraig electrolytic or tantalum right off.
Doc

Thanks all.

The other side says "20-12 DC"

Could be 20 uf? If so, what is the -12 ????

GloBug 20th November 2011 06:02 PM

Just a guess based of the information provided.
Vintage lytics usually are bigger if it's a HV cap ;)

astouffer 20th November 2011 07:04 PM

Quote:

Originally Posted by wolfy (Post 2788788)
Thanks all.

The other side says "20-12 DC"

Could be 20 uf? If so, what is the -12 ????

20uF at 12 VDC.

thaumaturge 20th November 2011 07:04 PM

Quote:

Originally Posted by wolfy (Post 2788788)
Thanks all.

The other side says "20-12 DC"

Could be 20 uf? If so, what is the -12 ????

My guess would be a 20uF 12 Volt cap. Could be depending on where it is used in the circuit. You might put a meter across it when powered up and see what voltage it is subjected to.

I'd say the date code thing is pretty solid. Most parts used to be numbered that way. As an easy check look at all the other parts in the amp. If you see a bunch of numbers ranging from say 62xx to 64xx then it might suggest when the amp was built. That's how I go about dating an unknowm piece of equipment. On mass production parts are usually made within a year of assembly.
Doc


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