Markings....
TEF 20-50C2LNK
20MFD-50VNP
+9, 10-67 +
+ 2548676-1 +
(welded leads)
"NP" must mean non-polar.
It seems to have sealed ends, but not "hermetic glass"....they seem rubbery (black and glossy).
Are these just older bi-polar aluminum electrolytics ?
I've got about 40 of them.
TEF 20-50C2LNK
20MFD-50VNP
+9, 10-67 +
+ 2548676-1 +
(welded leads)

"NP" must mean non-polar.
It seems to have sealed ends, but not "hermetic glass"....they seem rubbery (black and glossy).
Are these just older bi-polar aluminum electrolytics ?
I've got about 40 of them.
Last edited:
OK, I'm sure they are bi-polar electrolytics.
Anybody want these ?....in trade ? (not looking for profit)
PM me.
Anybody want these ?....in trade ? (not looking for profit)
PM me.
More probably wet tantalum bipolarsAre these just older bi-polar aluminum electrolytics ?
More probably wet tantalum bipolars
Maybe I will "open" one of them up....to really find out.
Be careful: in case I am right, you'll find sulphuric acid.Maybe I will "open" one of them up....to really find out.
Be careful: in case I am right, you'll find sulphuric acid.
Thanks.....I'll wear gloves.
Don't forget the goggles too, in case he tries to spurt you in the eyeThanks.....I'll wear gloves.
If they are old and either tantalum or electrolytic they probably aren't going to be of much use.
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