Help identifying dead electro. cap polarity?

"Sparky"

The usual cause applies ?????

FYI:

The markings are clearly 1, 2 and 3 with the fourth a NEGATIVE sign !!!!!!!!!!!!!

Is not the negative sign *right next* to the pin linked to the case ?????

.... Phil

To me they look like "1" (not a "-"), "2", "3", and a really weird "4".

But with your help along with the one pin (yes, it's the (-) one) in common with the case pretty much confirms polarity.

Thanks!

Nighty-night! Lights out!

"notme"

The stroke on the " 1" has been made longer to avoid confusion with the " - " sign.

.... Phil

AFAIK Germans always write a ONE with a tag ( opposite 2) and a 7 with a tag through it that makes it look like a lower case t. So I suggest the - really is MINUS.

TTman Inscribed thus:

I agree ! That is how I read it.

Almost always, but ISTR reading warnings that occasionally you come across one made for use with a negative supply rail, when the can will be positive, so you're right to make sure.

However, in this instance I agree with other posters that the markings indicate that the can is negative.

Chris

Me, I'd guess the terminal marked with the '-' is negative, but that's just my warped thinking.

Ahh but it's german. They make the 1 with that little hat. And then when they make a 7 they always add a cross through the middle... so as not to confuse it with the one.

George H.

Sparky schrieb:

HTH

Reinhard (native German ;-) )

How is it wired in the circuit? When in doubt, this is what I look at. You can also substitute it with an AC rated cap and just measure the voltage across it to find out which way around it should be.

For modern capacitors, yes, *BUT* there were some chassis-mounted caps with POSITIVE (outside) cans/cases.

The Germans (and those in many other Continental European countries) certainly do that when WRITING the number 7. However, I can't recall ever seeing it on a PRINTED 7. This is (of course) because they start writing a 1 (one) with a long slanted up-stroke, followed by a vertical down-stroke. As such, it's not unlike an 'artistically' written 7. The addition of a horizontal stroke through the vertical down-stroke of the

Most non-Europeans write a 1 (one) as a single vertical down-stroke, so there is no possibility of confusion between a 1 and a 7. However, if you decide to embellish a 1 with the short slanted up-stroke at the top and the foot at the bottom, you have to be careful that it cannot be confused with a 2.