Help identifying dead electro. cap polarity?

[Robert Baer]

Phil Allison wrote:

"Sparky"

This cap was removed from a 70's-80's German industrial machine:

http://i37.tinypic.com/10psxg3.jpg

It has no polarity markings.

** Bullshit.

One terminal is common with the metal case. Is
this always an indication of the (-) terminal?

** Yep.

The base has molded terminal locations numbered 1-4, two of which are
empty:

http://i36.tinypic.com/e6x542.jpg


** Are you totally blind ????

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



For modern capacitors, yes, *BUT* there were some chassis-mounted

caps with POSITIVE (outside) cans/cases.

 

[Ian Jackson]

In message
<37a5b8a3-0141-4a1b-92d4-9b3db50fbb0b@k17g2000yqh.googlegroups.com>,
George Herold <ggherold@gmail.com> writes

On Nov 12, 3:10 am, notme <no...@notme.org> wrote:
The markings are clearly 1, 2 and 3 with the fourth a NEGATIVE sign

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

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

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!

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.

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
7 prevents it from being confused with a 1. With a printed 7, the top
stroke is definitely horizontal, and there is no confusion.

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.
--
Ian