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From: Sparky on 12 Nov 2009 02:41
This cap was removed from a 70's-80's German industrial machine:

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

It has no polarity markings. One terminal is common with the metal case. Is
this always an indication of the (-) terminal?

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

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

Markings on the side are:

B41111-B7108-T
1000uF 40V-
GERMANY
GPF DIN 41332 06.78

I find a few references to a Siemens part that is similar:

<http://www.screenghost.com/shop/show.asp?ID=74#>

but no datasheet can I find. Can someone more resourceful than I find one?

I cut open one of these caps. It is paper & foil (or so it seems) spiral wrap
construction. Can polarity be determined by internal construction? Is the
center terminal always one pole (ie, always +)?

Thanks.

From: Phil Allison on 12 Nov 2009 03:02

"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



From: notme on 12 Nov 2009 03:10
> 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!

From: Sylvia Else on 12 Nov 2009 03:17
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
> !!!!!!!!!!!!!

Are they? Their order is a bit strange if so.

On the other hand, take the - to be a 1, and the other symbol to be a 4
with a bit missing, and you have 1, 2, 3 and 4 in a normal order. So the
situation is far from clear enough to form a basis for installing a
replacement.

Sylvia.
From: Phil Allison on 12 Nov 2009 03:28

"notme"
>
>> 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".

** Nonsense.

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


..... Phil







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