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Old 28th February 2010, 12:04 PM   #1
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Default One of the best RIAA Network capacitor - for me unknown Brand

Who knows the exactly name of very high voltage booster capacitor manufacturer to the logo "db" (see attachement) ?
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File Type: jpg db-booster.jpg (36.4 KB, 684 views)
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Old 3rd March 2010, 07:30 AM   #2
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Dubilier?
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Old 3rd March 2010, 07:55 AM   #3
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Quote:
Originally Posted by audiopip View Post
Dubilier?
I have found "Cornell Dubilier" (CDE) and Dubilier
Cornell Dubilier Electronics, Inc. - Your Source for Capacitor Solutions
Dubilier - Capacitors
and I will ask by both - Thank you for your advice
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Old 8th March 2010, 05:21 AM   #4
Wuhduh is offline Wuhduh  Denmark
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Hello from West-Berlin !

Maybe handmade for: " db-Systems " @ Switzerland ?
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Old 22nd November 2012, 11:47 PM   #5
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Quote:
Originally Posted by Wuhduh View Post
Hello from West-Berlin !

Maybe handmade for: " db-Systems " @ Switzerland ?
I don't think so.

Any news?
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Old 23rd November 2012, 01:49 AM   #6
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Early trademark for Dolby Labs?
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Old 23rd November 2012, 06:36 PM   #7
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Maybe this link gives you an Idea.

According to it, DB simply means "Dauerbetrieb" indicating that this snubbers are meant for continuous operation. There are also "Anlaufbetrieb" capacitors. To prevent damage in field repairs of Motors the capacitors were labeled to their usage type... (These Replacements typically would have been done by mechanics, not electricians, so a reasonable saftey measure).

This would explain why dispite quite a number of threads in numerous Forums no one ever came up with the correct Vendor

Mike
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Old 24th November 2012, 10:21 AM   #8
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I talked a bit by phone and have heard follow:
The logo "db" is an abbreviation.
The associated brand name was the German surname (family name) "DörrBeck" - a small German manufacturer of high quality capacitors, mainly for the use in horizontal fly back stages (arround the "BU" transistors in televisions).
A picture you will find in post #1.
This brand wasn't purchased or overtaken by a new company.
This means, that the background knowledge of this company isn't available for others.
There are no broshures, folders, datasheets, publications or other printed material on the web.
This means, only the released reports (news) and advertisements in vintage electronic magazines from those days is available.

Perhaps one of the members can look for this (1970s and 1980s).
about the thread
Overview from world's best historical and currently available electr/audio Magazines
I have listed some magazines.


BTW - the colloquial term for this device here in Germany by the most suppliers was "Booster Kondensator" (PLASTIC FOIL BOOSTER CAPACITOR by the supplier DÖNBERG). Today the colloquial term would be "Snubber Capacitor" - so I think.
The currently available substitution are the WIMA FKP versions, unfortunately not available with axial leads.
The Roederstein versions (ERO) like this picture about
http://oldtube.com/ERO-MKP1842-468.jpg
is not a perfect replacement.

Last edited by tiefbassuebertr; 24th November 2012 at 10:36 AM.
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