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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
http://i50.tinypic.com/14jtc0l.jpg
Electrolytic? Tantalum? Manufacturer? Data sheet? Thanks. |
#2
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
Paul Conners wrote:
http://i50.tinypic.com/14jtc0l.jpg Electrolytic? Tantalum? Manufacturer? Data sheet? Thanks. Siemens. At least from the trademark. Possibly 1 UF at 40 VDC Jeff -- “Egotism is the anesthetic that dulls the pain of stupidity.” Frank Leahy, Head coach, Notre Dame 1941-1954 http://www.stay-connect.com |
#3
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
On Wed, 19 May 2010 16:17:22 -0700, Paul Conners
wrote: http://i50.tinypic.com/14jtc0l.jpg Electrolytic? Tantalum? Manufacturer? Data sheet? Thanks. Siemens logo. John |
#4
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
Paul Conners wrote:
http://i50.tinypic.com/14jtc0l.jpg Electrolytic? Tantalum? Manufacturer? Data sheet? Siemens. At least from the trademark. Possibly 1 UF at 40 VDC Jeff Type? |
#5
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
On Wed, 19 May 2010 17:09:05 -0700, Paul Conners
wrote: Paul Conners wrote: http://i50.tinypic.com/14jtc0l.jpg Electrolytic? Tantalum? Manufacturer? Data sheet? Siemens. At least from the trademark. Possibly 1 UF at 40 VDC Jeff Type? Nice photo. Dimensions would have been helpful. My guess(tm) is Tantalum. It's not ceramic as it appears to be polarized. It's not metalized film, for the same reason. It's too small for electrolytic. That leaves tantalum. Siemens sold their cazapitor division to EPCOS: http://www.epcos.com I couldn't find anything on the site resembling that capacitor. I recall using similarly packaged caps back in the 1970's from Kemet. I couldn't find any Epoxy B packaged tantalums on the Kemet site, but there are similar packages with what looks like the right lead spacing. See: http://www.kemet.com/kemet/web/homepage/kechome.nsf/weben/014FB383A945D0938525751600535A31/$file/F3296_ProductSelection.pdf#page=3 and look for "Tantalum Molded Radial" on Page 7. If you have a Digikey or Mouser printed catalog, you might want to skim through the pages and see if there's something similar. I'm too lazy to do it right now. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#6
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
"Paul Conners" http://i50.tinypic.com/14jtc0l.jpg Electrolytic? Tantalum? Manufacturer? Data sheet? Siemens. At least from the trademark. Possibly 1 UF at 40 VDC Type? ** Looks very much like some German made " long life " electros I see in audio equipment made by Quad in the UK in the late 1970s and 1980s. Normal electros, airtight sealed in a plastic housing. Funny thing is, they nearly all failed ( high ESR or open) after 10 to 15 years. ..... Phil |
#7
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
Nice photo.
Thank you Canon! (A620, handheld.) Dimensions would have been helpful. 7 mm H, 4 mm W & D. My guess(tm) is Tantalum. It's not ceramic as it appears to be polarized. It's not metalized film, for the same reason. It's too small for electrolytic. That leaves tantalum. Being molded plastic, does this automatically rule out electrolytic? Siemens sold their cazapitor division to EPCOS: http://www.kemet.com/kemet/web/homep...383A945D093852 5751600535A31/$file/F3296_ProductSelection.pdf#page=3 and look for "Tantalum Molded Radial" on Page 7. Resemblance? Color? The originals are black and beveled at the front corners. None of these are. Other than physical, not much to go on... Thanks. |
#8
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
** Looks very much like some German made " long life " electros I see in
audio equipment made by Quad in the UK in the late 1970s and 1980s. Normal electros, airtight sealed in a plastic housing. [Groan...] Just when I was convincing myself that they were poly-somethings. Funny thing is, they nearly all failed ( high ESR or open) after 10 to 15 years. .... Phil Yeah, I suspect the electros on this PCB causing all sorts of problems. Just hoping that all the "traditional" form-factor caps I'd replaced were all the bad ones. Now this non-standard fare... Thanks, Phil. PC |
#9
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
Dimensions would have been helpful.
7 mm H, 4 mm W & D. 7,3 x 4,2 x 4,7 mm The Siemens type was "B 45 181" My guess(tm) is Tantalum. Yes. There was an odd old rule "3 Ohm / Volt" for minimal impendance to drive normal tantals. These claimed to be "schaltfest", somewhat better quality. MfG JRD |
#10
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
"Paul Conners" wrote in message ... ** Looks very much like some German made " long life " electros I see in audio equipment made by Quad in the UK in the late 1970s and 1980s. Normal electros, airtight sealed in a plastic housing. [Groan...] Just when I was convincing myself that they were poly-somethings. Funny thing is, they nearly all failed ( high ESR or open) after 10 to 15 years. .... Phil Yeah, I suspect the electros on this PCB causing all sorts of problems. Just hoping that all the "traditional" form-factor caps I'd replaced were all the bad ones. Now this non-standard fare... Thanks, Phil. If you think one/some are faulty, make a note of value/voltage and break one open - the difference between an alu' foil electro and a tant' should be easy to see. |
#11
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What caps is this?
On Wed, 19 May 2010 22:05:48 -0700, Paul Conners
wrote: 7 mm H, 4 mm W & D. My guess(tm) is Tantalum. It's not ceramic as it appears to be polarized. It's not metalized film, for the same reason. It's too small for electrolytic. That leaves tantalum. Being molded plastic, does this automatically rule out electrolytic? Possibly, because I've never seen any electrolytics in Epoxy-B molded packages. However, Phil Allison indicates that they might be electolytics, so I can't be 100.0% certain. Worse, the original photo shows a silk screen component outline that's somewhat larger than the Siemens capacitors. I'm fairly sure that anything 7x4x4mm would be tantalum, but the larger outline size could easily have been either tantalum or electrolytic. The originals are black and beveled at the front corners. None of these are. Other than physical, not much to go on... A Kemet substitution might be problematic as they don't have a packages that's an exact match. Sorry for the diversion. If you don't want to crack one open to see what's inside, and finding an exact substitute seems to be a problem, then replacement with a simple dip tantalum 1uf 50v should both fit and work. I don't have any problems with substituting tantalum for aluminum electrolytic because of the lower ESR of tantalum. However, going the other way will probably not work. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#12
Posted to sci.electronics.basics,sci.electronics.components,sci.electronics.repair
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What caps is this?
I'm fairly sure that anything 7x4x4mm would be
tantalum... They are tantalum: http://www.datasheetarchive.com/pdf-datasheets/Datasheets-17/DSA-334079.pdf The German electronics news group was the resource that broke the case... Thanks to everyone who contributed. |
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