tantalum capacitors

etack · Oct 16, 2012

http://recycletantalumcapacitors.com/

more pictures @ http://recycletantalumcapacitors.blogspot.com/

[email protected]

I buy tantalum capacitors.

$20.00Lb Wet electrolyte axial
$15.00LB solid electrolyte axial
$15.00LB polycoated axial,SMD,through hole
$5.00LB foil style or arrays
$50.00LB for prepared anodes
$75.00LB silver wet caps (no leads)

I included so examples of tantalum capacitors I would like more pics of the can type so if you got them post them please.

Any questions relating to Ta capacitors in general please post. Any deals please keep to PM’s but please review your
dealings with me.

I also toll refine silver contacts and solder or jewelry. I can return cemented silver melted into bars or minted silver one TOz rounds. I prefer not to buy them outright but that is not out of the question.

I do other refining from e scrap and karat scrap on a toll refining basses.

PM or email me if you have question.

Eric Tackett

Added pic

acpeacemaker · Oct 16, 2012

Hey,

GSP stated in a post he believed the red plugged ones were running 40% ag.

-Andrew

etack · Oct 16, 2012

http://goldrefiningforum.com/phpBB3/viewtopic.php?f=39&t=2919&hilit=Tantalum+silver&start=20

This is a good thread on it.

I will buy the silver too but what I want is about the Ta. I don't want people to think I'm trying to get their silver but the reality is the majority of Ta capacitors are not silver. I have never come across one yet although I'm always looking :lol:

Thanks for the pics now people can separate them out and just sell me the pellet. :lol:

Eric

Marcel · Oct 16, 2012

I got some kg for sale or tollrefining. Email with details has been send to you.

Marcel

Geo · Oct 16, 2012

a good way to tell whether a canister type is electrolytic capacitor or tantalum is to use a pair of cutters and try to cut it in half. an electrolytic capacitor will crush flat and a tantalum capacitor will barely make a dent. i have found some tantalum canister types that were as large as the big electrolytic capacitors. ill try to find a photo of one.

DONNZ · Oct 17, 2012

A list for components with listed elements would be good. Competition out there is fierce for that gold.

Did a search on this one:
Tantalum itself is not magnetic (does not generate the magnetic field); however, it is a paramagnetic material...meaning it will react to a magnetic field.

etack · Oct 17, 2012

none of what is in your pic is tantalum the only part that is magnetic is the part that is welded to the nickel leed. If there is a nickel leed. The pic is an example of what I'm looking for. they are also cylinders, and they can't be melted with a torch.

A list of what is in other parts and components is a good idea but I would prefer that this thread be solely tantalum caps.

This to not confuse people as to what it is that I'm buying. If you want to ask if it is a Ta cap then post away. 8)

Thanks for your interest
Eric

DONNZ · Oct 17, 2012

Not trying to confuse just trying to identify and finding the best places to look for them.
Looking in the wrong box of many boxes.

Did fine some help with the visual ID, I think.

http://www.alliedelec.com/search/searchresults.aspx?dsNav=Ny:False,Ro:340,N:106-4294887054-4294959754

92 pages worth.

Applications:
Telecommunications (e.g. mobile phones, infrastructure)
Data processing (e.g. laptops, mainframes)
Measuring and control engineering (e.g. voltage regulators)
Automotive electronics (e.g. navigation systems, electronic control units)
Medical engineering
DC/DC converters

nivrnb · Oct 18, 2012

Etack,

I have some and would be willing to sell, trying to get together as much as I can to make it worth while. Just wanted to post some photos, in the one photo of the silver case caps I have a mixture of other components I thought had silver in them. If your interested lets talk.

Rob

nivrnb · Oct 23, 2012

Eric,

On the IBM Board Collection link you talked about the in line resistor being ceramic. I have taken some of those off and yes some are ceramic. But the ones I have taken off in the photos below look like tantalum, can you identify? Have you seen them before. The blue caps I posted above are monolithic. I have some componets that I need to Identify.

Rob

etack · Oct 23, 2012

The pics that you posted I can't be sure if they a Ta Caps. The best way to test is to burn with a torch and see. The Ta in the caps will turn yellow-orange hot and not melt most of the time they have Ta wire sticking out but not always.

the blue ones that you refer to as "monolithic" I would burn too I think that they are being named "differently" on Ebay.

Look at this link for some color codes about halfway down is the Ta cap codes. http://pcbheaven.com/wikipages/Reading_Part_Values/

Eric

butcher · Oct 23, 2012

nivrnb,
In your photo's
The first one I am not sure of could be capacitors or resistors, usually markings on the circuit board can be clues like R5 (for resistor number five), or C33 (capacitor number 33).

The second picture looks like power resistor usually wire wound.

Third and forth picture are bridge rectifiers (four diodes in one package) for changing alternating current to direct current.

macfixer01 · Oct 23, 2012

butcher said:
nivrnb,
In your photo's
The first one I am not sure of could be capacitors or resistors, usually markings on the circuit board can be clues like R5 (for resistor number five), or C33 (capacitor number 33).

The second picture looks like power resistor usually wire wound.

Third and forth picture are bridge rectifiers (four diodes in one package) for changing alternating current to direct current.

Ummm no, or I don't think so anyway. I also thought at first that those devices labeled 5615732 looked like bridge rectifiers, but the pin labels are wrong for that. A bridge rectifier has two AC inputs normally marked with sine wave symbols, and two outputs labeled + and -. This device has two + pins and two - pins. It may be some special purpose device with two diodes in the same package? Or for all I know it could be some sort of dual capacitor? If we knew the manufacturer there might be a chance of looking it up online but the number itself doesn't lead to anything.

macfixer01

butcher · Oct 23, 2012

macfixer01,
By golly your right, I missed that, now that you pointed it out, I guess I did not look at them close enough.

nivrnb · Oct 24, 2012

Thanks everyone, the small black object, came from and IBM 360 board. No other identification on it. Butcher thanks for identifiying the power resistor. The top photo I did not look at the board when I took it off.

Rob

butcher · Oct 24, 2012

if you have a meter you may be able to tell what the black cubes contain, A diode will pass current one direction and not the other it is like a check valve in plumbing.

nivrnb · Oct 29, 2012

Butcher,

I tested the components like you suggested with my diode checker and I got a .0 and .0 when I reversed the polarity. The search continues and wanted to post some photos of the tantalum caps taken apart. While I was taking these apart I noticed that they have a black substance covering the metal. While placing them in a glass container, I noticed that this black powder kept forming, for this being metal it sure acts like carbon. So I took a piece to some sand paper and I could finally see the metal.

I am thinking that the smaller ones must surely be a small piece of metal under the coating.

Rob

etack · Oct 29, 2012

Hey nivrnb great pics this is a great article on Ta caps short and to the point.

http://technology-electronic.blogspot.com/2010/06/tantalum-electrolytic-capacitors.html.

The black powder looks to be MnO2 and Tantalum pentoxide. If you heat it with a torch it turns to Ta metal.

The blue caps that you thought to be monolithic caps appear when torched to be that. They have no wire extending out of the middle and are a different color. They are black with silver bands on the ends and when heated they don't oxidize. I don't know if they contain other PMs thoe I don't see why they would not.

Thanks for your interest and info.

Eric

butcher · Nov 2, 2012

Just thought I would look around and post a little on capacitors

http://en.wikipedia.org/wiki/Silver_mica_capacitor

Does this look familiar?
http://dumbledore.hubpages.com/hub/Palladium-An-overlooked-E-scrap-Recycler-Resource

http://www.kemet.com/kemet/web/homepage/kfbk3.nsf/vaFeedbackFAQ/814E07593EC6218985256BCD004EBC1A/$file/jn97tctp.pdf

Notice part number:
http://www.digikey.com/Web%20Export/Supplier%20Content/JohansonDielectrics_709/PDF/JDI_Training_MLCC-Basics.pdf?redirected=1

http://old.iihr.uiowa.edu/~hml/people/kruger/Publications/ChipCenter/CeramicCapConst.pdf

The older silver cases tantalum capacitor:
http://www.mallory-sonalert.com/capacitor/2_3.htm

http://www.mallory-sonalert.com/capacitor/2_3.htm

Tantalum:
http://en.wikipedia.org/wiki/Tantalum_capacitor

Gold cap capacitors (I would call them carbon caps):
http://www.panasonic.com/industrial/components/pdf/goldcap_tech-guide_052505.pdf

Ceramic:
http://en.wikipedia.org/wiki/Ceramic_capacitor
http://www.vishay.com/docs/23108/561r.pdf

etack · Nov 7, 2012

If want I am trading silver for Ta caps

Eric

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