Buying Ta cap and more!!! - Page 2

Originally Posted by etack

Hi Marcus thanks for your interest. most of what you have pictured in your first pic are Tantalum cap. You seemed to have included some SMD ceramic caps (little brown ones). thees are good to save for other buyers if you depopulate boards. The back rectangles ones you need to check on the board to make sure you are removing the ones with a C###'s not ones with a D###'s The ones with a d and some #'s after it means that it is a diode not a Tantalum cap. Some of the other ones I can not see all that well so I will need a more clear picture. The second pic is of Al electrolytic caps. they are of no value to me. You referred to them as having a (-) marking this is a good way to differentiated them from Al caps tantalum caps are polarized on the (+) side.Tantalum can style will have the polarize (+) clearly marked look at my first pic and you can see that they have a weld in the (+) side or some other marking.

If you look at this picture from wiki you can see what I mean. the difference between Al and Ta caps polarity.

Let me know if you have any other question, and thanks for posting in the thread so other can get informed as well.

Eric

Ok becoming clearer, I see now that my confusion is not uncommon. As I collect them and see what I am getting I will continue to post. I have read way to much about Ta Caps and and am still slightly confused. As I learn more I will post here to help everyone figure this out. It is my opinion that while precious metals climb higher those of us prepared with information will be the most likely to profit. I am trying to position myself to ave as much knowledge about components as possible.

Thank you for taking time time to clear things up.

I have a line on an auction lot that lists 75000 Ta capacitors. They appear to still be on the paper (?) strips they come on. Would you rather have them still on the paper tape for possible re-sale? Or off the tape for easier recycling weigh-out?

THANKS!

Originally Posted by dave

I was wondering if you would do a pay on sort thing if I'd shave some boards and send the material?

No I don't have the time to sort through stuff like that.

Most of the time shaving boards is a wast of time.

Eric

Originally Posted by wayne1956

So if I am looking on the board and it has C### (with C representing capacitor and # representing a number), and it has two leads then it should be a tantalum capacitor?

NO this is just the first step in IDing the Tantalum cap. Finding out if it is a capacitor or just a resistor or diode. After you see it is a capacitor you the match it to a style SMD or though hole (has two leads and is soldered though the board). SMD will look like the picture in your post except for a blue style the are all there. If the ate though hole than they will be poly coated or can style. both styles will have at least one magnetic lead it is nickel. If the are can style they will have leads coming out of the ends and will have a weld spot to a nickel lead. If they are poly coated they will look like the pics I have.

Post any questions you might have.

Eric

Originally Posted by etack

Eric

Just in case, the first two caps (silver & black, - minus is marked black) in that pic are not Tantalum

Apple/mac computers seem to be absolutely loaded with Tanti caps.

Originally Posted by hobo finds

So $25.00 a pound for them??

No its $25.00 for the pellet\foil\can that is tantalum. I pay $6.00# for the caps with the poly\non Tantalum can still on the pellet. A lot of the cans are not Tantalum some are though.

I reimburse shipping on larger amounts 10+# of cap or 3+# of pellet\foil\can that is tantalum.

how long it takes you to fill up a bucket is all depends on how you get them. If you get them as NOS on reals\bags then not to long. If you do a lot of Sun servers or ham radio\milli stuff there are a lot on those boards. most of the time if was expensive to procure than you will find some on them. Some older low grade boards will have them because they have been in use sense the 60's in test equipment radios some TV's.

hope this helps

Eric

Added trimmed ram to pricelist

now buying trimmed ram @ 7.50 a pound or five pound for a 1TOz silver round

Eric

tantalum check and price check for these: theres 2 black ones in the bottom im wondering about they are flat and black colored just like the flat yellow ones in the ziplok bag?

It looks like you have some network resister mix in with you caps. The Tantalum caps will for the MOST part only have two leads a (-) one and a marked (+) one. All of the rectangle ones should be Ta caps.

Hope this helps and thanks for saving them.

Eric

Originally Posted by etack

It looks like you have some network resister mix in with you caps. The Tantalum caps will for the MOST part only have two leads a (-) one and a marked (+) one. All of the rectangle ones should be Ta caps.

Hope this helps and thanks for saving them.

Eric

well thats easy enough to fix, fortunately i am not very far into these yet. are the network reisistor worth anything or just scrap?

Originally Posted by jghilino

well thats easy enough to fix, fortunately i am not very far into these yet. are the network reisistor worth anything or just scrap?

I'm glad to catch you early in the hunt.

network resistors are not worth any thing to me.

Eric

thanks, i am looking over these boards again and now i am noticing the black ceramic tantalum caps, argh

do you buy mlcc's by chance?