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  1. #21
    sawmilleng's Avatar
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    BigBurt,

    You an EE...?




    Jon.


  2. #22
    bigburtchino started this thread.
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    Here are some more pictures of low grade boards that I have found these epoxy tantalum capacitors on., Going from left to right, the tan board is a thermostat board, the middle green/green is off of industrial machine monitor (B&W) and the right one is off a chemical making control board. All three are low grade boards and made in the 80's and early 90's. The tan board only had two caps, the middle had eight black caps and the one on the right had three red & orange ones. It literally takes only seconds to snip these off of the board. I do use magnifying glasses (5X magnification) that make this job much quicker. Takes much longer learning what a tantalum capacitor is and where they can be found!

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  4. #23
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    Jon, I never really considered myself a working EE, as I spent more time managing engineers and technicians. I did originally go to school for that. I spent over 20 years in the aviation community, both in the military and commercial airline. I have been running my own company now for another 20+ years none of it electronic engineering related. I can still read a schematic and a data sheet (I think?). I do enjoy breaking down E waste and it allows me to get back into the electrons and hole flow movement in a very small way!

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  6. #24
    bigburtchino started this thread.
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    Besides Silver and Tantalum, I maybe should point out the Gold. Yes that's gold in those first two boards, the tan board has nineteen test points five of them are gold and fourteen of them silver. The middle board had two removable dip chips and the sockets that they plugged into are gold plated. Here's another view of those two boards stacked on top of each other. Hopefully you can see the gold!

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  8. #25
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    Thanks, BigBurt,

    Its just kinda interesting to see the background of us SMF'ers.

    As I said in my rants about the guy making $2500/night raiding retail store dumpsters--we in the buz cut across all walks of life. The way that article characterized the typical scrappie just blew my mind. I never cease to be amazed at the common sense and intelligence that comes off of these pages, from people who are in this game. There's a few winners out there, too, but its amazing how they usually get themselves banned or just kinda slowly disappear.

    Now I see a chance at some teasing....hmmm..."boss of engineers".... Dilbert's boss comes to mind..... {wish we had Sirscrapalot here to help...} maybe something like "Pointy"?



    Jon..... unh, wondering if he should look for cover....

  9. #26
    bigburtchino started this thread.
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    I'm sure Sirs. is lurking close by and yes the diversity of this group of people has both surprised and amazed me. Then again when you get down to this business it makes more sense than anything Iv'e dealt with. Furthermore this is for a thinking persons much more than a nonthinking type. Certainly one needs to be ambitious, creative and a non-follower if you want to succeed.

    I also am of the opinion it doesn't really matter what one chooses to do, just need to work at it and do the best job with the abilities you have. In short for me it doesn't matter if one shovels monkey $hit, just do a good job at it and things will work out for the better.

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  11. #27
    bigburtchino started this thread.
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    This is a close up of the "Pizza Board". With the 37 PMT's, cards, non-soldered IC's, and the two soldered silver/tantalum capacitors, now removed. I'm guessing this would sell as a "Riser" board? All of the contacts for the cards and IC's are gold plated.

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  13. #28
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    That's what I would put it at, although "riser" boards are usually connected via a slot of their own to a larger board. IE a PCI riser board would extend more pci slots out of one slot parallel to the motherboard. Your board is what I would call a backplane. I could be wrong, it's late and I'm tired. Palletizing TVs isn't a late night activity.

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  15. #29
    bigburtchino started this thread.
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    This a picture of a nice populated board, that came out of a keyboard. Made in England in 1988, the board is called a keyboard interface. Has fourteen epoxy "drop" type capacitors, that I will not be removing. There is ten non soldered IC's that I will remove, have already removed one of them (had gold plated top and pins). This board has gold plated pins on all of the connections and jumpers as well.

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  17. #30
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    I too have started in on the tantalum hunt recently and your spot on when you said that they are nowhere near as prevalent on the "newer boards". One little thing that I have noticed that applies across the board is the color MUSTARD YELLOW. 90% of the epoxy Ta and even the ones I call bricks are mustard yellow in color. Now the tear drop ones do come in an assortment of colors but with those the shape and the fact that everyone has a little kick in one of the lead legs. Anyway that's my little tip for the easy to find ones.

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  19. #31
    bigburtchino started this thread.
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    Here is the top of the board that is cut-off in the picture above. This board is 20" x 6" and is green/green, but the other side has no components, just the solder traces. This picture shows the two different types of capacitors on this board, both "mustard" color, but only "blob drop" ones are tantalum. There is the "+" reference mark on both the board and the capacitor. Sorry about the focus error, a new camera, but still have a bad photographer!
    Last edited by bigburtchino; 02-27-2015 at 02:36 PM.

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  21. #32
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    Nice tutorial Burt thank you. One that keyboard i see a red dip switch. Pry that open, it will have either gold pins or silver balls plated with gold.
    I won't be wronged. I won't be insulted. I won't be laid a-hand on. I don't do these things to other people, and I require the same from them.” John Wayne-- The Shootist

    NEWBS READ THIS THREAD ABOUT REFINING!!!!
    http://www.scrapmetalforum.com/off-t...ning-read.html

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  23. #33
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    There are two on that board. The other one is white on the opposite side.

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  25. #34
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    very good post B. thanks.

    Burt is not suggesting making a living doing this, merely a way of increasing bottom line a little something any pro scrapper would do and should appreciate in these times. thanks again Burt.
    "anyone who thinks scrappin is easy money ain't doin it right!"

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  27. #35
    bigburtchino started this thread.
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    Thanks to both Brasscatcher and olddude coming from two respected and veteran scrappers that is important. I'm really just trying to "give back" to a group of people that have helped me.

    Brass thanks for the info on the dip switches. I have taken them off of low grade boards, will choose to not take them off of this keyboard processor "interface" board. I don't want to devalue this board, as it should be high grade with the gold and amount of IC's on this board. I have taken only the one gold top/pin IC off so far, but will take the remaining non soldered IC's (9 still on in this picture). That will still leave 49 IC's that are soldered, 14 tantalum capacitors and a bunch of gold plated pins for a future buyer.

    Blue414 the mustard yellow tantalum capacitors are by far the easiest to find, I would say they out number the other colors by a 2 to 1 ratio. Other colors are blue (second most likely color), orange, red, green, purple, grey, and black are all colors I have found in the epoxy shape so far.

    One of the things I tried to show that Tantalum capacitors have better value than most scrap. Also tried to show that they are found on a variety of boards and size of boards. From the lowest grade of brown/brown circuit board (Color TV/Panasonic), to a tan/green commercial grade thermostat, green/green low end power supply. Showed two higher end boards, the Gamma camera had the best type of tantalum capacitor, a silver/tantalum wet capacitor. The last board from a keyboard, has ten removable dip IC's and lots of extras including tantalum capacitors. The last two boards I will ship to a buyer on this forum and the low grade will go to a local e-waste broker/R2 that will ship them to a refiner in Japan. I plan to keep adding to this thread as I keep educating myself, hoping in doing so I can help others as well.

    Burt
    Last edited by bigburtchino; 02-27-2015 at 06:58 PM.

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  29. #36
    bigburtchino started this thread.
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    Just wanted to update a little more info on that last board (keyboard processor). Removed the nine removable IC's and the board weighs a little over a pound. Have seven of these boards and one keyboard that I haven't scraped yet.

  30. #37
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    Thanks for the thread. Its one that I know I'll keep going back to in my quest for the ever illusive tant . which thanks to this thread its not so hard to spot.
    Cudos big Burt!

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  32. #38
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    Im a definate newbie and with all that i have looked into this tantalum cap is like chasing your shadow in the sun untill ya get a hand on it. I have seen a few drops here and there on various mid and low grade material but the really good ones seem to be most present on telecom gear of sorts. I scraped a wave form thinggey the other day. Sorry for not getting pics but pulled 10 of the wet TA caps and found every wire connector to be gold plated. Ill fish for the parts to list the correct part number. Thanks again this one keep going and going and going. Dang TA

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  34. #39
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    Quote Originally Posted by Blue414 View Post
    Im a definate newbie and with all that i have looked into this tantalum cap is like chasing your shadow in the sun untill ya get a hand on it. I have seen a few drops here and there on various mid and low grade material but the really good ones seem to be most present on telecom gear of sorts. I scraped a wave form thinggey the other day. Sorry for not getting pics but pulled 10 of the wet TA caps and found every wire connector to be gold plated. Ill fish for the parts to list the correct part number. Thanks again this one keep going and going and going. Dang TA
    If you look at scrapping as if you are a prospector it helps to put things into prospective.
    Ewaste allows us ,modern day prospectors, to mine for more than one metal.
    Tants have good value and are worth removing. Save them up. In my opinion tantalum is just going to steadily rise in value, because its such a rare metal.

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  36. #40
    bigburtchino started this thread.
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    Junkfreak - Exactly tantalum is a rare and strategic metal. The United States for the most part has no known deposits that are commercially available. No tantalum has been mined in this country since 1959. Tantalum capacitor recycling is the best source for tantalum in this country. The electronic industry uses about 40% of all tantalum used and tantalum capacitors is what uses the largest portion of that 40%. With Africa supplying 20% (about) of the worlds needed tantalum. With the continued unrest in Africa and the uncertainties that this causes to the supply chain, there is even more demand for recycled tantalum capacitors

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