I like your pictures. Kinda artsy.
Love finding these treasures!
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I like your pictures. Kinda artsy.
Love finding these treasures!
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This is a new one for me, I think it's a prototype as there is a hand written sticker that say's 55 of 227. It has six Siemens CS13B tantalum capacitors, I'm going to leave them on for now. I have already removed six gold plated transistors and five gold plated IC's, going to put them back in. I want to keep this board as is until I learn more about it. It was made in 1979 and they don't make them like this any more.
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I need to make a correction, the large capacitor in this picture (below & right of red led) is not a tantalum capacitor. This is the largest capacitor in the picture, it has a crimped case on the anode side and has a red epoxy seal at the anode as well. The confusion on my part was the + signs all over the capacitor, the epoxy sealed anode, removed from a high end telecom board and the crimped case at the anode. What made me look into more today was it was the only type of this style I have found, it was much larger than any other (too good to be true) and most important non-magnetic. It is a Sprague 630D Aluminium electrolytic capacitor. Sorry for any confusion this may lead to and I will try to do better.
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You did better as you found your own mistake and corrected it. Good job on expanding our knowledge.
P & M Recycling - Specializing in E-Waste Recycling.
If you enjoy your freedom, thank a vet.
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I'm going to post some pictures of some capacitors that are not tantalum Capacitors. I have tried to be accurate, but a couple have "fooled" me with + signs both on the board and the capacitor.
Yep I've gotten fooled a lot. Not so much now, since you started this thread! Thanks big Burt.Originally Posted by bigburtchino
Metal Recycling Entrepreneur
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ok guys I had a cool finding last night that I could not wait to pass on. In the elusive search fo Ta we know that the occasional "drop" could be on several things and the most valuable (wet & silver) are typically on telecom gear. Now I found a good ammount of the yellow bricks in car steros. Now these are the kind with the screen that flips out like a 7" monitor. I forgot my phone today but will be back tomorrow with more information. I just landed a solid contact with a stero repair/installation shop and all the junk is headed my way. He used to take them to the yard for shread price and when I said I would give him 2x that he was happy. 2 35 gallon trash cans cost me 7 bucks (had 7 on me and he said great). More info and pics soon. To me this was just one of those scrapping gems
Metal Recycling Entrepreneur
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I just want to say thanks and re-energize this thread. There is a ton of great info here. Hope to be on the lookout for these soon myself.
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I plan to keep adding to this thread as I find useful and good information on the subject of Tantalum Capacitors. I thank all of you that have acknowledged and recognized this information as helpful. I want to recognize all the members of SMF, the Admin. (helper, one I think), and especially the moderators, you all have helped me learn and grow so it is I who thanks you! Many have came and contributed to this forum before me, unselfishly sharing with all their hard earned lessons. I hope this forum continues to be the great resource that it has certainly been for me. What this forum has done best, is demonstrate people care and want to help each other, that is a really good thing!
I think Eric deserves my thanks the most, it was he who provided me through this forum, THE OPPORTUNITY TO LEARN! Others have as well, so I started looking into the mysterious and hard to spot tantalum capacitor. Thank you Eric for sharing your knowledge on this subject, you do this I know with little self gain. For me it has rekindled my interest in electronics, something I started way back in the mid 70's, going to school for, working in the aviation industry for well over twenty years. My career in electronics was very good to me, allowed me to retire from one industry. Buy my own company, completely non-electronics related, that path another twenty years later led me to my newest endeavor, becoming "A SCRAPPER".
I will as much as possible keep adding to this thread, encourage all to do so as well. If we all continue to help each other, we will learn, grow, and add to a very needed task, being " A SCRAPPER".
Last edited by bigburtchino; 06-13-2015 at 03:11 AM.
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Going to add some pictures of a new type of tantalum capacitor that I recently removed from a circuit board. This capacitor is only new to me and perhaps not seen before to most members of SMF. I have only found five of these so far, all five were removed from some X-ray equipment from the early 80's.
I had originally took pictures of the capacitors installed, still attached to the PCB. These I keep on my camera memory, next normally download to notebook that I use for internet & desktop sharing. I let my GF use my camera last week and she cleared about two weeks worth of photos. She didn't like something and "all those scrap pictures" was useless information too! So the picture of the board is history. I did want to show how these TA's are attached to the circuit board. It's is hard to spot these one's if you don't know what they look like. Hard in that they are installed through-hole method, for a radial type capacitor and mounted vertically, "standing up". They are used as a "Space Saving" tantalum capacitor, designed for use on densely populated circuit boards. The labeling identification on these caps was on the side of the capacitor, really hard to read when installed. The picture of that board would be very helpful in showing what to look for. How I found them, was looking at this board because there was a lot of components I had not seen before. The five TA's were part of a timing/logic circuit and I wanted to know why? Used a desktop magnifier with 360 lighting, allowed me to spot "+" on the TA's side. It was one of those first black TA's and I desoldered it, spent about a week with capacitor data sheets and catalogs (the hunt was on). A buyer here posted a picture of what he called "inserts", that narrowed it down for me considerably. I'm not sure if what he called inserts is the same, hard for me to tell as his photo is capacitors shown in a bulk load. They looked very similar to what I had. Within a hour of seeing his photo and the similarities of what I had, it was a "bingo" moment.
Mine are T330's made by KEMET Corp., a PMT (Precision Molded Tantalum) capacitor. A radial leaded, through-hole rectangular, precision molded, polar type, and a high density solid sintered tantalum pellet (mouth full). There are four series of this type of capacitor the T330, T340, T370 AND T372. All have four to seven case sizes (package). I have only these so far, but didn't know what to look for until now. I'm sure I'll find more and hope this can help others as well.
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Last edited by bigburtchino; 06-13-2015 at 05:27 AM.
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Working on sorting some boards today, inside because it's 100+ today outside. Came across four of these gold finger boards, they were kind of hard to see and the board had the + markings all on the back side. These Cap's have all the conditions that have taught me they are indeed tantalum capacitors. 1. high grade boards 2. + markings on both the capacitor and the PCB 3. the case or body type is of a known tantalum capacitor from others I have researched 4. they all have magnetic properties. These caps are all black epoxy molded "bullet" shaped and have + marks in two different locations. They are marked MTAC, I believe that is a manufacturer, but I'm not familiar with them. I have also not been able to find data sheets on them. The board was made in 1980 and all the date codes on the components are from 1979. Does anyone know about the markings "MTAC"? Here is some pictures too!
Sorry about the quality of pictures (too much light), they did look good on camera, not so after downloading.
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Kamet made that style and they are the T310 series. The MTAC seems like a AVX part number but it's hard to tell at times. Could also be a Mallory number too. I'm looking for my old part cataloge for the late 70-80 when I find it I think it will help.
Last year I unreeled 6 pallet of them and filled an entire Gaylord full of them.
Eric
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I thought I had seen something about them being made by Union Carbide (trying to find my notes on this). I think KEMET was sold to a management group from the original UC division. Thank You for your info, gives me a direction to go with. I wish I had a gaylord full of tantalum caps. Was reading your post on the G.R. forum and reminded me to ask you, your the man!
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This picture shows part of a circuit board, there is six capacitors that can be seen. Can you spot the tantalum capacitors? There is two different type of tantalum capacitors, if that helps!
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CORRECTION: SEVEN CAP's
Last edited by bigburtchino; 06-29-2015 at 03:53 PM.
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Yesterday I broke down eight industrial X-ray monitors, these were made between 1980 and 1984. I'm going to show a couple of pictures here of the tantalum capacitors. Interesting thing about these monitors was the fact that they had just about every type of capacitor that is made. This included 17 tantalum and 11 silver mica capacitors. If someone wanted to test their knowledge on how many different capacitors they could identify, these monitors would be a challenge for the most experienced tech. Maybe later I'll post a breakdown of the monitors in another thread.
Metal Recycling Entrepreneur
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Let me take a guess. All four silver ones are TCs?
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Maybe a picture of one type will help, same board just a different location.
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These monitors had three circuit boards, a analog, digital and a video control board. This is a picture of a section of the analog (output side) with 6 TC's.
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Correction only 5 TC's, I edited photo and cut off one by mistake!
Last edited by bigburtchino; 06-29-2015 at 08:00 AM.
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This is a picture of the CRT (THE SMALLEST I'VE SEEN).
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The picture face is just 3" x 3 1/2", made by Ball Electronic Display Division (model CD5).
In some old video cameras(I think it was video cameras) I've found them as small as 1.5" x 1". Wish I had one around for a photo but...This is a picture of the CRT (THE SMALLEST I'VE SEEN).
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The picture face is just 3" x 3 1/2", made by Ball Electronic Display Division (model CD5).
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