Experience from Bulgaria

[teclu]

How about 2T610A or 2T931A?

38 mg and 22 mg

110 pieces KT601A transistors - 0.94 grams of nice yellow gold 18-20K.

110 kt601a = 2,75g Au 24k... of course, if you can get him out....

Teclu,

What is the yield per chip on that "Stuff3.jpg" pic with the white eproms?

k573rf1= 35,87mg Au and 49,41mg Ag

When I have some time, and if anyone interested, I will post a picture album with my russian and non-russian electronics....

teclu

 

[samuel-a]

it will be very interesting talcu.

part pic and it content

 

[Barren Realms 007]

That would be nice to see if you have the time to do that.

 

[pinman]

Please yes! I am amazed and impressed with how meticulous you are.

 

[Platdigger]

And, Yes please!
This is good stuff.... 8)

 

[plamenppp]

How can I get out the whole of it? I tried with the electric cell and that was it - 0.94g from 110 pieces. Where am I wrong?

 

[Platdigger]

inside

The outside may disolve in sulfuric (around 35 percent), with a bit of H2O2, now that they are deplated of gold.

Or you could try hcl with time.

 

[Irons]

How can I get out the whole of it? I tried with the electric cell and that was it - 0.94g from 110 pieces. Where am I wrong?

There maybe considerable Gold in the eutectic solder between the Silicon chip and the case.

 

[plamenppp]

About the transistors - yes, there is some gold left under the silicon chip but is is very small amount. Are we talking about the same KT601A (8807) - those with the white caps?

http://tgvtgv.snimka.bg/other/platki.472331.17364722 - I've been waiting for this for a long long time and I finally found a place where to but it from.

 

[teclu]

About the transistors - yes, there is some gold left under the silicon chip but is is very small amount. Are we talking about the same KT601A (8807) - those with the white caps?

http://tgvtgv.snimka.bg/other/platki.472331.17364722 - I've been waiting for this for a long long time and I finally found a place where to but it from.

Yes, as the 600 series, with long legs and belly plated...

For your Ag alloys the average of the pure Ag is approximatley 8% .

teclu

 

[plamenppp]

I will have only the silver from there - they will remove the silver circles for me.

 

[plamenppp]

Step by step, a lot of practice and patience is all you need.
http://tgvtgv.snimka.bg/other/platki.472331.17381647
The biggest one (quess why it is pink) was the first one. After that it was another one (with bad quality) and another one (with worse quality) and another one - the yellowest of all.

 

[plamenppp]

Where is the tantal? I started to collect them this morning from some 40 Bulgarian PCBs.
http://tgvtgv.snimka.bg/other/platki.472331.17417553

Question to, Teclu, again. What is the yeild from KT602 БМ (1982) and KT131?

 

[teclu]

Where is the tantal? I started to collect them this morning from some 40 Bulgarian PCBs.
http://tgvtgv.snimka.bg/other/platki.472331.17417553

Question to, Teclu, again. What is the yeild from KT602 БМ (1982) and KT131?

K53 type russian capacitors?.. tantal in anode, TaO(92% Ta) sintered, a black cylinder...

kt602...36mg
kt131...place a picture

teclu

 

[plamenppp]

KT602 - I just do not believe! - http://tgvtgv.snimka.bg/other/platki.472331.17440192 - It is the small black plastic covered transistor (or whatever it is)
KT1312Б (I was may mistake for the name) - http://tgvtgv.snimka.bg/other/platki.472331.17440173
They look like aluminum but inside there is some gold - you can see from the picture.

How about these? http://tgvtgv.snimka.bg/other/platki.472331.17440877

 

[teclu]

KT602 - I just do not believe! - http://tgvtgv.snimka.bg/other/platki.472331.17440192 - It is the small black plastic covered transistor (or whatever it is)

Транзистор
СЕРИЯ 2Т(КТ) 602 Б (желтые)
Масса изделия 3,02 ±0,05 г
Драгоценный металл в составе изделия золото
Масса золота в 1 шт. изделия 0,036 г
Соответствие с паспортными данными 42-55 % от паспортных данных
Содержание золота в изделии, % масс 0,5-0,66 %
Элементы изделия, содержащие золото позолота на основании и выводах
Материал основания железо-никелевый сплав
Материал крышки медь
Рекомендация по переработке отправка на медеплавильный завод
Рекомендация по опробованию при однотипных изделиях - выборка, в смеси с другими типами - обжиг и растворение всей партии.

http://www.speedyshare.com/files/20972879/_2t_kt602b.bmp

teclu

 

[Scott2357]

Teclu, is this close translation?
Some things I don't understand, please correct my mistakes.

The transistor
A SERIES 2Т (КТ) 602 (yellow)
Weight 3,02 ±0,05 г
Precious metal gold in structure
Weight of gold for 1 piece 0,036 г
Conformity with nameplate data of 42-55 % from nameplate data
% of gold by weight of 0,5-0,66 %
The elements containing gold are gilding on the base and conclusions
Base material - iron/nickel alloy
Cover material - copper
The recommendation on processing sending on медеплавильный a factory
The recommendation on approbation at the same products - sample, in a mix with other types - roasting and dissolution of all parts.

 

[teclu]

Teclu, is this close translation?
Some things I don't understand, please correct my mistakes.

The transistor
A SERIES 2Т (КТ) 602 (yellow)
Weight 3,02 ±0,05 г
Precious metal gold in structure
Weight of gold for 1 piece 0,036 г
Conformity with nameplate data of 42-55 % from nameplate data
% of gold by weight of 0,5-0,66 %
The elements containing gold are gilding on the base and conclusions
Base material - iron/nickel alloy
Cover material - copper
The recommendation on processing sending on медеплавильный a factory
The recommendation on approbation at the same products - sample, in a mix with other types - roasting and dissolution of all parts.

Yes Scott, your translation is good(conclusions means legs/pins).
This text comes from here www.knfmp.ru, they have sheet of processing to thousands of electronic parts, of course that each of us can check if it's true, I say a big yes.

Excuse me for I not translated the text in english, however I'm not speak russian, actually no the English don 't handle it, but the gold is yellow everywhere...

teclu

 

[Scott2357]

Thanks Teclu. I was tempted to guess conclusions meant legs but not confident in my translations. I learned to speak conversational Russian a few years ago but the alphabet still gives me trouble and sadly I have nobody to practice speaking with.

 

[plamenppp]

KT602 - I just do not believe! - http://tgvtgv.snimka.bg/other/platki.472331.17440192 - It is the small black plastic covered transistor (or whatever it is)

Транзистор
СЕРИЯ 2Т(КТ) 602 Б (желтые)
Масса изделия 3,02 ±0,05 г
Драгоценный металл в составе изделия золото
Масса золота в 1 шт. изделия 0,036 г
Соответствие с паспортными данными 42-55 % от паспортных данных
Содержание золота в изделии, % масс 0,5-0,66 %
Элементы изделия, содержащие золото позолота на основании и выводах
Материал основания железо-никелевый сплав
Материал крышки медь
Рекомендация по переработке отправка на медеплавильный завод
Рекомендация по опробованию при однотипных изделиях - выборка, в смеси с другими типами - обжиг и растворение всей партии.

http://www.speedyshare.com/files/20972879/_2t_kt602b.bmp

teclu

Teclu, this is probably the original factory data. Where do you have it from?