Post updated: Aug 1, 2020
In order to find a few milligrams of gold , it is not at all necessary to go to its deposits - you just need to look in the attic or dig around in the garage. Surely you can find several old radio components there, which can serve as a source of precious metal. Gold can be found in considerable quantities in Soviet-style radio components.
Many Soviet-era radio components contain gold.
MICROCIRCUIT IN CERAMIC CASE
- KM155TM7
- KM 555TM2
- AOD109A; ZOD109A
- (K)1NT251,661;2TS622B
- 1LB337; 1DR331; 1TK331
- 564 LA7, LE5, TM2, LN2
- 132 RU1
- 564 PU 4
- 564RU2(KP1)
- 537 RU2
- 169UL1
- 142 EH2B; KND1(5)
- K565RU2;K507RU1
- K565RU1
- 556 RT 5A
- 556 RT 7A
- Series 286
- 133IR13
- (K)505RES
- K573 RF5(2)
- KS 573 RF2
- KM 804
- K1ZhG 451
- K5ID011
- 543 KNZ
- 2TAK291B
- K2IE301 B; 2IE302B
Conditions for accepting parts
We accept radio components in any condition, in any quantity. There are several ways to send electronic components or equipment:
Download the price list to see current prices. You are guaranteed to receive payment for your find on the card of any bank in Ukraine.
« Components in radio components
Microcircuits, types, purpose »
MICROCIRCUIT IN A METAL CASE
- Series 122 UN(UD)
- (K) 140UD1A(3),UD1A
- 140 UD 6A;UD 6A
- 140UD7.UD7
- 521 CA2,3
- 723 V
- TESLA MAA 723
- TESLA MAA 723 (without gold plated)
- 2 N 290 4A
- 217 NTZ
- 217LB2A; 217KTZ (with gold-plated cover)
- K814KN 1 B
- KTS 613 (A,B) 2TS 613 (A,B) with gold plated base
- 2TS (KTS) 613 A, B
- 1TS609B
- K284 UD; 284UE1
- 263 UI1
- 228 UV 2, 4; K228 UV 4 (with gold-plated base)
- 228(K) UV 2; 4
- K816UD1A, 2A(V,G)
- K298FN8, 10, 16
- K 223 TK 1
- K817EN 1A(2A)
- KMP 817 EN 4B (ZB)
- KMP817UD6
How to extract gold from radio components
Let's try to figure out how to extract gold from radio components . The solvent for the precious metal is a mixture of hydrochloric and sulfuric acids. The proportions are 3 to 1, respectively. Liquids of a certain density must be mixed.
The indicator of sulfuric acid should be 1.8 grams per cubic centimeter, hydrochloric acid - 1.19 grams per cubic centimeter. The separation of gold from the base will not be complete unless the solution is heated to 60, 70 degrees Celsius.
Only the part should be lowered into the hot mixture. Afterwards, add a small amount of nitric acid to the container. The resulting solution is known as “aqua regia.” It dissolves almost all elements, including gold. The microcircuit, or other element, will melt in the mixture, which should then be precipitated with a reducing agent.
The number of radio components and the content of valuable raw materials in them should be taken into account. Typically, 200–300 grams of gold-plated surface requires one and a half liters of nitric acid. The equipment should be disassembled as much as possible, glass elements and areas without precious coating should be separated.
They will “take” the chemical solution onto themselves, and then more of it will be needed. It is advisable to lower only the parts themselves with yellow metal into the medium.
At room temperature, without heating, metal can be isolated from a mixture of acids by electrolysis. It is only suitable for working with copper and brass parts. A current with a density of 0.1 to 1 A/dm2 is passed through the solution. Lead or iron is used as the cathode. The gold separation procedure is completed if the current strength begins to drop sharply.
You can buy ready-made compositions for separating precious metals in special stores. It is also possible to establish cooperation with small chemical industry enterprises. Many Internet sites also offer reagents and deliver products to your home. The methods for extracting gold from radio components described above are applicable at home.
MICROCIRCUIT IN PLASTIC CASE
- Series K 131
- Series K 155
- Series K 155, 155 (poor)
- Series K 155 (with duralumin backing)
- Series K 155 (large)
- Series K 158
- Series K 500; 500
- Series K 500 (poor)
- Series K 531
- Series K 531 (with duralumin backing)
- Series K 555; (IR 22.23) (with duralumin backing)
- Series K 555
- Series K 555 TM 8(9)
- Series K 556 (large with duralumin backing)
- Series K 561
- Series KR 565
Which radio scrap is easiest to hand over?
A fairly large number of parts and circuits contain precious metals, which is why they are of great interest to collection points.
| Microcircuits | A fairly large part of the microcircuits contains gold at the terminals between the ceramic and plastic. |
| Transistors | Most often they have a gold base, which can significantly increase reliability. |
| Military radio capacitors | Such radio components contain a significant amount of gold and silver. |
Radio components contain the most silver, since this metal protects the terminals from corrosion, which is why it is sprayed onto connectors, relays and capacitors.
Parts containing rare materials are also of great value. For example, some high-capacity electrolytic capacitors contain tantalum. In the Soviet Union, platinum was used in the manufacture of thermocouples. In practice, you can find an even wider list of valuable metals.
TRANSISTORS
- 2T(KT)117 G
- 2T 203 (A, B)
- KT 203 B
- 2T208(A, B, V, D)
- KT3102A, B, G
- 2T(KT)3117A
- 2T312V
- KT312V
- 2T312B
- KT312B
- KT 312 B (yellow)
- 2T313(A, B)
- KT313A, B
- 41 C 8
- KT501 I
- KS 508
- BSAR 77 A
- WE WN (imported)
- ZEX2 (5, 7) (imported)
- 2U(KU)101 (A, B, E, G)
- AOT110A
- P 309
- KT 505 series
- Series 2T6 551
- KT(2T)603(A,B)
- 2T 603 A (white)
- KT(2T)608(A,B)
- KT 608 B (white)
- 2T 635 A
- 2Т6 821
- 2T831 B(830 B)
- TESLA KRU 18 (imported)
- TESLA KRU 18 (imported)
- TESLA KF 508 (imported)
- TESLA KF 517 (imported)
- SSY 20 V (imported)
- SF 129 C (imported)
- SF129C (imported)
- SF129C
- MP 13, 14, 15,20,21,26
- 1T308(A, B, C)
- 1T403G(GT403G)
- P416A
- 2T(KT) 602 B (yellow)
- 2T(KT) 602 A, B (white)
- Series 13В44.87ХЗ, 19С17
- KT 909 B
- KT(2T)914A
- Transistors in a metal-plastic case
- Series 800
- Series 900
- Transistors
Features of radio components containing precious metals
Before you start searching for the necessary radio scrap, you need to understand all the microcircuits that may contain precious metals. It is worth understanding that they all differ in size, weight, as well as functional tasks, since they are all part of the control system of various devices.
The microcircuit itself is a component consisting of a special case and legs, and the exact number of legs, their shape, size and weight determine the cost of this product.
Scrap radio components have recently spread in a similar way to the trade in antique coins. Experts pay a lot of attention to studying these categories of goods, comparing a specific sample with available photographs. The final cost of a product is almost always determined individually, and its size is determined by degree. Similarities with existing samples.
Used relay with silver
The formation of cost becomes most difficult for closed-type microcircuits, where the gold plating is located inside. This complicates the procedure for determining the total amount of gold and its value. Here a more detailed analysis and study of each component is performed.
In addition to microcircuits, capacitors have a fairly high content of precious metals. However, it is important to note here that technological progress leads to a general decrease in the amount of precious metals in it. Most of all in this area of radio engineering, platinum and palladium were used in the form of sputtering or solid elements.
All capacitors, depending on their design, can be divided into a number of main groups:
- Ceramic capacitors. A wide range of capacitors, which includes the green and red KM series, as well as Bulgarian capacitors. The price here varies significantly depending on the specific label.
- Capacitors in an iron case. This category includes ETO, K53, ETN and K52.
- Capacitors in a silver case.
- Capacitors in tantalum housing.
The third most common category of radioelements containing precious metals are resistors. In most cases, resistors are accepted individually; silver, gold or palladium are often hidden under their shell. In this case, the resistor terminals may be silver-plated. The main problem here is that the silver content may drop due to soldering. The final cost of the product is determined after determining the remaining weight of silver.
RELAY
- RES 6
- RES 9
- RES 10
- RES 15
- RES 22
- RES 32
- RES 34
- RES 44
- RES 47
- RES 48
- RES 49
- RES 54
- RES 55; RES 64
- RES 59
- RES 60
- RES 78
- RES 80
- RPS11/5
- RPS18/7
- RPS32B
- RPS34A
- RPS42B
- RPV 2/7
- RP4, RP5, RP7
- RGK15
- REC 23
- PPI
- RKM 1
- R154POT
- DP12
- REN 33
RESISTORS
- OMLT type
- MLT type
- Type RPM-2
- Type C2-10
- Type S2-23
- Imported resistors type MLT
- ULI type
- Aircraft type
- Resistors
- Type MMT-4
- Variable resistance type SP5-3, SP5-2
- Variable resistance type SP5-2
- Variable resistance type SP5-2V
- Variable resistance type SP5-2; SP5-2M (plastic case)
- Variable resistance type SPZ-39A (plastic case)
- Variable resistance type SP5-1VA
- Variable resistance type SP5-14
- Variable resistance type SP5-14 (plastic case)
- Variable resistance type SP5-15
- Variable resistance type SP5-22-1 W (plastic case)
- Variable resistance type SPZ-37A-1
- Variable resistance type SP5-16VG-0.05 W
- Variable resistance type SP5-16VA-0.25 W
- Variable resistance type SP5-16TA(VA) 0.5 W
- Variable resistance type SP5-16 VA(TA) 1 W
- Variable resistance type SP5-16VB-0.25 W (metal case)
- Variable resistance type SP5-16VB-0.5 W
- Variable resistance type TESLA WKC7911
- Variable resistance type PPZ
- Variable resistor PPB-18
- Variable resistance type SPZ-9A
- Variable resistance type SP-2-2-10
- Variable resistors
Connectors for scrap
Connectors, like microcircuits, contain a large amount of precious metals, the cost of which is determined solely by weight. When accepting electromechanical devices for scrap radio components, buyers take into account the following factors:
- Production: domestic, imported.
- Products of the Soviet period, year of production.
- Usage: used, new.
Experts have determined that per kilogram of resistors made in the USSR, there are 25 grams. precious metals. In European analogues it is five times less.
The requirements for connectors are minimal. Elements can be with wires, disassembled to metal rings, with or without a board. In demand: RPPG, RS, ONP, RPPM, SNO, SNP, SNTs, ShR.
