Green KM. Containing palladium and platinum. photo of the author. Green KM. Containing palladium and platinum. photo of the author.
Palladium capacitors are among the most expensive among small radio components. In any purchase, they always offer quite good money for them. In the best of times, up to 200 — 230 thousand rubles could be offered per kilogram of such KM-ok collected from old Soviet technology. And even today, depending on the region, green or orange ceramic capacitors give at least 100,000 rubles per kilogram. (I would not recommend rushing to sell palladium capacitors at such prices, the market will soon stabilize and prices will recover).
Due to the high price tag and the rising cost of the precious metal, palladium radio components enjoy a stable and well-deserved interest among radio components assemblers. However, as is often the case, when disassembling another technique, many of us shoot KMs that are in plain sight, completely forgetting that they also happen in more hidden places, for example, in the case of motors from old cassette recorders
Knowing how many palladium-containing CMs were missed as a result of haste and lack of proper experience, I decided to compile my own small list of sort of «secret» places in electronics, opening which we can find capacitors with precious metal.
Motors from old cassette recorders.
KM in the motor from the tape recorder. KM in the motor from the tape recorder.
Unfortunately, I did not have such motors at hand for demonstration. Therefore, the image had to be borrowed from the «Detalius» channel.
Few people know, but in the motors of Soviet-made cassette recorders, when opening the protective cover, you can find one, and sometimes more KM-approx.
By the way, who did not know, KM means «ceramic monolithic.» If you know how capacitors of this type are arranged, then palladium and platinum products can be distinguished even without marking.
Rockets and microassemblies.
Capacitors containing palladium are not only in a green or red case, but without it at all (unpackaged).
Green and orange KM. Obtained by the author by overwork) Green and orange KM. Obtained by the author overwork)
Both are accepted in purchases. At one time, unpackaged KMs were bought even more expensive than capacitors in a case. Their main difference is the absence of a specific protective shell, which is regarded as rubbish in a buyout and, accordingly, reduces the price for radio components. At the same time, the content of precious metal per 1 item remains unchanged.
Microassembly «rocket». Unpackaged Km can be found if you open the red varnish. Missiles in black case. Microassembly «rocket». Unpackaged Km can be found if you open the red varnish.
Unpackaged CMs can be found in chips called «rockets» (they come in red and black cases). They got this name due to the factory logo printed on the radio component and resembling a rocket.
Also, several frameless CMs are present in various microassemblies of the UPCZ-3 type.
Under aluminum contours.
An example of aluminum circuits under which there may be valuable capacitors. An example of aluminum circuits under which there may be valuable capacitors.
When you disassemble dozens of Soviet boards for radio components, you simply don’t pay attention to aluminum circuits. In most cases, only copper coils are hidden under them, so opening each of them is simply not interesting.
However, in fact, under such contours (correct if I call them incorrectly), green KMs can often be found there. They are located there in cases where it is necessary to save space for installing other parts, for example, in car radios, where compactness is almost the main requirement when creating — device development.
On color TVs.
Board from the old Soviet TV. Taken as an example. Photo of the author. Board from the old Soviet TV. Taken as an example. Photo of the author.
In color TVs, in addition to the main boards, KM-ki can be found in the channel switching box, as well as in the block where the connector for connecting the antenna cable is located. Very often, such valuable details are also found in home-made boxes that were installed in TVs by craftsmen during repairs or, for example, as an additional signal receiving unit (reinstallation of the remote control).
Palladium capacitors are probably one of the most profitable Soviet-made radio components, and the loss of even one of them, although not significant, will be noticeable for the wallet. Therefore, before throwing away or scrapping the leftovers, double-check if there are any details that you missed.
Parts made of pure palladium in devices of the USSR with a photo and a description of where they are.