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previous: Lee How do you read Russian parts?... -- 1124048306

Re: russian parts

8/17/2005 8:58 PM
Enzo	Re: russian parts Let's get real specific. What sort of cap, and what does it say on it? In guitar amps we mostly see electrolytics and film caps with a few disc ceramics thrown in. The 'lytics usually just say 50uf and some voltage. Film and ceramic caps tend to sometimes put the value on it outright, as in "220pf" or if in the microfarad range, something like ".001" A more recent trend is to put the value in picofarads, but use a number scheme like a resistor color code. FOr example a cap marked "102" would be read as 1-0-00. That means 1000pf, also known as a .001uf. 104 then would mean 1-0-0000, 100,000pf or .1uf. COmpare that to a resistor. A 1k resistor has color codes brown-black-red. Those colors translate to 1-0-2 or 1-0-00. In fact if you look on tiny surface mount chip resistors, you will see numbers like 102 rather than colors. As far as I know, Russian parts are numbered the same - they use microfarads, picofarads, and so on just as we do. WIthout tearing apart my SOvtek amplifiers, I might find the same numbers but a couple letters might look funny. In those cases I would usualy infer from the context what I was looking at. Let me invent an example, since their letters don't always mean what ours do. ("H" in Russian is really our N for example, and their "P" is really our R.) If I saw a Russian electrolytic marked 40H 500PP or something, it would be reasonable to assume it was a 40uf/500v cap. Many parts add a date code or a lot number. Again these are usually recognizable by context. FOr example if a row of parts all had numbers like 0244, 0238, 0246 in addition to other numbers, I would assume these were all 2002 date codes from the 44th, 38th, and 46th weks of that year.

8/17/2005 8:58 PM

Enzo

Re: russian parts

Let's get real specific. What sort of cap, and what does it say on it?

In guitar amps we mostly see electrolytics and film caps with a few disc ceramics thrown in.

The 'lytics usually just say 50uf and some voltage.

Film and ceramic caps tend to sometimes put the value on it outright, as in "220pf" or if in the microfarad range, something like ".001"

A more recent trend is to put the value in picofarads, but use a number scheme like a resistor color code. FOr example a cap marked "102" would be read as 1-0-00. That means 1000pf, also known as a .001uf. 104 then would mean 1-0-0000, 100,000pf or .1uf.

COmpare that to a resistor. A 1k resistor has color codes brown-black-red. Those colors translate to 1-0-2 or 1-0-00. In fact if you look on tiny surface mount chip resistors, you will see numbers like 102 rather than colors.

As far as I know, Russian parts are numbered the same - they use microfarads, picofarads, and so on just as we do. WIthout tearing apart my SOvtek amplifiers, I might find the same numbers but a couple letters might look funny. In those cases I would usualy infer from the context what I was looking at.

Let me invent an example, since their letters don't always mean what ours do. ("H" in Russian is really our N for example, and their "P" is really our R.) If I saw a Russian electrolytic marked 40H 500PP or something, it would be reasonable to assume it was a 40uf/500v cap.

Many parts add a date code or a lot number. Again these are usually recognizable by context. FOr example if a row of parts all had numbers like 0244, 0238, 0246 in addition to other numbers, I would assume these were all 2002 date codes from the 44th, 38th, and 46th weks of that year.

Replies:

Lee Interesting. They have on them like... -- 8/18/2005 8:02 PM