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How to distinguish high-frequency color ring inductors in daily life

How to distinguish high frequency color ring inductors in daily life: it is well known that uh color code inductors can be used in HF circuits. Like the color ring resistance, the unit is uH (the nH level basically has no color ring inductor). The Q value of the color ring inductor is on the low side, so it is not good to use in the high frequency LC circuit. The resistance represented by color ring can be divided into four-color ring and five-color ring.

The four-color ring represents the regulations as shown in the following table:

Color without silver, gold, black, brown, red, orange, yellow, green, blue, purple, gray

The first effective value is 0 1 2 3 4 5 6 7 8 9

The second RMS 0 1 2 3 4 5 6 7 8 9

Multiply the third place by 10-2 10-1 100 101 102 103 104 105 106 108 109

The fourth bit error /% ±20 ±10 ±5

Steps to quickly identify the resistance value of the four-color ring resistance:

The first step

When we get a four-color ring resistance, first look at its fourth color ring, the fourth color ring is generally farther away from the other three color rings, easy to find, and the fourth color ring has only gold and silver colors, or there is no fourth color ring, that is, colorless. The reason to look at the fourth color ring first is not only because its position is special and the color is simple and easy to identify, but also because it will determine the color of the first and second color ring, an important feature determined by the series of nominal values.

How to identify color ring inductance, color ring inductance recognition schematic diagram

Identification of color ring inductor

The first and second rings of the four color rings with power inductor-magnetic ring coil-color ring inductor-patch inductor-bead inductor-transformer-laminated inductor-electronic news represent resistance respectively; the third ring represents magnification The fourth ring is to determine the power inductor-magnetic ring coil-color ring inductor-patch inductor-bead inductor-transformer-laminated inductor-electronic news resistance within a certain order of magnitude according to the color of the third ring. For example, what time is the K, or several dozen K out of the number of "generations" to go, so that the number can be read quickly.

The following are the main points:

(1) memorize the number represented by each color of the first and second rings. Can remember like this, green 5, blue 6, purple 7, gray 8

(2) recording power inductor-magnetic ring coil-color ring inductor-patch inductor-bead inductor-transformer-laminated inductor-electronic news

According to the order of magnitude, there are three big ones in the body, namely: gold, black, power inductor-magnetic ring coil-color ring inductor-patch inductor-bead inductor-transformer-laminated inductor-electronic news brown is thousands of ohms.

(3) this division is to make it easy to remember that the color of the third ring represents integers, that is, hundreds of thousands of k, we should pay attention to. For example, if the third ring is red, its resistance value

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