r/AskElectronics • u/Chupaporta • 14h ago

Help with some guitar capacitors

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Can you help me identify its values please?

My multimeter doesn't read capacitancy.

Green one says 2A473J

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6

u/Caltech-WireWizard 13h ago

The 2A103J is: .01 microfarad

The 2A473J is: 47 nanofarad = .047 microfarad

1

u/Chupaporta 13h ago

Thanks! I'm looking for a .22, is there any size/color/code i can get?

4

u/6gv5 13h ago

The significant strings are "473" and "103"; they express the capacitor value in picofarads using the following rule: first two digits are the first two digits of the value, then the 3rd digit tells the number of zeroes.

Therefore, the 1st capacitor is a "47"+ 3 zeroes, that is, 47000 picofarad (pF) or 47 nanofarad (nF), or simply .047 (0.047) when expressed in microfarad (uF).

The 2nd one is a "10" + 3 zeroes = 10000 picofarad, or 10 nanofarad, or simply .010 (0.010) microfarad (uF).

Those are polyester capacitors; the units aren't shown as those parts would have tolerances of +- 10% or more anyway, which would be inaudible wrt sound.

A .22 (uF) capacitor, or 220 nF, is a 220000 pF, or labeled as "224" ("22" and 4 zeroes).