Hi guys

Just wondering, in most of the audio amp circuits I looked at for the last few dayts, 2.2uF 220nF 47uF 4.7uF 470nF etc caps are used all the time, why these values??

 

No paticular reason, just coincidence.
E3 values are 1, 2.2, 4.7.

E6 values are 1, 1.5, 2.2, 3.3, 4.7, 6.8

Or if you prefer
10, 15, 22, 33, 47, 68.

 

No paticular reason, just coincidence.
E3 values are 1, 2.2, 4.7.

E6 values are 1, 1.5, 2.2, 3.3, 4.7, 6.8

Or if you prefer
10, 15, 22, 33, 47, 68.

What's E3 and E6, some sort of standard for cap values?

 

https://en.wikipedia.org/wiki/E_series_of_preferred_numbers