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Why is oxygen-free copper so good?
Pure copper without oxygen and without any deoxidizer residue. The appearance of copper oxide at the grain boundaries in the form of inclusions has a negative impact on the toughness of the material. The oxygen in oxygen-free copper is very low, so this copper
The hand structure is a homogeneous single-phase structure which is good for toughness.

1. With the same number of turns and volume, the "inductive reactance" value of the hollow inductor is much lower than the solid inductor;
The hollow inductor is more suitable for ocns with a wide frequency, while the solid inductive reactance has a serious frequency tendency;
That is, the hollow inductive reactance allows most audio or audio to pass, while the solid inductive reactance is selective, allowing only a portion to pass;

2. The two inductive reactants are used because of the need for audio and / or audio;
In the frequency divider, hollow inductive reactance is generally used in the front stage, and theoretically allows 20 to 20KHz audio to pass through;
After the frequency division, only 20 ～ 1KHz, 1K ～ 10KHz, 10 ～ 20Hz and so on are allowed to pass through the audio signal after “frequency division” in order to achieve the purpose of frequency division output.


Package:1PCS.