Air coils winding

[walid1]

in many circuits there is an air coil, they told you that it is say 0.1 uH and also told you number of turns you must made and the former diameter and if this close wound or loose. If i try different values to achieve the same 0.1 uH using some formula, is then this coil operate ok as the previous mentioned.
Thanks.

 

[Alun]

this page will help you with calaculating the number of turns etc.

 

[walid1]

Thank you alun
you don't understand me
what i mean is if i want 100nh air coil and wound it in different way but the same value, is this ok or not
thanks

 

[Alun]

I does depend on how it's wound, a coil with air spaces between the turns is better because it has a lower parasitic capacitance hence a higher self resonant frequency.

 

[1st Mil-Tech]

How its wound will effect the Q of the coil.

 

[walid1]

How the Q of the coil affected by its shape
what is Q of the coil???????????

 

[walid1]

hi friends here are you