making small coils (help)

Hello all dears (geniuses)

fine ??????????
i hope fine.............

i want to make small coiles one is 2.2nH and second is 1nH use in 555 timer based mobile jammer range is 10------15 fit around.

any one ???????????

[Topic moved to Electronics forum]

check this http://www.daycounter.com/Calculators/Air-Core-Inductor-Calculator.phtml

this one is more helpful http://hamwaves.com/antennas/inductance.html

hi khurram

there is a simple equation for the winding,

Wheeler's Formula (single layer air core coils)
L(uH) = (r^2) * (N^2) / (9*r 10*h)
where:
r = coil radius (inches)
N = number of turns
h = coil height (or length) in inches

found from this site
http://forum.allaboutcircuits.com/showthread.php?t=12870

hope this will help you!