<= back

The RS Theremin Coil Calculator

Single Layer Air Coil Inductance Calculator (micro Henries = d2 * n2 / ( 18d + 40l )
d = Coil diameter (in), n = Number of turns, l = Coil length (in)

  • The default values shown are those used in the inductance example .
  • Select what you want to solve for, then fill in the other values and press SOLVE.
  • Use the VARY boxes to automatically vary parameters during solve.
  • Note: Calculations produce minor floating-point round off errors.
Solve for: Vary Low - High
Coil Diameter (d)
Number of Turns (n)
Coil Length (l)

 Coil Wire: 30 gauge = approx. .012" per wire turn : Length = 1.12" : Diameter = 1.375"  :  Turns = 100  :  Inductance = 270 uh
Inductance (uh)
Estimated Wire Turns:
  (per inch)
  (per cm)
Gauge # US Stand.
S.W.G.
A.W.G.
A.W.G. Metric
30 .0120
0.0124
0.0100
0,2540
26 .0179
0.0180
0.0159
0,4038
22 .0299
0.0280
0.0253
0,6426

 

LC Tuned Circuit Resonant Frequency Calculator

There is an extra 35 pf circuit capacitance you need to add-in with your cap. value.

Capacitance:
Inductance:
Resonant Frequency:

Type in the L and C values, selecting the units you wish to use and click on the calculate button.

Visit the
Wavelength Calculator

.