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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: #26 gauge = approx. .018" per wire turn : Diameter = 1.63"  :  Turns = 93  : Length = 1.59" :  Inductance = 247 uh
Inductance (uh)
Estimated Wire Turns:
  (per inch)
  (per cm)
Gauge # US Stand.
S.W.G.
A.W.G.
A.W.G. Metric
Red #30 .0120
0.0124
0.0100
0,2540
Grn #26 .0179
0.0180
0.0159
0,4038
# 22 .0299
0.0280
0.0253
0,6426

<=Values for RS Theremin

 

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.

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