Online Calculators

Following are links to my online Javascript based calculators:

Inductance:

Single Layer Coil on a Round Form

Single Layer Coil on a Rectangular Form

Multi Layer Coil on a Round or Polygonal Form

Mystery (Crystal Set) Bifilar Coil

Miscellaneous – Radio:

Simple L/C Resonance - Given any two of Inductance, Capacitance or Frequency, Calculates the unknown third value at resonance.

Bandspread – L/C Resonance Calculates the required padder and trimmer capacitor values for a given tuning range.