Specifications of the HT2 MOA3 S20

Rev. 1.1

1997-08-19

Ht2moa3.doc/HS

Page 11 of 22

For a rough estimation (

± 10 %) of the number of coil windings following formula can be used.

It is assumed that the winding is done in circular form.

N

L

2U l n (

u

d

)

1, 8 5

=

N

... number of windings

L

... inductance [nH]

U

... average coil circumference [cm]

d

... copper diameter [mm]

u

... average coil circumference [mm]

For fine tuning a measurement of the inductance and an according adjustment of the number of

windings is necessary. This process always needs some iterations.