iSlideRule Scales - H
"H" Scales
H
The H scale is used in electronics calculations for the resonant frequency of a circuit.  It is effectively a folded BI scale with the fold at 1 / (2π).

Formula: H = 1 / ( 2π² × X² )
H1
The H1 scale provides a rapid means of calculating the square root of 1 + the square of the value on the C scale.  H1 runs from 0.1 to 1.0 on the C scale, and is normally located on the top or bottom rule.

Formula: H1 = √( 1 + X² )
H2
The H2 scale provides a rapid means of calculating the square root of 1 + the square of the value on the C scale.  H2 runs from 1.0 to 10.0 on the C scale, and is normally located on the top or bottom rule.

Formula: H2 = √( 1 + X² )

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