**More information to help you
build this J-pole antenna for other frequencies:** |

__5/8 Wavelength Formulas:__
"615" divided by the frequency in Megahertz (this # is
in feet)
(and multiplied by 12 inches) = the free space 5/8
Wavelength in inches
(and then multiplied by the Velocity
Factor %) = electrical
5/8 Wavelength in inches
or
615/MHz x 12 x VF = electrical
5/8 Wavelength in inches |

__1/2 Wavelength Formulas:__
"492" divided by the frequency in Megahertz (this # is
in feet)
(and multiplied by 12 inches) = the free space 1/2
Wavelength in inches
(and then multiplied by the Velocity
Factor %) = electrical
1/2 Wavelength in inches
or
492/MHz x 12 x VF
= electrical 1/2 Wavelength in inches |

__1/4 Wavelength Formulas:__
"246" divided by the frequency in Megahertz (this # is
in feet)
(and multiplied by 12 inches) = the free space 1/4
Wavelength in inches
(and then multiplied by the Velocity
Factor % ) = electrical 1/4 Wavelength in
inches
or
246/MHz x 12 x VF = electrical
1/4 Wavelength in inches |