The Columbia Amateur
RADIO SOCIETY

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SPOTTER ACTIVATION IS NOT REQUESTED AT THIS TIME. 		 
 
Antenna Calculator
This will calculate the length of a 1 wavelength loop.
Frequency in
Megahertz
Length of loop

This will calculate the length of a half wave dipole.

Frequency in
Megahertz
Length of half wave
length wire in feet

This will calculate the length of a 5/8 wave vertical with 1/4 wave radials.

Frequency in
Megahertz
Length of 5/8 wave
vertical in feet

Length of 1/4 wave
radials in feet

This will calculate the length of a delta loop.
This antenna is a triangle shape with L1=top; L2 and L3=sides.
It should be feed with a 4:1 balun.

Frequency in
Megahertz
Length of L1
in feet;
Length of L2 and
L3 in feet

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