RF FORMULAS

TO FIND WAVE LENGTH YOU TAKE -

300 / FREQUENCY = WAVE LENGTH IN METERS

936 / FREQUENCY = WAVE LENGTH IN FEET

(FOR EXAMPLE 300/146MHz = 2 METERS)

ANTENNA WAVE LENGTHS

STANDARD INCHES AND FEET SIZES

F = FREQUENCY

117/F = 1/8 WAVE  120/F = 1/8 WAVE GROUND RADIALS

234/F = 1/4 WAVE  240/F = 1/4 WAVE GROUND RADIALS

468/F = 1/2 WAVE  480/F = 1/2 WAVE GROUND RADIALS 

585/F = 5/8 WAVE  600/F = 5/8 WAVE GROUND RADIALS

787/F = 7/8 WAVE  840/F = 7/8 WAVE GROUND RADIALS

936/F = 1 FULL WAVE   960/F = FULL WAVE GROUND RADIALS

METRIC SIZES

F=FREQUENCY

37.5/F = 1/8 WAVE

75/F = 1/4 WAVE

150/F = 1/2 WAVE

178.308/F = 5/8 WAVE

262.5/F = 7/8 WAVE

300/F = 1 WAVE LENGTH

METRIC CONVERSION 

1 METER = 39.37 INCHES = 3.28 FEET

2.54 CENTIMETERS = 1 INCH 

PLEASE NOTE... THESE FORMULAS ARE VERY ACCURATE BUT, ANTENNAS STILL MAY NEED SOME TUNING DUE TO GROUNDING AND IMPEDANCE ISSUES. ALSO IT IS A GOOD IDEA TO USE WIRE LARGER THAN #12 GAUGE. THICKER THE WIRE THE BETTER. 

OHMS LAW

I = CURRENT = AMPERAGE

E = VOLTAGE

R = RESISTANCE = OHMS

P = POWER = WATTAGE

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I = E / R

E = I X R

R = E / I

P = I  X E

I = P / E

FOR EXAMPLE

12 VOLTS / 2 OHMS = 6 AMPS

12 VOLTS X 6 AMPS = 2 OHMS

2 OHMS X 6 AMPS = 12 VOLTS

12 VOLTS X 6 AMPS = 72 WATTS