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TM 9-2320-356-BD
Section III.
TRANSMISSION ANTENNAS
15-7.
GENERAL
Antennas for transmitting have properties different from receiving-only antennas.
Any 9-foot antenna (e.g., CB antenna) can be adapted for use.
Frequency sensitive lengths and resistances must be adjusted using exact length
wires (elements) or a matching unit.
Antenna resistance also affects the direction
of transmission and the loading of the transmitter final stages.
Resistance requirements can be met by connecting lower resistance value resistors,
end-to-end (in series),
until the desired resistance value is obtained.
2 0 0 O H M S +
2 0 0 O H M S +
200 OHMS = 600 OHMS
Wattage requirements can be met by connecting lower wattage resistors side-by-side
(in parallel ) until the desired wattage is obtained.
1800 OHMS
= 600 OHMS
15-6
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