A502HB & A504HB
50 MHz Yagi Antennas
Specifications
Model: A502HB A504HB
Frequency MHz: 50-53 MHz 50-53 MHz
Gain: 6.3 dBi 10.8 dBi
Power Rating (P.E.P.): 400 W 400 W
Impedance (nominal): 50 Ohms 50 Ohms
Connector: UHF UHF
VSWR (nominal): 1.5:1 1.5:1
Element Phasing: 2 4
Front To Back Ratio: 15 dB 12 dB
Boom Length: 2.5 ft. (750mm) 10.66 ft. (3250mm)
Longest Element: 9.84 ft. (3000mm) 9.84 ft. (3000mm)
Driven Element diameter:
Parasitic Elements diameter:
Max. Mount diameter:
Weight: 3.75 lbs. (1.7 kb) 7.7 lbs. (3.5 kg)
Warranty: 1 Year against defects in material or workmanship.
WARNING
A502HB A504HB
Do not install near electrical power lines. Fatal injuries
or death may incur if antenna touches electrical power
line. Do not tamper with matching network, as this will
void all warranty.
Assembly Instructions
(1) Remove antenna from package and inspect contents to
insure it is complete.
red marking
n
brown marking
n
#050207
gamma match assembly
forward driven element
rear driven element
m #050204 element fasteners
#050201 (2)
#050202 (2)
m #050205
element clamps
n
#050203
boom
yellow marking
n
orange marking
n
red marking
n
brown marking
n
#050410
gamma match assembly
director #2
director #1
forward driven element
#050404 (2)
#050403 (2)
#050401 (2)
rear driven element
#050402 (2)
n #050405 (4) element clamps
m #050406 mounting
clamp & hardware
#050408
element fasteners
m
#050407 boom clamp
m
m
#050206
mounting clamp
A502HB Parts List A504HB Parts List
& hardware
n
#050209
boom elements
(2) Loosen element clamp wing nuts on the Boom and adjust into correct mounting position. (A504HB Only ~ Clamp
Boom sections together with proper mounting hardware.)
element clamp
boom
boom
boom
(A504HB only)
(3) Match elements to element clamps with similar color. Fit elements into mounting clamps so element hole fits through
clamp extension. When elements are in proper position, tighten wing nut.
element clamp
boom
element
element
clamp extension
boom
(4) Install gamma match assembly with red label into position matching red label on boom. Match the hole on Boom with
extension on gamma match assembly and fasten wing nut. Do the same to the other side of gamma match assembly. When
in place, use zip ties to secure cable on boom.
boom gamma match
gamma match
gamma match rod
boom
gamma match
gamma match cable
rod
gamma match
cable
zip tie
boom
(5) Install element fasteners at perforations on gamma match rod. Lightly fasten into position until final tuning adjustment.
perforation on gamma match rod
element fastener
(6) Install mounting clamp to boom and prepare for installation on mast.
boom
2
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