Hy-Gain 5BDQ-S Instruction Manual

INSTRUCTION MANUAL
General Description
The Hy-Gain Model 5BDQ-S is a half-
wavelength doublet antenna for 10, 15, 20,
40, and 80 meters. Matched Hy-Gain Hy-Q
traps allow automatic band switching. The
15-20 meter wire is fanned below the 10-40-
80 meter wire to minimize loading. The
maximum overall length is 93' 8".
To further improve the performance of the
5BDQ-S, a Hy-Gain balun Model BN-86 is
recommended. The Model BN-86 is a broad-
band balun designed specifically for doublet
type antennas. It will balance the input im-
pedance to the
transmission line radiation to increase the ef-
ficiency of a doublet type antenna.
Overall Length
Maximum Wind Survival
Antenna Wire
Frequency Range
Input Impedance
SWR at Resonance
Maximum Power
Cycolac® is a registered trademark of Borg Warner
Alumoweld® is aegistered trademark of Copperweld Bimetallic
Group
antenna and prevent
Specifications
ORDER NO. 383S
Model 5BDQ-S, Doublet Antenna
with Stainless Steel Hardware
Construction
The Hy-Q traps are weather resistant. All
hardware is stainless steel. The center of the
doublet is supported by a yoke-type center
insulator to which the transmission line
attaches. The ends of the doublet are
supported by end insulators constructed of
high impact Cycolac© plastic. The antenna
wire is Alumoweld© #12 which has a
breaking strength of 1200 pounds. It will not
rust or corrode. See "Hints on Handling
Alumoweld© Wire" in the rear of this
manual.
SWR and Feedline
The Model 5BDQ-S antenna is designed for
use with a single 50-ohm coaxial feedline.
The SWR at resonance is 1.5:1 or less on all
bands. Either RG-58/U or RG-8/U can be
used. RG-8/U polyfoam type is reconunended
because of its lower losses and higher power
handling capabilities.
Mechanical
Electrical
93' 8" maximum (48.67m)
80 mph (129 kmph)
Alumoweld® #12
10,15,20,40, and 80 Meters
50 ohms unbalanced
Less than 1.5:1
1 kW AM, 2 kW PEP