Hy-Gain AV-12AVQ User Manual

308 Industrial Park
Starkville, MS 39759 USA Ph:
(662) 323-9538 FAX: (662) 323-6551
AV-12AVQ
Triband HF Vertical
10, 15, 20-Meter
INSTRUCTION MANUAL
General Descri
p
tion
This vertical antenna is designed for operation
on 10, 15 and 20 meters. It is designed to
work against earth ground or a radial ground
system. When used in conjunction with a
resonant radial system, the vertical antenna
becomes very efficient with a low angle of
radiation and excels in DX communications.
A simulated radial ground system (Model 14
RMQ, Order No. 184) is available from your
Hy-Gain dealer. This manual tells you how to
construct your own radial system. The
12AVQ-S now features stainless steel
hardware for all electrical and most
mechanical connections.
NOTE: If you mount the antenna, then find the
roof space is too small for the radial system,
you can droop the radials over the roof at
almost any angle without seriously changing
the performance of the antenna.
WARNING
When installing your system, take extreme
care to avoid any accidental contact with
power lines or overhead obstructions.
Failure to excise this care could result in
serious or fatal injury.
Construction
It is designed to fit a 15/8" mast. A 11/4"
plumbers pipe has a 1 5/8" outside diameter
and is highly recommended for masting
material. This is the-- minimum roasting
material which will meet the severe weather
survival specifications of this antenna. The
warrant
y,
is void if a li
g
hter mast is used.
The Model 12AVQ-S is made of high quality
seamless aluminum tubing for maximum
strength. The Hy-Q traps are durable and
hi
g
hl
y
weather resistant.

Hy-Gain AV-12AVQ Specifications

General

Type	Vertical
Elements	1
VSWR	1.5:1
Impedance	50 Ohms
Wind Survival Rating	80 mph
Weight	9 pounds (4.1 kg)
Radials	4
Power Rating	1500 Watts PEP

Summary

General Description

Safety Warning: Power Lines

Extreme care during installation to avoid contact with power lines or overhead obstructions.

Antenna Construction

Mast Material Warning

Using a lighter mast than specified voids the antenna warranty and may not meet survival specifications.

SWR and Feedline

Band Setting Caution

Do not adjust one band for Phone and another for CW; all bands must be set for CW or Phone.

Assembly and Installation

Tubing Clamp Installation

Details the process of selecting and installing tubing clamps for antenna elements.

Radial Corrosion Caution

If copper is used for radials, solder lugs must be used to prevent dissimilar metal corrosion.

Grounding and Radial System

RF Hazard Warning

Keep antenna out of reach of children or pets; radials are hot with RF proportional to operating power.

Final Antenna Adjustment

Amateur Phasing Engineering Report

Introduction to Phased Arrays

Hy-Gain verticals are well adapted for phasing arrangements; discusses models 18HT-S and 18AVT/WB-S.

Vertical Array Models

Details models 18HT-S, 18AVT/WB-S, 14AVO/WB-S, and 12AVO for phased arrays.

Phased Array Description

Discusses the need for antennas with power gain and directivity at low frequencies due to QRM.

Single Band Bi-Directional Arrays

Details the theory and operation of bi-directional phased vertical arrays for single band use.

Array Pattern Specifications

Provides specifications for broadside and end fire radiation patterns of phased arrays.