VTM-00-009
Rev C
TECHNICAL MANUAL
and
INSTALLATION INSTRUCTIONS
SLOPING VEE
ANTENNA SYSTEM
VD-99-00182-1
Designed and Manufactured by:
Valcom Manufacturing Group, Inc.
Guelph, Ontario, Canada
Valcom Manufacturing Group, Inc.
REVISION SHEET
Revision Description Date
A Original Issue October 30, 2000
i
B - Added mast kit details
- Minor formatting changes
C - Revised details on improved mast kit August 23, 2011
July 11, 2011
Sloping Vee Antenna System Manual
Valcom Manufacturing Group, Inc.
TABLE OF CONTENTS
1.0 INFORMATION
1.1 General Description ...................................................1
1.2 Technical Reference Data ..............................................1
1.3 Electrical Description .................................................2
1.4 Mechanical Description ................................................2
1.5 Scheduled Maintenance ................................................2
1.6 Corrective Maintenance ................................................2
2.0 INSTALLATION
2.1 Unpacking ..........................................................3
2.2 New Site Preparation ..................................................3
2.3 Assembly and Raising .................................................4
2.3.1 Directional Setup ............................................4
2.3.2 Omni-Directional Setup .......................................6
3.0 PARTS LIST
3.1General................................................................8
3.2Additional Materials Required..............................................8
ii
4.0 QUICK REFERENCE DATA
4.1General...............................................................10
4.2Manufacturer’s Address..................................................10
LIST OF TABLES AND FIGURES
1. Table 1.1 : Electrical Properties .............................................1
2. Table 1.2 : Mechanical Properties ...........................................1
3. Figure 2-1 : Drain-hole location ............................................4
4. Table 3.1 : List of parts for the Sloping Vee Antenna System .....................8
5. Figure 3-1 : Illustration of items in Table 3.1 ..................................9
6. Figure 4-1 : Recommended Directional Configuration ..........................11
7. Figure 4-2 : Detail of Load Connection......................................12
8. Figure 4-3 : Detail of Balun Connection .....................................12
9. Figure 4-4 : Detail of Mast Assembly .......................................12
10.Figure 4-5 : Recommended Omni-Directional Configuration.....................13
11.Figure 4-6 : Detail of Insulator Connection...................................14
12.Figure 4-7 : Detail of Balun Connection .....................................14
13.Figure 4-8 : Detail of Load Connection......................................14
14.Figure 4-9 : Typical VSWR plot ...........................................15
Sloping Vee Antenna System Manual
Valcom Manufacturing Group, Inc.
1.1 General Description
The Valcom Model VD-99-00182-1 Sloping Vee Broadband Antenna is designed for
operation from 1.8 MHz to 30 MHz. The antenna comes fully assembled and pre-tuned,
no measuring or cutting is required. A counterpoise wire is supplied for employment
where ground conditions are poor (see installation instructions for details). This antenna
is all weather rated at 500W, 1 kW PEP CW/SSB ICAS1, and permits full use of the
capabilities of today’s continuous coverage transceivers. An added feature is single
feedline operation for the entire band.
1.2 Technical Reference Data
Table 1.1 Electrical Properties
1
1.0 INFORMATION
Frequency Range
Power Rating
Polarization
Radiation Pattern, Azimuth
Input Impedance
VSWR
Feedpoint Connector
Table 1.2 Mechanical Properties
Typical Assembled Height
Typical Assembled Dimensions
Weight
Erection Time
Volume (for storage)
1.8 MHz to 30 MHz
500 W Average, 1 kW Peak
Horizontal and Vertical Simultaneously
Bi-directional or Omni-directional
50 ohm (nominal)
< 2 : 1
Female N-type
25 feet (7.6 metre)
105 ft x 25 ft x 25 ft (32 m x 7.6 m x 7.6 m)
43 lbs (19.5 kg)
20 minutes, two persons
3.4 cu ft (0.10 m
3
)
1
ICAS - International Commercial and Amateur Service
Sloping Vee Antenna System Manual
Valcom Manufacturing Group, Inc.
1.3 Electrical Description
The Sloping Vee Antenna is fabricated with #14 AWG stranded copper-clad stainless
steel wire. It features a high impact resistant balun and matching network. The feedline
impedance of the antenna is 50 ohm and comes equipped with an N-type (female) coax
cable connector.
The antenna is generally mounted in an inverted vee configuration. With the centre of
the antenna rising up to 25 feet off the ground, approximately 100 linear feet of space and
a 50 foot diameter area around the mast, is all that is required for installation. With the
balun at one end of the wire, close to ground level and the terminating resistor at the
other end of the wire, close to ground, a slightly bi-directional radiation pattern results.
An alternative installation method is to mount the balun at the top of the mast with the
terminating resistor centred near the mast and close to ground level. An omni-directional
radiation pattern results from this setup.
1.4 Mechanical Description
2
The antenna is comprised of 112 feet of antenna wire, 112 feet of counterpoise, a highimpact resistant balun and a rugged terminating resistor. When assembled in the
recommended fashion, the antenna has a 25 foot height and runs about 105 feet long.
The mast is guyed with 3 ropes located at two locations along the mast and spans out 25
feet from the mast to create a 50 foot installation diameter.
1.5 Scheduled Maintenance
The antenna is virtually maintenance free. Care should be taken not to bend or kink the
antenna wire or counterpoise when installing or packing antenna.
1.6 Corrective Maintenance
Generally, no corrective maintenance is possible or required. If one of the components of
the antenna are severely damaged, it must be replaced by a new component or have the
antenna replaced completely.
Sloping Vee Antenna System Manual
Valcom Manufacturing Group, Inc.
2.1 Unpacking
The Sloping Vee antenna is packaged within a series of plastic bags all contained within
a canvas duffel bag. Remove all items from the bags and ensure all items are present and
in good condition. A list of supplied materials is found in Table 3.1.
2.2 New Site Preparation
Outdoor antennas and lead-in conductors from antenna to building shall
not cross over electric light or power circuits and shall be kept well away
from all such circuits so as to avoid the possibility of accidental contact.
Where proximity to electric light or power service conductors of less than
250 volts can not be avoided, the installation shall be such so as to provide
a clearance of at least 2 feet. Where practical, antenna conductors shall be
installed so as to not cross under electric light or power conductors.
3
2.0 INSTALLATION
WARNING
Determine how and where the antenna will be installed. Study all of the illustrations
(Figures 4-1 to 4-8) to determine which installation best fits your individual requirements.
Trees, sides of buildings, utility poles, etc. make good supports. Supports may be
conductive such as a metal pole, but be certain to use insulators to keep the antenna wire
from making contact.
The antenna may be set up in shapes other than those shown, or shortened, with minimal
effect on the bandwidth. However, the radiation efficiency at the lower frequencies will
be reduced somewhat.
DO NOT INSTALL PARALLEL TO POWER LINES.
For directional applications, the maximum gain of the antenna will generally be in the
direction from the balun to the resistor. When the bearing of the intended receiver is
known, care should be taken to orient the antenna in this direction this is me.
Sloping Vee Antenna System Manual
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