TECHNICAL MANUAL VTM-98006F OPERATION AND INSTALLATION INSTRUCTIONS HF BROADBAND ANTENNA MODEL VBBA 2-30 Valcom Limited 175 Southgate Drive, P.O.Box 603, Guelph, Ontario, Canada N1H 6L3 Tel: 519-824-3220 Fax: 519-824-3411 Web Site: www.valcom-guelph.com Email: enquiries@valcom-guelph.
VTM-98006F RECORD OF CHANGES CHANGE NUMBER DATE TITLE OF BRIEF DESCRIPTION ENTERED BY -- Jan 2001 - Original Issue H.D. -A- May 2002 - Added additional cable and connector information - Fixed minor typing errors J.S. -B- Sept 2002 - Deleted reference to LC-N type and 7/8" Heliax adapters as being included - They are options to be ordered separately by the customer J.S. -C- Nov 2003 - Added detail to Figure 4-1 J.S. -D- Aug 2006 - Change to 7/8 EIA Connector and related parts HD..
VTM-98006F Table of Contents Section Page 1 GENERAL INFORMATION AND SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . 1 1-1 General Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-2 Specific Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1-3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VTM-98006F LIST OF ILLUSTRATIONS Figure 1-1 4-1 Page Antenna VBBA 2-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installation Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 LIST OF TABLES Table 1-1 1-2 4-1 Page Reference Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Equipment and Documents Supplied . . . . . . . . . . . . . . .
VTM-98006F SECTION 1 GENERAL INFORMATION AND SAFETY PRECAUTIONS 1-1 GENERAL SAFETY PRECAUTIONS. The following general safety precautions are not related to any specific procedures and therefore do not appear elsewhere in this publication. These are recommended precautions that personnel must understand and apply during many phases of operation and maintenance. WARNING Keep away from live circuits.
VTM-98006F 1-3 INTRODUCTION. This manual provides general information, operating and functional description, and installation data for Valcom's VBBA 2-30 broadband antenna. 1-4 EQUIPMENT DESCRIPTION. The VBBA 2-30 Broadband Antenna (see figure 1-1) is a whip antenna for general use with HF communications equipment. The antenna provides vertically polarized, omnidirectional azimuth radiation from 2 to 30 MHz when the antenna is operated with a HF transceiver.
VTM-98006F Figure 1-1 Antenna VBBA 2-30 3
VTM-98006F Table 1-1 Reference Data PARAMETER SPECIFICATION Nomenclature Antenna, VBBA 2-30 Manufacturer 35736 Frequency Range 2-30 MHz VSWR 2.0:1 Maximum Polarization Vertical Power Rating 3 kW Azimuth Coverage Omnidirectional Input Connection 7/8 EIA Flange (see Note 1) Temperature -50ºC to 65ºC (-60ºF to 150ºF) Wind Velocity 140 mph (224 kph) Humidity 0 - 100 % Shock MIL-S-901C Grade A Vibration MIL-STD-167-1 Type 1 NOTES: 1.
VTM-98006F NOMENCLATURE OVERALL DIMENSIONS (INCHES) QTY CRATED HEIGHT 1 ANTENNA VBBA 2-30 P/N VD-97-00061-1 1 TECHNICAL MANUAL FOR VBBA 2-30 ANTENNA VTM-98006 1 DC-4 ELECTRICAL INSULATING COMPOUND 9 MS24693-C140 3/8-16 X .
VTM-98006F OPERATION 2-1 INTRODUCTION. This chapter provides operating instructions for the antenna. 2-2 CONTROLS AND INDICATORS. The antenna contains no controls or indicators. 2-3 OPERATING PROCEDURES. 2-3.1 Operator Turn-On. No operator turn-on procedures apply since no power is required to operate the antenna. However, the antenna is coupled to RF equipment (transmitter/receiver) and to associated systems which may require energizing.
VTM-98006F SECTION 3 FUNCTIONAL DESCRIPTION 3-1 FUNCTIONAL DESCRIPTION. The VBBA 2-30 Broadband Antenna is a base mounted, high-power antenna which provides omnidirectional coverage for general purpose communications use from 2 to 30 MHz. The antenna consists of a radiating element, and a fibreglass base insulator/mounting flange. The radiating element tapers from approximately 8.25 inches in diameter at the insulator to 2.17 inches at the top.
VTM-98006F SECTION 4 INSTALLATION 4-1 SITE INFORMATION. Valcom's VBBA 2-30 HF Antenna is designed primarily for shipboard installation. The antenna can also be used at shore installations. The antenna should be installed in a non-obstructed environment, clear from any contiguous structures, such as masts, bulkheads, or other metal objects. 4-2 TOOLS AND MATERIALS REQUIRED. No special tools and materials are required for installation. 4-3 UNPACKING AND REPACKING.
VTM-98006F e. Carefully lift the antenna to its mounting platform. Align the mounting holes of the base flange with the mounting holes in the platform. f. Secure the antenna to its mounting plate with using eight 5/8-11 hex head cap screws, flatwashers (two per bolt required), split lockwashers and nuts. Bolt length will be determined by the installing activity. g.
VTM-98006F Figure 4-1 Installation Data 10
VTM-98006F 5.0 MAINTENANCE 5.1 Scheduled Maintenance The antenna is virtually maintenance free. The external finish is a silicone alkyd paint. The minimum finish life before showing signs of deterioration should be at least six years under normal climate conditions. When used in salt-water environments, it is recommended to wash the antenna base with fresh water to remove any build-up of dried salt residue. This should be performed on a monthly basis or after prolonged exposure to sea-spray.
