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Summary of Contents for Hy-Gain DIR-73
- Page 1 DIR-73K Discoverer 73 Director 40-Meter Kit for DIS-72 Instruction Manual 308 Industrial Park Road Starkville, MS 39759 USA PH: 662-323-9538 FAX: 662-323-6551...
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Page 2: Table Of Contents
TABLE OF CONTENTS Page General Description .......…................1-1 Specifications …........................1-1 CHAPTER 2 - PRE-ASSEMBLY Preparation for Assembly .....................2-1 Discoverer 7-2 Disassembly Information ................2-1 CHAPTER 3 - ASSEMBLY Assembly of the Boom-to-Mast Brackets and Boom............`..3-1 Element-to-Boom Brackets.....................3-1 Assembly of the Driven Element...................3-3 Installation of Tubing Clamps ....................3-5 Assembly of the Reflector Element ..................3-7 Assembly of the Director Element..................3-8... - Page 3 LIST OF ILLUSTRATIONS Figure Assembly of Boom Tubes to Casting-to-Boom Bracket and Boom-to-Bracket Clamp ................3-2 Element-to-Boom Brackets .................. 3-3 Assembly of the Driven Element................3-4 Tubing Clamps...................... 3-5 VSWR Charts ....................... 3-6 Front-to-Back Ratios .................... 3-6 Assembly of the Reflector Element ..............3-7 Assembly of the Director Element................
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Page 4: General Description
The Discoverer 7-3 incorporates the principles of contains all of the necessary parts and instructions linear-loading which results in lower loss and to convert the Hy-Gain Discover 7-2, 2 element, greater radiation efficiency than is possible with 40 meter beam into a Discoverer 7-3, 3 element, loading coils when used in shortened elements. - Page 5 *Gain and front-to-back figures verified by computer modeling using the MININEC-3 and NEC computer codes along with actual measurements on Hy-Gain's antenna range.
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Page 6: Chapter 2 Pre-Assembly
CHAPTER 2 PRE-ASSEMBLY INFORMATION after assembly. Check the tightness of ALL Preparation for Assembly hardware after assembly. FOR OUR OVERSEAS CUSTOMERS: The United States uses American units of If you have already assembled the Discoverer measurement. If you use the Metric System, 2, and are now adding the Discoverer Director Kit, allow least 2 hours for... - Page 7 The driven element-to-boom clamp should be The casting-to-boom bracket and boom-to- loosened so that the driven element can be bracket clamp (Item Nos. 2 and 3 of Figure 1 removed from the boom end. The element-to- in the Discoverer 7-2 manual) with their boom clamp and beta match assembly should hardware should be loosened and the two disassembled...
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Page 8: Chapter 3 - Assembly
CHAPTER 3 ASSEMBLY Element-to-Boom Brackets Assembly of the Boom-to-Mast To save time, loosely assemble ALL of the Brackets and Boom element-to-boom brackets their Refer to Figure 1 and begin as follows: appropriate hardware before beginning further installation of the antenna. See Figure 2. The Select the casting-to-boom bracket and different sized brackets can be identified by a boom-to-bracket clamp (Item Nos. - Page 9 Figure 1 Assembly of Boom Tubes to Casting-to- Boom Bracket and Boom-to-Bracket Clamp...
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Page 10: Assembly Of The Driven Element
NOTE: ASSEMBLY HARDWARE FOR THE DRIVEN ELEMENT BRACKET IS THE SAME AS USED ON THE REFLECTOR BRACKET. DIRECTOR/REFLECTOR DETAIL DRIVEN ELEMENT DETAIL Figure 2 Element-to- Boom Brackets NOTE: If you are adding the Discoverer 7-3 Assembly of the Driven Element Director Kit to a preassembled Discoverer 7- Select the parts as listed in Figure 3 and as- 2, then you only need to readjust the DE5... -
Page 12: Installation Of Tubing Clamps
Installation of After adjustment of the tubing lengths, tighten Tubing Clamps the clamp with a 5/16 inch nut driver, socket, or open end wrench until the tubing will not Select the proper size tube clamp as shown in twist or telescope. the chart. -
Page 14: Assembly Of The Reflector Element
Assembly of the Reflector Element R1 (Item No. 10) is inserted completely into the element-to-boom brackets. Select the parts listed in Figure 7 and assemble them as shown. Before tightening R1 (Item No. 10) is positioned with the small the hardware, make sure that: holes up and down. -
Page 15: Assembly Of The Director Element
Tighten the anchor bolts (Item No. 28) last. Assembly of the Director Element This will ensure that the element will not slip Select the parts listed in Figure 8 and on the boom. assemble then as shown, Before tightening the hardware, make sure that: Refer to Figure 4 for compression clamp iden- tification and assembly information. - Page 16 Figure 8 Assembly of the Director Element...
- Page 17 Figure 9 Overall View of Antenna...
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Page 18: Driven Element, Reflector And Director Linear-Loading Wire Assembly
Start assembling the LLW sections to the ele- Driven Element, Reflector and Director ment, beginning at the 40 meter insulators. Linear-Loading Wire Assembly Position the tubing clamp (Item 42) as close as Select the parts listed in Figure 10. Assemble possible to the 40 meter insulator as shown in the linear-loading wire assembly as shown in Detail A, Figure 11. - Page 19 Figure 11 Attachment of Linear-Loading Wire Assembly Near Insulator...
- Page 20 Figure 12 Identification of Linear-Loading Wires (LLW)
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Page 21: Beta Match Assembly
Beta Match Assembly Select the parts listed in Figure 13 and Detail A and assemble them as shown. After attaching your coax cable to the feedpoint, tighten all hardware securely. NOTE: Do not allow the beta rods to touch the element-to-boom bracket. Figure 13 Beta Match Assembly... -
Page 22: Lightning Protection
Select the two open-end chain links (Item No. Seal 58) and the two mast clamps (Item No. 60). An alternative is to use a Hy-Gain BN-86 50 Thread on chain link into the outer hole of a ohm balun for easy connection to your coax mast clamp and then through the two eyebolts cable. - Page 23 Figure 14 Boom Support Assembly...
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Page 24: Chapter 4 - Installation
CHAPTER 4 INSTALLATION Installation held by the ground crew, so that the guide rope can be retrieved. Make sure all element compression clamps and anchor screws are securely tightened. Attaching the Antenna to the Mast Also, make sure all beta match hardware is tightened securely and free of corrosion. -
Page 25: Other Types Of Towers
Figure 15 Attaching Boom-to- Mast Bracket Other Types of Towers These two ropes can then be used to slide the When installing the Discoverer 7-3 on a antenna on as if is also being lifted. The two guyed tower, you may wish to use a different ropes will need to be far enough from the guide system. -
Page 26: Operation
8 watts polyethylene, black CycolacO or black fiber- filled styron. Hy-Gain now recommends genuine Penetrox- AO from Burndy Corporation for use as an antielectrolytic compound within element assemblies. This prevents aluminum oxide from forming on the aluminum surface,... -
Page 27: Chapter 5 Service
CHAPTER 5 SERVICE Service If you are encounter technical problems and need assistance, you should contact Hy-Gain Customer Service Department. All requests, inquires, warranty claims, or for ordering replacement parts, contact: Hy-Gain 308 Industrial Park Road Starkville, Mississippi 39759 USA Phone:... -
Page 28: Attachment
Height of Antenna: NOTES: Attachment l... - Page 29 PARTS NOTE: Item Numbers may not necessarily be in numerical sequence and may appear more than one time, depending on how often a part is used or identical parts being placed in different parts packs. Item Description Part No. 372S 373S 102734 Bracket, Cast Aluminum Mast ...........
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Page 30: Parts List
PARTS LIST Item Part No. Description 372S 373S 878250 Parts Pack, 373S, Hardware (cont.) 506518 Bolt, hex head, 1/4"-20 x 11/4 ........4 505734 Bolt, hex head, 1/4"-20 x 21/2......... 2 505763 Bolt, hex head, 1/4"-20 x 13/4......... 0 562961 Lockwasher, internal, 1/4"-20........ - Page 31 PARTS LIST Item Description Part No. 3725 373S 878251 Parts Pack, 3735, Clamps and Miscellaneous ....0 169339 Clamp, Tubing 7/8" ............0 358756 Clamp, Tubing, #6............0 (Not Used) 351243 Turnbuckle, Eye and Eye, 7/32" x 2" ......0 455644 Caplug, black, 7/16" ............0 463642 Insulator, Rod Support ...........0 351700...
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