Hy-Gain DIR-73, Instruction Manual

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 ...

Page 2: ...eflector Element 3 7 Assembly of the Director Element 3 8 Driven Element Reflector and Director Linear Loading Wire Assembly 3 11 Beta Match Assembly 3 14 Lightning Protection 3 15 Attachment of Feedline 3 15 Boom Support Assembly 3 15 CHAPTER 4 INSTALLATION Installation 4 17 Installation on a Crank Up Tower 4 17 Attaching the Antenna to the Mast 4 17 Other Types of Towers 4 18 Operation 4 19 Main...

Page 3: ...5 VSWR Charts 3 6 6 Front to Back Ratios 3 6 7 Assembly of the Reflector Element 3 7 8 Assembly of the Director Element 3 9 9 Overall View of Antenna 3 10 10 Linear Loading Wire Assembly 3 11 11 Attachment of Linear Loading Wire Assembly Near Insulator 3 12 12 Identification of Linear Loading Wires LLW 3 13 13 Beta Match Assembly 3 14 14 Boom Support Assembly 3 16 15 Attaching Boom to Mast Bracket...

Page 4: ...m support system which gives both lateral and vertical support and stability The Discoverer 7 3 incorporates the principles of linear loading which results in lower loss and greater radiation efficiency than is possible with loading coils when used in shortened elements The Discoverer 7 3 also features a low voltage feedpoint that eliminates insulator failures and assures full power capabilities W...

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 ...

Page 6: ...mbly of the Discoverer 7 3 If you are adding the Discoverer 7 3 Director Kit to a previously assembled Discoverer 7 2 then follow these instructions The Discoverer 7 2 must be at ground or rooftop level to work on it DO NOT try to modify it while on your tower The following parts may be disassembled and discarded as they will be replaced by new parts in the Director Kit See Figure 14 Boom Support ...

Page 7: ... loosened so that the driven element can be removed from the boom end The element to boom clamp and beta match assembly should be disassembled and saved for later reassembly The length of the driven element will be adjusted in a later step The reflector element to boom clamp should be loosened so that the reflector element can be moved to 12 inches from the boom end measured to the center of the e...

Page 8: ...d their appropriate hardware before beginning further installation of the antenna See Figure 2 The different sized brackets can be identified by a number stamped into the surface of each bracket half DO NOT tighten the bolts until instructed to do so Slide the large driven element bracket over the front boom end to the location shown in Figure 3 You may wish to assemble this bracket on the boom at...

Page 9: ...Figure 1 Assembly of Boom Tubes to Casting to Boom Bracket and Boom to Bracket Clamp ...

Page 10: ...Director Kit to a preassembled Discoverer 7 2 then you only need to readjust the DE5 section A dimension to that shown in Table 1 and position the driven element on the boom DE1 Item No 10 is inserted completely into the driven element insulator DE 1 Item No 10 is positioned with the small holes up and down Tighten the anchor bolts on the element to boom bracket Item No 28 last This will en sure t...

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Page 12: ...securely after setting Item Number 7 and 49 to their proper length Figure 4 Tubing Clamps The Discoverer 7 3 is supplied with dimensions for 3 settings within the 40 meter Amateur band The three settings are entitled CW MID and PHONE The CW setting is optimized for operation from 7 00 7 20 MHz The MID setting is optimized for operation from 7 05 7 25 MHz and the PHONE setting 7 15 7 30 MHz The VSW...

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Page 14: ...ightening the hardware make sure that R1 Item No 10 is inserted completely into the element to boom brackets R1 Item No 10 is positioned with the small holes up and down R1 Item No 10 is positioned so that the ele ment will be horizontal when installed on the mast Figure 7 Assembly of the Reflector Element ...

Page 15: ...are adding the Discoverer 7 3 Director Kit to a preassembled Discoverer 7 2 then you only need to readjust the R5 section B dimension to that shown in Table 2 and position the reflector element on the boom D1 Item No 10 is positioned with the small holes up and down D1 Item No 10 is positioned so that the ele ment will be horizontal when installed on the mast Tighten the anchor bolts Item No 28 la...

Page 16: ...Figure 8 Assembly of the Director Element ...

Page 17: ...Figure 9 Overall View of Antenna ...

Page 18: ...inear loading wires Refer to Figures 11 and 12 for assistance in identifying and assembling each assembly Ite Item No 8 Description Tube Element DE3 R3 D3 7 8 x 55 No Description 9 Tube Element DE2 R2 D2 1 x 51 22 Lockwasher internal 6 11 Hairpin LLWI 69 29 Bolt hex head l 4 20 x 12 Hairpin LLW2 28 32 Lockwasher internal 1 4 20 13 Hairpin LLW3 631 2 34 Nut hex 1 4 20 15 Hairpin LLW5 631 2 36 Bolt ...

Page 19: ...Figure 11 Attachment of Linear Loading Wire Assembly Near Insulator ...

Page 20: ...Figure 12 Identification of Linear Loading Wires LLW ...

Page 21: ... 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: ...securely Tape the coax to the boom to ensure good strain relief NOTE If you have previously assembled the Discoverer 7 2 then you should disassemble the mast clamps Item No 60 chain links Item No 58 and turnbuckles Item No 57 as these will be used again Item Numbers 59 52 61 and 62 may be discarded from the old antenna Select the two open end chain links Item No 58 and the two mast clamps Item No ...

Page 23: ...Figure 14 Boom Support Assembly ...

Page 24: ...r rope is strong enough and that you have enough help on the ground to lift held by the ground crew so that the guide rope can be retrieved Attaching the Antenna to the Mast When the antenna reaches the mast bracket the four 4 5 bolts should be inserted through the holes in the mast bracket and secured using 5 16 181ockwashers and nuts Item Nos 23 27 26 Tighten all bolts securely You may wish to u...

Page 25: ...s well as the tower You may wish to use two ropes attached together at the top of the tower and attached to the ground about 15 feet apart These two ropes can then be used to slide the antenna on as if is also being lifted The two ropes will need to be far enough from the tower base to allow some sag and still support the antenna away from the guy wires WARNING Installation of this product near po...

Page 26: ...of clear chromate The internal tooth type lockwashers used in this antenna are made of a slightly magnetic grade of stainless steel The element compression clamps are made of T304 passivated stainless steel All other metallic parts are aluminum All insulators are made of either black polyethylene black CycolacO or black fiber filled styron For example if the forward power is 120 watts and the refl...

Page 27: ...ical 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 662 323 9538 ...

Page 28: ...Height of Antenna NOTES Attachment l ...

Page 29: ...in I LW5 63 1 2 4 2 16 460316 Insulator Element 40 Meter 4 2 17 465833 Insulator Element DE1 2 0 18 171439 Beta Rod 1 4 x 72 2 0 19 Not Used 48 165919 Bracket Element to Boom 13 2 2 49 171533 Tube Element DE5 D5 7 16 x 58 2 2 50 171538 Tube Boom 2 x 83 2 0 51 171539 Tube Boom 2 x 54 3 4 swaged 2 0 52 691081 Cable Boom Support 1 8 x 20 ft 1 4 67 171540 Tube Boom 2 x 81 swaged 0 2 70 171541 Tube Boo...

Page 30: ...78246 Parts Pack 372S Clamps 1 0 42 169339 Clamp Tubing 7 8 8 0 43 358756 Clamp Tubing 6 8 0 44 Not Used 55 163371 Clamp Beta Shorting 2 0 56 171333 Clamp Tubing 11 4 2 0 878247 Parts Pack 3725 Insulators 1 0 45 455625 Caplug black 2 2 0 46 455644 Caplug black 7 16 4 0 47 463642 Insulator Rod Support 48 0 878248 Parts Pack 3725 Boom Support 1 0 57 351243 Turnbuckle Eye and Eye 7 32 x 2 2 0 58 3512...

Page 31: ...nd Eye 7 32 x 2 0 2 46 455644 Caplug black 7 16 0 2 47 463642 Insulator Rod Support 0 28 59 351700 Thimble Wire Rope 5 32 0 8 61 381253 Strap Boom Support 0 4 66 380422 Clamp Compression 11 4 1 0 4 Converting American Measurements to Metric Use this scale to identify lengths of bolts 1 inch 1 2 54 cm diameters of tubes etc The American inch 1 foot 1 30 48 cm and foot can be converted to centimeter...