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Summary of Contents for Hy-Gain DIS-72
- Page 1 DIS-72 Discoverer 7-2 40-Meter 2-Element HF Beam Instruction Manual Hy-gain 308 Industrial Park Road Starkville, MS 39759...
- Page 2 Please record the following information for your records: Date of Purchase: Purchased From Price Paid Please retain your copy of the Bill-of-Sale for Warranty claims.
- Page 3 TABLE OF CHAPTER 1- GENERAL DESCRIPTION..................General Description ..........................CHAPTER 2 - PRE-ASSEMBLY INFORMATION................ 2-1 Preparation for Assembly CHAPTER 3 - ASSEMBLY ........................3-1 Assembly of the Boom-to-Mast Brackets and Boom................ 3-1 Element-to- Boom Brackets........................3-2 Assembly of the Driven Element......................
- Page 4 LIST OF Figure Assembly of Boom Tubes to Casting-to-Boom Bracket and Boom-to-Bracket Clamp..................3-1 2 Element-to- Boom Brackets ..................... 3-2 3 Assembly of the Driven Element ..................3-3 Tubing Clamps ........................3-4 VSWR Charts........................3-4 Front-to-Back Charts ......................3-5...
- Page 5 CHAPTER I - GENERAL INFORMATION General Description The Hy-Gain Discoverer 7-2 is an optimum spaced, WARNING two element beam for the 40 Meter Amateur band. The Discoverer 7-2 incorporates the principles of When installing your system, take extreme linear-loading which results in lower loss and...
- Page 6 CHAPTER 2 -PRE-ASSEMBLY Preparation for Assembly Corrosion Precautions FOR OUR OVERSEAS CUSTOMERS: The Discoverer 7-2 antenna is designed to be relatively maintenance free most The United States uses American units of environments. All hardware is made of passivated measurement. If you use the Metric System, see stainless steel, typically grade 304.
- Page 7 CHAPTER 3 - Assembly of the Boom-To-Mast Brackets Attach the remaining boom sections (Item No. and Boom 50 ) and secure with the two (2) 1/4" - 20 x 21/2" bolts, internal lockwashers and nuts (Item Nos. 53, 32 & 34). Tighten all hardware Refer to Figure 1 and begin as securely.
- Page 8 Assembly of the Driven Element Element-To-Boom Select the parts, as listed in Figure 3, and as- To save time, loosely assemble both of the ele- semble them as shown. Before tightening the ment-to-boom brackets and their appropriate hardware, make sure that: hardware before beginning further installation of the antenna.
- Page 9 Tighten the anchor bolts on the element-to- boom bracket (Item No. 28) last. This will en- sure that the element will not slip on the boom. AO- 372S -B- Dimension One Half DE I-ngth* " A " Setting (Inches) (mm) (Inches) 1194 6.553...
- Page 10 Refer to Figure 4 for tubing clamp assembly in- Installation of Tubing formation. Tighten these clamps securely after setting Item Nos. 7 and 49 to their proper Select the #6 tubing clamp as shown in the length. chart. When installing the clamp, place the The Discoverer 7-2 is supplied with dimensions clamp near the tube end with the top of the for three (3) settings within the 40 Meter...
- Page 11 Assembly of the Reflector Element Select the parts listed in Figure 8 and assemble them shown. Before tightening 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.
- Page 12 Setting "B" Dimension 1/2 Reflector Length* (Inches) (mm) (Inches) 1448 267.5 6.795 1372 264.5 6.719 PHONE 1295 261.5 6.642 *Measured from boom edge to element Table 2...
- Page 14 The 7/8" tubing clamp (Item 42) as shown in Driven Element and Reflector Linear- Detail A of Figure 11 should be positioned as loading Wire Assembly close as possible to the 40 meter insulator. Other clamps and wire positions will depend upon the Select the parts listed in Figure 10.
- Page 15 Item Item Description Description Tube, Element DE3 and R3,7/8" x 55" Lockwasher, internal, 1/4" - 8 11 "Hairpin", LLW1, 69" Nut, hex, 1/4" - 20 "Hairpin", LLW3, 631/2" Bolt, hex head, #10 - 24 x "Hairpin", LLW4, 31/2" Nut, hex, #10 - 24 "Hairpin", LLW5, 631/2"...
- Page 17 Beta Match Assembly AO-3725-A- Select the parts listed in Figure 13 and Detail A and assemble them as shown. The beta shorting clamp should be flush with the ends of the beta rods. After attaching your coax cable to the feedpoint, tighten all hardware securely.
- Page 18 Route both cables along the boom and tape near the An alternative is to use a Hy-Gain BN-86 or BN- boom-to-mast bracket so they can be reached 4000 50 ohm balun for easy connection to your after the antenna has been mounted on the tower.
- Page 19 Item Description Description Lockwasher, internal, 1/4" - 20 Mast Clamp, Boom Support, 15/8" I.D. Nut, hex, 1/4" - 20 Strap, Boom Support Cable, Boom Suport,1/8" x 20' Clamp, Boom Support, 2" I.D. Turnbuckle, Eye and Eye, 7/32" x 2" Bolt, hex head, 3/8" - 16 x 2", tap Chain Link, Open-End, 3/16"...
- Page 20 CHAPTER 4 - INSTALLATION Attaching the Antenna to the Mast Installation Assemble the two cast aluminum brackets (Item Make sure all tubing clamps and anchor screws No. l) on the mast at the desired height above are securely tightened. Also, make sure all beta- your tower.
- Page 21 AO-372S-B-012 2 5 - 2 7 - 2 6 2 3 - 2 7 - 2 6 (Typi cal 2 pl aces) (Typi cal 4 (Opti onal on some products) 6 6 - 2 7 - MAST -SUPPL IED BY CUSTOMER /.
- Page 22 CHAPTER 5 SERVICE / PARTS LIST Service Information 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...
- Page 24 Converting American Measurements to Metric Use this scale to identify lengths of bolts, diameters of tubes, etc. The American inch (") and foot (') can be converted to centimeters in this way. 1 inch (1") = 2.54 cm 1 foot (1') = 30.48 cm Example: 42"...
- Page 25 Any evidence of alteration, erasure, or forgery shall be cause to void any and all warranty terms immediately.
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