Hy-gain - Start Page

1 BroadbandModel TH-5 MMInstructionManualHy-gain308 Industrial Park RoadStarkville, MS 39759 USA PH: 662-323-9538 FAX: 662-323-6551 TABLE OF CONTENTSCHAPTERIPageGeneral Description ..1 Specifications ..1 CHAPTER 2 CHAPTERA ssembly of the Boom-to-Mast Bracket and 5 Assembly of the Element-to-Boom Brackets on the 6 Installation of Tubing Clamps .. 7 Element Driven Element ..9 Rear Driven Meter Reflector Element .. 1015-20 Meter Reflector Element .. 1010-15-20 Meter Director Element .. 12 CHAPTER 4 Installation ..19 Installation On a Crank-Up 19 Attaching the Antenna to the 19 Other Types of 20 Attachment of Feedline ..20 VSWR 5 Operation ..23 CHAPTER 6 CHAPTER 7 CHAPTER 8 LIST OF ILLUSTRATIONSF igureP1 Boom-to-Mast of Boom ..3 Element-to-Boom Bracket ..4 Tubing A - Detail - Measuring PointTrap.

2 16 Element Assembly and Antenna Dimensions .. 17 Rope Dampener ..18 Overall View of Beta Match and Phasing Tubes9 Beta Match Assembly ..110 Pigtail to Rear Driven Element .. 111 Pigtail to Balun Connection and Front Driven Element .. 1 CHAPTER 1 The Hy-gain TH5/MK2 is a 5 element, three band beam antenna designedfor broadband, high performance operation on the Amateur 10, 15 and 20meter bands. Broadbanding is accomplished through the use of two fullytrapped driven elements. Stainless steel hardware and clamps are used onall electrical connections. Hy-gain 's 50 ohm BN-86 balun and preformed feedstraps are supplied. The antenna is designed to fit masts from " to " indiameter and can be rotated with Hy-gain 's CD-4511, Ham IV or T2X! ri IFrequencies of Operation: 20mUnder 2:1 VSWR (MHz).. :1 VSWR (MHz).. Ratio (dB).

3 19 +/-522+/-5 19+/-5 Average 1/2-Power Beamwidth (deg).. 6766 66 Maximum gain (dBi) .. Power ..Maximum LegalLightning Protection ..DC GroundMechanicalBoom feet ( ) Boom inches( cm) ' 6" ( m)Longest Driven Element` (one-half total length).. 20m - .183 wavelength 15m 1 0m - .227 wavelengthSpecificationsMechanical (Cont.)(Cont.)Turning Radius ..18'5"( ) Accepts Mast .. " to " (50 mm to mm)Net 57 lbs. ( kg)Maximum Wind Survival ..100 mph (161 kmph)Effective Wind Area .. sq. ft. ( m)Effective Moment*..1050 ft. Ibs (144 kg-m)Wind Load at 80 mph ..190 lbs. (86 kg)Element Tubing .. All stainless steelHardware .. Stainless steel, except for boom-to-mast boltsSuitable Rotators .. Hy-gain CD-4511, Ham IV or T2X'Projected Area(elements) .. sq. ft. (.94 sq. m.)(boom) .. sq. ft. (.30 sq. m.)*Effective moment is defined as the product of the antenna weight andturning radius.

4 Projected Area is the actual (flat) projected area of either the elements orboom (highest value) without any shape factor included. This area may beused with EIA/TIA-222-D and later versions and with the UBC formulas todetermine tower and mast loading. On HF beams, the element area isusually higher. On VHF/UHF beams, the boom area is usually higher. Whenstacking HF and VHF beams, use the element area of all beams at theirattachment points to determine loading at zero degrees to the boom 7 FOR OUR OVERSEAS CUSTOMERS: The United States uses English unitsof measurement. Please see Parts List in back of this manual for assistancein identifying the hardware and components supplied with this a large, clear area to assemble the TH5/MK2. The area must be atleast 19 ft. x 31 ft. 6 in. ( m x m). You may wish to use sawhorses orchairs to support the boom during assembly.

5 A concrete driveway is anexcellent area for assembly. If you assemble this antenna over a grassy area,precautions should be taken so that hardware is not accidentally lost duringTOOLS: The following tools are required for easy assembly of the TH5/MK2:QtyType1 Tape Measure, 12 foot2 Adjustable Wrench, 8 inch1 Nut Driver, 7/16 inch1 Nut Driver, 3/8 inch1 Nut Driver, 5/16 inchWhen unpacking your antenna, check inside of all tubing for parts (traps,smaller tubing, etc.). To conserve space, these smaller articles are sometimesput inside larger pieces. Check all parts against the Parts List to make sure noparts are missing. The hardware supplied with this antenna is bagged bythread size for your tubing supplied with the TH5/MK2 telescopes together. Make allmeasurements to the given dimensions, plus or minus, no more than an 1 /8 The assembly of this antenna will be easier if you read this manual completelythrough at least three (3) times before beginning assembly.

6 Allow at least 6hours for assembly. Double and triple check ALL dimensions after : An extra Figure 6 has been inserted in this manual for use whenassembling the position of the elements onto the boom begins at the center of theantenna and progresses outward. Followthe instructions as outlined on page5 and referto Figure 6 for (-4-, blank)Assembly of theBoot-to-MastBrackets and hex head, 5/16"-18 x 5"35 Nut, hex, 1/4"-2017 Bolthex head, 5/16"-18 x 3'36 Lockwasher, internal, 1/ 4"18 Bolthex head, 5/16"-18 x 2 3/4'52 Caplug, 2'19 Nut, hex, 5/16'-1859 Mast Bracket, cast aluminum20 Lockwasher, split, 5/16"65 Tube, Boom, swaged, 2" x23 Bolt hex head, 5/16"66 Clamp, Boom-to-Bracket31 Bolthex head, 1/4"-20 X 3/4"67 Bracket, Casting-to-BoomSelect the boom-to-bracket damp parts (Item Nos. 66 & 67). Looselyassemble them on the boom ends (Item No.)

7 65), as shown in Figure 1. Lineup the holes on both brackets and both boom ends. Secure the two bracketstogether with four (4) 1/4"-20 X 3/4" bolts, lockwashers, and nuts. Secure thebrackets to the two boom ends using the 5/16"-18 x 2 314" bolts,lockwashers, and nuts. Tighten these six (6) bolts securely. The use of heavymotor oil on stainless steel threads will prevent galling of the two cast aluminum brackets (Item No. 59) on the mast at thedesired height above your tower. Secure the two brackets together using thetwo (2) 5/16"-18 x 4" bolts, lockwashers, and nuts. You may wish to drill ahole through your mast so that the remaining 5/16"-18 x 4" bolt may beinserted through the cast brackets and the mast and tightened. This bolt willprevent the antenna from twisting on the mast in high winds. See Figure four (4) 5 inch bolts will be installed when the antenna is installed on theSlip the two remaining boom sections (Item No.

8 57) over the two swagedends of the assembled boom and secure using (2 each) 1/4"-20 x 2 1/2" bolts,lockwashers, and nuts as shown in Figure 1 Boom-to-MastBracketCHAPTER 8 Assembly of theFront Driven Element -Element-to-BoomSelect one pair of the largest element-to-boom brackets (Item No. 62).These areBrackets on themarked with a number 14. Assemble the brackets on the boom 35 inches toRear Driven Element -Select another pair of the largest element-to-boom brackets (Item No. 62).Assemble these brackets on the boom 20 inches to the right of the center ofthe mast bracket. Refer to Figure 3. DO NOT tighten the bolts at this Meter Reflector-Select a pair of the smallest element-to-boom brackets (Item No. 60). Theseare marked with a number 4. Assemble these brackets on the boom 531/4inches to the right of the rear driven element brackets.

9 Refer to Figures 3 and6. DO NOT tighten at this Director and 15-20 Reflector-Select two sets of medium sized element-to-boom brackets (Item No. 61) andloosely assemble these on the boom ends. The front set should be 68 inchesto the left of the Front Driven Element brackets. The rear set should be 36inches to the right of the 10 meter reflector brackets. Refer to Figures 3 and6. DO NOT tighten ofTubingDRIVEN ELEMENT , hex head, '/."-20 x 3/8 "36 Lockwasher, internal, '/,"Bolt, hex head, Y."-20 x 3/4"56 Insulator, Driven ElementNut, square, 1/4" - 2060 Bracket, Element-to-Boom, #4 Nut, hex, '/."-2061 Bracket, Element-to-Boom,62 Bracket, Element-to-Boom,2931 Figure 3 Element-to-Boom BracketSelect the proper size tubing clamp as shown in the chart Wheninstalling the clamps, place the clamp near the tube end with the top ofthe clamp over the slot in the tube as shown in Figure adjustment of the tubing lengths, tighten the clamp with a 5/16inch nut driver, socket, or open end wrench until the tubing will nottwist or telescope.

10 DO NOT of the broadband nature of the TH5/MK2, it is supplied with only onesetting for use on all modes on all of the 20, 15, and 10 meter bands up MHz. If assembled correctly, the VSWR should be below 2:1 on anyfrequency on these : The VSWR will not exceed 3:1 between and MHz using thenormal setting. However, the TH5/MK2 can be optimized for the frequencyrange of to MHz by using the following dimensions instead of thoseshown in Figure 29"( = 22" ( cm)D2 = 23" ( cm)With these changes, the VSWR will not exceed :1 within the range of MHz. The VSWR will remain less than 2:1 over most of the 20 and 15meter following steps will be in singular form. Do each element assembly step,first for one side of the boom and then for the other side. The dimensionsshown in Figure 6 are in English units on the right side and metric on the leftside.)