Hy-Gain DX-77A Instruction Manual Download Page 10 | Manualshive

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Detail A

Front View

Detail B

Side View

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Summary of Contents for DX-77A

Page 1: ...s The DX 77 A also features an overall length of 29 feet 8 8 m which contributes to exceptional bandwidths on 40 and 20 meters Specifications Electrical Frequency Bands 2 1 VSWR Bandwidth 40m 7 0 7 3 MHz 100 KHz min 150 KHz typ 30m 10 1 10 15 MHz 100 KHz min 150 KHz tpy 20m 14 0 14 35 MHz 200 KHz min 250 KHz typ 17m 18 068 18 168 MHz 200 KHz min 250 KHz typ 15m 21 0 21 45 MHz 400 KHz min 500 KHz t...

Page 2: ...uraged If you guy the support mast or tripod use non metallic guy ropes A ground wire may be connected to the mounting brackets Item 15 for lightning protection Tools Required Tape Measure 12 feet for assembly and tuning Nut Driver 3 8 inch for tuning and for assembly of matching unit Nut Driver 5 16 inch for tightening of tubing clamps 2 each Open End Wrench 1 2 inch for base bracket assembly 2 e...

Page 3: ...ghten the clamp with a 5 16 inch nut driver socket or open end wrench until the tubing will not twist or telescope Part Number Description Fits Tubing Sizes Clamp Size 6 358756 all stainless steel 1 2 and 3 4 5 6 hex head screw Part Number Description Fits Tubing Sizes Clamp Size 10 358757 all stainless steel 1 5 6 hex head screw Part Number Description Fits Tuubing Sizes Clamp Size 16 358758 all ...

Page 4: ...ube 7 16 x 62 10 Tubing Section 2 1 1 4 x 48 3 Tube 5 8 x 48 swaged 11 Tubing Section 1 6 Trap Assembly 3 30 meter 24 Clamp 6 tube 7 Trap Assembly 2 17 20 meter 25 Clamp 10 tube 8 Trap Assembly 1 10 12 15 meter 26 Clamp 16 tube 9 Tubing Section 3 1 1 8 x 48 27 Caplug 7 16 black Figure 2 Overall View of DX77 A ...

Page 5: ... the 1 Trap Assembly and insert the 2 Trap Assembly to the label Rotate the 2 Trap Assembly so that the lower capacitor does not touch any part of the 1 Trap Assembly Select Trap Assembly 3 30 meter and a size 10 tubing clamp Place the tubing clamp over the top of the 2 Trap Assembly and insert the 3 Trap Assembly to the label Tighten the clamp NOTE To fold this assembly for transport remove the o...

Page 6: ...X 77 A matching unit upper clamp Assemble as shown in Figure 4 Tighten all con two 2 bottom clamps 10 24 x 1 screws 10 24 nections securely nuts and lockwashers 1 4 20 x 1 bolt 1 4 20 nuts and lockwashers Figure 4 Matching Unit Assembly ...

Page 7: ...ve Tubing Section 2 and above while assembling the mast brackets to the mast Practice swivelling Section 1 to a vertical posi tion and installing the other bolts With help from at least one more person reattach the rest of the antenna then swivel the DX 77 A to a vertical position and install all the mounting bolts as shown in Figure 6 Tighten securely NOTE Tightening the pivot bolt more Item 14 w...

Page 8: ...adial tubes If you are close to the ground less than 48 inches try adjusting all of the radial tubes shorter to decrease the capacitive loading effect If you are at least 5 feet above ground and at least 20 feet from any fence building or vertical metallic object and your SWR is above 1 5 1 at resonance on all bands you may have a problem in the matching network If ALL of the bands show high SWR c...

Page 9: ...hen 34 length of trap 30 meters Move 30m adj clamp lower Shorten 31 1 2 length of trap Lengthen 31 1 2 length of trap 40 meters Lengthen tip dimension Shorten tip dimension NOTE When lengthening trap section dimen sions allow at least 2 insertion into the 1 1 8 tubes and at least 1 insertion of the 40m tip into the next section 12 15 17 20 30 Toning Guide 1 inch 100 130 KHz 1 inch 60 70 KHz 1 inch...

Page 10: ...Detail A Front View Detail B Side View ...

Page 11: ...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 FAX 662 323 6551 Typical VSWR Curves NOTE VSWR will vary with height above ground and location near houses fences masts and other surrounding objects ...

Page 12: ...t 5 16 18 x 5 4 1 4 501029 Bolt 3 8 16 x 5 1 2 1 1 5 5137000 Base bracket DX 77 A 4 1 6 555694 Nut 3 8 16 1 1 7 555747 Nut 5 16 18 8 1 8 561016 Lockwasher 3 8 split 1 1 9 564792 Lockwasher 5 16 split 8 2 870932 Parts Pack DX 77 A Clamps etc 1 2 1 179983 Clamp matching unit top 1 2 179984 Clamp matching unit bottom 2 2 3 179982 Clamp radial element 4 2 4 358756 Clamp 6 tube 6 2 5 358757 Clamp 10 tu...

Page 13: ...1 36 870939 Coil Assembly 17m 1 37 870942 Coil Assembly 10 12 15m 1 38 870936 Capacitor Assembly 30m 2 39 870940 Capacitor Assembly 20m 1 40 870941 Capacitor Assembly 17m 1 41 870934 Capacitor Assembly 15m 1 42 870944 Capacitor Assembly 12m 1 43 870943 Capacitor Assembly 10m l NOTE Some extra small parts are included as spares ...

Page 14: ...r warranty provided the product is returned postage prepaid to Hy Gain with a personal check cashiers check or money order for 8 00 covering postage and handling 3 Under no circumstances is Hy Gain liable for consequential damages to person or property by the use of any Hy Gain products 4 Out of warranty Service Hy Gain will repair any out of warranty product provided the unit is shipped prepaid A...

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