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Summary of Contents for Hy-Gain DX-88
- Page 1 8-Band HF Vertical 80 thru 10 Meters Model DX-88 Instruction Manual...
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Page 2: Table Of Contents
Attaching Capacitors to Coil Assembly..................3-7 Attaching Upper Radiator Tubes to 30 Meter Trap Assembly............3-8 Installation of Tubing Clamp......................3-9 Attaching the Trap Assemblies....................3-10 DC Shorting Coil.......................... 3-10 Tuning the DX-88 Vertical Antenna..................3-12 Chapter 4............................4-1 Mounting the Antenna ........…………............4-1 Operation ...........................4-4 Service Information ........................4-4 VSWR Record........…..................4-5... - Page 3 DC Shorting Coil 3-10 Connecting Trap Assemblies 3-11 DX-88 Overall View 3-16 DX-88 Ground Mount Radial System DX-88 Resonant Radial System Roof Mounted Radial System LIST OF GRAPHS AND TABLES Graph Page Dimension A and B, 80/40 Meter for 6.9-7.3 MHz 3-13 Dimension A and B, 80/40 Meter for 3.5-4.0 MHz...
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Page 4: Chapter 1
SWL 11, 13, 16, 19, 22, 25, 31, capacitive in the 7.0 - 7.3 MHz band. Adjustable 41, 49, 74, and 90 meter bands. The DX-88 will piston capacitors set the resonance of this tuned work against an earth ground and a set of ground... -
Page 5: Specifications
SPEC IFIC ATIONS Elect rical Frequency: Transmit ......………....80, 40, 30, 20, 17, 15, 12, 10 meter A m a t e u r Bands Receive.......……………..... 3-30 MHz, tunable in 8 International SWL Bands. Input impedance ....…………………………………………………………………….50 ohms VSWR at resonance........………………l e s s than 1.5:1 if using recommended' radial' system Maximum Power* .. - Page 6 TYPICAL VSWR CURVES Cont.
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Page 7: Chapter 2
1/8 inch. A bench-vise may be used to hold the tubing The assembly of the DX-88 will be easier if during assembly. If you assemble this antenna you read this manual completely through at... -
Page 8: Chapter 3
CHAPTER 8 BASE ASSEMBLY 80/40 METER ASSEMBLY Capacitor Assembly Select the DX-88 base assembly and assemble Construct the two 45" capacitors for the 80/40 as shown in Figure 1. meter assembly. Select a 1" x 45" tube (Item 3), 7/16" x 48" tube (Item 1), 3 spacers (Item 35), 1 rain cap (Item 36), and 1 caplug (Item 34) for each capacitor assembly. -
Page 9: Meter Assembly
Detail B Detail C 11/8" x 7/16" Mast/Capacitor Clamp 1 1/8" x 1" Mast/Capacitor Clamp Detail A Item Description Description Tube, 7/16" x 48" Nut, 10-24, hex, stainless steel Tube, 1" x 45" Lockwasher, #10, internal, stainless steel Coil Assembly, 80/40 Meters Caplug, 7/16"... -
Page 10: Meter Trap Assembly
The 3rd spacer should be centered between the 10/12/15 METER TRAP other two. Push the rain cap onto the top of Capacitor this tube and then slide this assembly into the 1" x 16" tube. Seat the rain cap over the 1 inch There is one 16 inch capacitor and two 13 inch tube. -
Page 11: Attaching Capacitors To Coil Assembly
NOTE: The edge of each 11/8" x 1" clamp Attaching Capacitors to Coil Assembly should be flush with the edge of each coil Loosely assemble three pairs of 11/8" x 1" form. The rain caps should be pushed clamps and three pairs of 11/8" x 7/16" clamps completely on each 1"... -
Page 12: Capacitor Assembly
The 3rd spacer should be centered between the 17/20 METER ASSEMBLY other two. Push the rain cap onto the top of Capacitor Assembly this tube and then slide this assembly into the 1" x 16" tube. Seat the rain cap over the 1 inch There is one 16 inch capacitor and one 13 inch tube. -
Page 13: Attaching Capacitors To Coil Assembly
NOTE: The edge of each 11/8" x 1" clamp Attaching Capacitors to Coil Assembly should be flush with the bottom edge of each Loosely assemble two pairs of 1 1/8" x 1" coil form. The rain caps should be pushed clamps and two pairs of 1 1/8"... -
Page 14: 30 Meter Trap Assembly
30 METER TRAP ASSEMBLY Attaching Capacitors to Coil Loosely assemble a pair of 1" clamps and a pair of 3/8" x 1" x 3/8" clamps as shown in Details A and B of Figure 7. Select the 30 meter coil assembly (Item 15) and attach the capacitors onto the coil assembly using the clamps as shown in Figure NOTE: The edge of each clamp assembly... -
Page 15: Attaching Upper Radiator Tubes To 30 Meter Trap Assembly
ATTACHING UPPER RADIATOR TUBES TO 30 METER TRAP AS- SEMBLY Select the 30 meter trap assembly, 7/8" x 36" tube (Item 11), 5/8" x 48" tube (Item 10), 7/16" x 55" tube (Item 2), and the two #6 tubing clamps (Item 21). Assemble as shown in Figure 8. -
Page 16: Installation Of Tubing Clamp
After adjustment of the tubing lengths, tighten INSTALLATION OF TUBING the clamp with a 5/16 inch nut driver, socket, CLAMPS or open end wrench until the tubing will not Select the proper size tubing clamp as shown twist or telescope. in the chart. -
Page 17: Attaching The Trap Assemblies
ATTACHING THE DC SHORTING COIL TRAP ASSEMBLIES The VSWR on the 40 and 80 Meter bands may improved construction Slide the bottom end of the 30 meter trap into installation of a matching coil. This coil will the top end of the 17/20 meter trap assembly. also provide a DC ground for the antenna, Dimension H will be set later on in the which may help to prevent precipatation... -
Page 18: Connecting Trap Assemblies
Figure 11 Connecting Trap Assemblies... -
Page 19: Tuning The Dx-88 Vertical Antenna
TUNING THE DX-88 tops. Mast mounting is the same as roof top VERTICAL ANTENNA mounting. Decide if you want to tune the DX-88 vertical for the 8 HF amateur bands or whether you A radial system is always required with this wish... - Page 20 Graph 1 Graph 2 Sum of Dimension A and B Sum of Dimension A and B 80/40 Meter Trap for 6.9-7.4 MHz 80/40 Meter Trap for 3.5-4.0 MHz Graph 3 Graph 4 Dimension C Dimension D 10 Meter Trap for 27-29.7 MHz 12 Meter Trap for 245-26.5 MHz...
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Page 21: Dimension G, 20 Meter Trap For 13.5-15.5 Mhz
Graph 5 Graph 6 Dimension E Dimension F 15 Meter Trap for 20.5-22 MHz 17 Meter Trap for 17.5-18.5 MHz Graph 8 Dimension H 30 Meter Trap for 9.5-10.5 MHz Graph 7 Dimension G 20 Meter Trap for 13.5-15.5 MHz... -
Page 22: Broadcasting Frequencies
DIMENSION DIMENSION SETTING "H" "I" HAM - CW 16 in. 18 in. HAM-PHONE 19 in. 28 in. S WL 41/75 METERS S WL 25 in. 46 in. 49/90 METERS Table 1 Dimension H and I for HAM and SWL Settings The following high frequency bands have been allocated by the International Telecommunication Union to be used for broadcasting: MegaHertz... -
Page 23: Dx-88 Overall View
TOP VIEW TOP VIEW Figure 12 DX-88 Overall View... -
Page 24: Chapter 4
20 feet from buildings, metal fences, metal masts or flag poles and other If the DX-88 is installed on the ground, a metallic structures. radial system is normally required. The minimum... -
Page 25: Dx-88 Resonant Radial System
Longer If the DX-88 vertical is installed on a garage radials and more radials will reduce the or house roof, a resonant radial system must ground losses and effectively increase the be used. -
Page 26: Roof Mounted Radial System
RESONANT RADIAL LENGTHS AMATEUR BAND WIRE LENGTH SWL BAND WIRE LENGTH (METERS) U.S. METRIC (METERS) U.S. METRIC 41/40 34'2" 10.41 m 25'1" 7.65 m 23'9" 7.24 m 17'10" 5.43 m 17'1" 5.21 m 16'0" 4.87 m 13'8" 4.17 m 13' 10" 4.23 m 3.63 m 11'5"... -
Page 27: Operation
Phone: 662-323-9538 FAX: 662-323-6551 CAUTION: Align the bottom tube of the DX-88 antenna parallel to your support mast before tightening. Your support mast must be 1 1/2" - 1 5/8" (38-41 mm) O.D. Tighten the U-bolts _securely using open-end wrenches! If one U- bolt is loose, the bracket will twist. -
Page 28: Vswr Record
VSWR RECORD Type of VSWR Meter Date_____________ Date______________ Date____________ Frequency VSWR VSWR VSWR 7.000 7.150 7.300 10.100 10.150 14.000 14.200 14.350 18.068 18.168 21.000 21.250 21.450 24.890 24.990 28.000 28.400 28.800 29.600... -
Page 29: Chapter 5
CHAPTER 5 PARTS LIST Item 174865 Tube, 7/16" x 48".................. 2 174939 Tube, 7/16" x 55"..................1 179764 Tube, 1" x 45" ..................2 179767 Tube, 1" x 16" ..................2 179768 Tube, 1" x 13" ..................3 179771 Splice, 11/4" x 6 1/4", slotted .............1 179772 Splice, 13/8"... - Page 30 Hy-Gain Warrants to the original owner of this product, if manufactured by Hy-Gain and purchased from an authorized dealer or directly from Hy-Gain to be free from defects in material and workmanship for a period of 12 months for rotator products and 24 months for antenna products from date of purchase provided the following terms of this warranty are satisfied.
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