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MODEL

DISCOVERER 7-1

40-Meter 1-Element

Dipole Antenna

ORDER NO. 371S

NOTICE

All rights in this publication are reserved. No part of the
publication may be reproduced in any manner
whatsoever without the expressed written permission of
Hy-Gain.

Содержание Discoverer 7-1

Страница 1: ... 40 Meter 1 Element Dipole Antenna ORDER NO 371S NOTICE All rights in this publication are reserved No part of the publication may be reproduced in any manner whatsoever without the expressed written permission of Hy Gain ...

Страница 2: ...on Between 7 3 and 10 5 MHz 13 Installation 14 Service Information 14 Parts List 15 L I S T O F I L L U S T R A T I O N S F i g u r e P a g e 1 Boom to Mast Bracket 5 2 Assembly of the Element to Boom Brackets 6 3 Assembly of the Driven Element 7 4 Compression Clamps 8 5 DE5 Section Dimension Chart 9 6 Installing Hairpins on Driven Element 10 7 Hairpin Attachment Near 40 Meter Insulator 11 8 Ident...

Страница 3: ... The Discoverer 7 1 is also capable of being tuned to any frequency between 7 0 and 10 5 MHz due to the linear loading The Discoverer 7 1 features stainless steel hardware and clamps on all electrical and most mechanical connections WARNING When installing your system take extreme care to avoid any accidental contact with power lines or overhead obstructions Failure to exercise this care could res...

Страница 4: ...mbly of the Discoverer 7 1 When unpacking your antenna check inside of all tubing for parts smaller tubing etc To conserve space these smaller articles are sometimes put inside larger pieces Check all parts against the Parts List to make sure no parts are missing All tubing supplied with the Discoverer 7 1 telescopes together Make all measurement to the given dimensions plus or minus no more than ...

Страница 5: ...igure 1 The use of two split lockwahsers on the 5 bolts may be necessary to properly tighten the clamp on a 2 mast Additional washers may be needed if masts slightly smaller then 2 are used When you are ready to install the antenna on your mast the two cast aluminum brackets can be mounted first using the 3 inch bolts Item No 24 Then the assembled antenna can be installed upon these brackets using...

Страница 6: ...ators Item No 17 Slip the thick walled ends of the DE I sections into the insulators then slip the insulated end into the brackets which are assembled on the boom Turn the boom so that the element will be at 90 degrees to the mast and tighten all of the bolts to hold the element securely Tighten the two anchor bolts Item No 28 last Make sure that the three small holes in each DEI section are in th...

Страница 7: ...x 55 Item No 8 and slip the drilled ends into the open end of the 40 meter element insulators Line up the holes and secure using 10 24 x 2 bolts lockwashers and nuts Item Nos 35 40 38 Select the 40 meter element insulators Item No 16 and slip each onto the ends of the DE2 sections which were previously installed Line up the holes in each part and secure using 10 24 x 2 bolts lockwashers and nuts I...

Страница 8: ...ng the clamps place the clamp near the tube end with the top of the clamp over the slot in the tube as shown in the illustration Assemble a 1 2 compression clamp Item No 43 and slip it over the end of the DE4 section See Figures 3 and 4 After adjustment of the tubing lengths tighten the clamp with a 5 16 inch nut driver or open end wrench until the tubing will not twist or telescope Select the DES...

Страница 9: ... meter insulator as shown in Figure 7 using the 1 4 20 x 1 1 4 Item No 3 and 1 4 20 x 1 1 2 bolts nuts Item Nos 29 32 34 Identify the LLW sections from the drawing in Figure 8 and assemble as shown in Figure 6 using the 10 24 x 1 2 bolts lockwashers and nuts Item Nos 36 40 38 Start assembling the LLW sections to the element beginning at the 40 meter insulator Position the tubing clamps Item 42 as ...

Страница 10: ...Figure 6 Installing Hairpins on Driven Element ...

Страница 11: ... lugs not supplied and connect to the dipole Tape the cable to the boom for strain relief An RF choke made from 12 turns of RG 123 u coax in a 14 diameter circle is recommended with the split coax feed An alternative method is to use a Hy Gain BN 86 50 ohm balun for easy connection to your coax cable Pigtail leads of 10 gauge stranded wire 7 inches long should be used from the balun to the tubing ...

Страница 12: ...Figure 8 Identification of Linear Loading Wires LLW ...

Страница 13: ... 650 kHz To adjust the Discoverer 7 1 to a setting above 7 3 MHz the linear loading wires should be shorted out at the appropriate locations The top and bottom linear loading wires should both be shorted out at the same distance from the 40 meter insulator See Figure 9 The short can be fabricated from a piece of short hook up wire twisted around the linear loading wires at the specific location an...

Страница 14: ...attach to the cast brackets using the four 4 5 16 18 x 5 bolts lockwashers and nuts Item Nos 23 27 26 Tighten securely Happy DX ing If you are unable to resolve technical problems you should contact the Hy Gain Customer Service Department in Lincoln NE You should retain your sales receipt or other proof of purchase for antennas that are still under warranty See separate sheet for Telex Warranty Al...

Страница 15: ...sulator Element DE1 2 18 Not Used 19 Not Used 878243 Parts Pack 371S Stainless Steel Hardware 1 20 500143 Bolt round head 6 32 x 2 12 21 555888 Nut hex 6 32 12 22 565889 Lockwasher internal 6 12 23 500349 Bolt hex head 5 16 18 x 5 4 24 500392 Bolt hex head tap 5 16 x 18 x 3 2 25 506968 Bolt hex head 5 16 18 x 2 3 4 2 26 555747 Nut hex 5 16 18 9 27 564792 Lockwasher split 5 16 9 28 500156 Bolt hex ...

Страница 16: ...55625 Caplug black 2 2 46 455644 Caplug black 7 16 2 47 463642 Insulator Rod Support 24 48 5142400 bolt hex head 5 16 18 x 4 1 Converting English Measurements to Use this scale to identify lengths of bolts diameters 1 inwh l 2 54 cm of tubes etc The English inch and foot can be converted to centimeters in this way 1 foot 1 30 48 Example 42 x 2 54 106 7 cm ...

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