CUSHCRAFT Big Thunder X7 Assembly & Installation Download | Manualshive

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20-15-10 Meter Seven Element Beam

951470 (12/97)

COMMUNICATIONS ANTENNAS

ASSEMBLY &

INSTALLATION

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Summary of Contents for Big Thunder X7

Page 1: ...20 15 10 Meter Seven Element Beam 951470 12 97 COMMUNICATIONS ANTENNAS ASSEMBLY INSTALLATION ...

Page 2: ... objects such as trees power lines buildings and other antennas will interact with an HF Yagi To minimize the effects of surrounding objects mount the antenna as high and in the clear as possible Metallic guy wire within 30 feet of this antenna broken with strain insulators will improve performance 40 Meter Add On Kit The X740 40 meter add on kit is available for the X7 The kit consists of a loade...

Page 3: ... x 13 3 x 0 3 cm 2 ____ 330885 Brush 1 ____ TB 20 3 4 15 Meter Director Trap 52 7 cm 2 ____ T9 17 10 Meter Director Trap 43 2 cm 2 ____ MNX79 MNX7 Matching Network 1 ____ BA 2 1 2 x 84 Drilled Aluminum Tube 6 4 x 213 cm 1 ____ BB 2 3 8 x 24 Drilled Aluminum Tube 6 0 x 61 cm 1 ____ BC 2 1 2 x 60 Drilled Aluminum Tube 6 4 x 152 cm 1 ____ BD 2 3 8 x 12 Drilled Aluminium Tube 6 0 x 31 cm 1 ____ BE 2 1...

Page 4: ...BA BB BE BC BD Figure 2 Figures 1 2 3 and 4 show the steps for boom assembly Identify the tubing sections element brackets and hardware required for this step by using the Boom Subassembly Parts List Note the element brackets for Elements 3 and 6 join the boom sections Figure 3 Refer to Figures 4A 4B 4C and 4D to assemble element brackets The 1 4 hex nuts 85 are used as spacers on all brackets Tig...

Page 5: ...ve 1 8 gap between brackets Leave 1 8 gap between brackets 588 588 509 99 99 99 99 99 99 82 84 82 84 82 84 82 84 85 85 509 588 509 99 99 99 99 99 82 84 82 84 509 82 84 82 84 85 85 509 82 84 592 82 84 85 85 82 84 588 504 84 99 99 99 99 99 84 84 509 84 504 504 564 82 84 82 84 85 564 99 99 ...

Page 6: ... L Figures 5 5A 5B and 5C show the steps for element assembly Identify the tubing sections required for each element using the Element Subassembly Parts List Each telescoping tubing section is inserted 4 inches into the larger section except where noted in Figure 5 Adjust the length of the end tubing section to give each element the proper total half length All dimensions should be within 1 4 inch...

Page 7: ... elements by using the Element to Boom Parts List Figure 6 shows the position of each element on the boom Figures 6A 6B 6C 6D 6E 6F show the hardware required to attach each element to the element bracket Position each element center mark equidistant between each Cush A Clamp Leave the Cush A Clamps loose on the Log Cell Elements 3 4 5 6 until the feed straps are attached in Step 5 There are three...

Page 8: ...f 3 sub assemblies They are the feed straps the tuning tube insulator and the matching network Figure 7 illustrates the 3 pairs of feed straps FL1 FL2 FL3 Refer to the Feed System Subassembly Parts List for the hardware required to install the straps Slide a feed strap insulator 832 on to each pair of feed straps to space and insulate the straps Elements may be rotated slightly during feed strap a...

Page 9: ...ghten bolts on boom bracket securing tuning tube insulator in place Reference Figure 7 and position the Tuning Tube Shorting Strap 555 1 2 inch from the tuning tube insulator Adjusting this strap will not have a significant effect on the VSWR of the X7 Tighten strap screws 554 82 84 82 84 Reference Figure 7C for matching network mounting Required hardware is listed in the Matching Network Subassem...

Page 10: ...ttaching the lower boom bracket 506 to the mast plate 542 Attach mast plate 542 to mast using U bolts 3209 and V blocks 35 Place the boom on the boom shelf during installation Loosely attach the top boom bracket 506 to the mast plate 542 and to the lower boom bracket 506 as shown in Figure 8A This allows the boom to be moved back and forth for tower top element mounting When all elements are secur...

Page 11: ...tates do not allow a limitation on how long an implied warranty lasts or exclusions or limitations of incidental or consequential damages so the above limitation and exclusion may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state This warranty does not extend to any products which have been subject to misuse neglect acc...

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