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Summary of Contents for LS 108

Page 1: ...ASSEMBLING MANUAL LS 108 HF Log Periodic Antenna 14 30 MHz ...

Page 2: ...30 МHz continuously Gain average 9 5 dBi Front to Back Ratio 20 dB Nominal Input Impedance 50 Ohm SWR typ 1 5 1 Maximum Input Power 1500 W continuously 3000 W PEP Boom Length 8 m 26 25 ft Boom Diameter 50 mm 1 97 Mast Diameter 50 mm 1 97 Longest Element 11 m 36 1 ft Turning Radius 6 8 m 22 3 ft Wind load Area 1 5 m2 16 15 sq ft Wind Survival no ice 145 km h 90 0 mph Weight Operating 30 kg 67 lbs S...

Page 3: ...r blocks and each element is driven by the phase line 2 1 Boom Assembly The boom is composed of four pieces sections which are to be assembled together The section ends to be joined together are marked by letters A A B B and C C directly on the tubes Sections have the element supporting insulators mast bracket balun transformer and the boom guys readily installed in the factory You will find the r...

Page 4: ...nstallation They have the same marking 1L and 1R Lay the two half elements in the corresponding channels Select two bolts M5x60 mm and place a plain flat washer on each bolt Align the mount holes of the half elements and the insulator Push the two bolts upside down through insulator and half elements Use the holes located next to the boom Please note that the bolts heads are underside of insulator...

Page 5: ...arest strap insulating spacer located between ELEMENT 10 and ELEMENT 9 Together with the cable fasten also the legs skirts on the two strap spacer sides see Fig 5 Phase line straps mounting Continue fastening the cable with two ties at each spacer until you reach the mast Now fasten also the strap insulating spacers in the other part of the boom although there is no cable there 2 6 Boom to Mast As...

Page 6: ...sulator and get the element horizontal Now tighten properly all the nuts that hold the phase line remember the caution note in S 2 4 Attachment of Phase line Straps Do not over tight Check all antenna dimensions per Table 1 Half Element Lengths and Fig 9 LS108 Dimensional Drawing before to start lifting the antenna on your permanent tower structure Check the quality of all mechanical and electrica...

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