Directive Systems & Engineering DSEFO144-12, Manual

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Directive Systems & Engineering DSEFO144-12 Manual Download Page 7

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DSEFO144-12 Rev 8/19

FIGURES 5.

If you are installing multiple antennas, please be sure that you build each

antenna with the same T-match wire orientation. In the above drawing, the center pin
goes to the right hand side of the antenna as viewed from the back of the connector.
Make sure both antennas do the same! Proper phase relationship is very important
here!

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Summary of Contents for DSEFO144-12

Page 1: ...nt to back ratio dB 23 SWR Typical at resonance 1 2 1 Beamwidth degrees E Plane 34 H Plane 37 Sidelobe level decibels E Plane 19 H Plane 16 Power rating Continuous Watts 1000 Stacking Distance ft m E...

Page 2: ...parts there is always the possibility of sharp edges We strongly suggest checking the edges and use a fine file or 400 grit sandpaper to remove any burrs that may have been left Tools needed 2 Phillip...

Page 3: ...ements needed for assembly Take time to inventory each one and check off each dimension with Table 1 Some elements vary by 1 or 2mm in overall length so extreme care in measuring is called for here Ar...

Page 4: ...ngths one last time before final installation on the boom 6 The driven element is next Refer to the drawing in Figure 4 and the photos in Figure 5 for guidance The driven element slides through the bo...

Page 5: ...P a g e 5 DSEFO144 12 Rev 8 19 FIGURE 4...

Page 6: ...P a g e 6 DSEFO144 12 Rev 8 19...

Page 7: ...ase be sure that you build each antenna with the same T match wire orientation In the above drawing the center pin goes to the right hand side of the antenna as viewed from the back of the connector M...

Page 8: ...then the center conductor of the balun another 6 internal tooth lock washer the lug from the N connector another 6 internal tooth lock washer the T arm and screw into the insulator 8 Place a 8 interna...

Page 9: ...e adjust the shorting bars for minimum SWR Always keep the shorting bars th same distance from the ends of the driven element Generally good wattmeters can reliably indicate SWR down to about 1 2 1 A...

Page 10: ...e We take great pride in building a quality product that will give years of good service and performance If there is a defect in materials or workmanship within 90 days of purchase Directive Systems w...

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