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DSEDPM144-5LVA Rev 10/20 

Directive Systems & Engineering 

                     2702 Rodgers Terrace

 

              Haymarket, VA 20169-1628 

                             www.directivesystems.com 
                                      703-754-3876 

 

5 Element 144-148 MHz (Rear/Center Mount) Yagi,  

Model DSEDPM144-5LVA 

                                                                 

 

                                                      ELECTRICAL SPECIFICATIONS

 

                                         

             Frequency range: MHz ..................... 144-148 

 

Gain: dBd...........................................  9.0 

 

Impedance: Ohms.............................. 50 

 

Connector type................................... Type N(F) UG-58/U 

 

Front -to- back ratio: dB...................... 20 

 

SWR: Typical at resonance................ 

1.2:1 

 

Beamwidth: -3 degrees 

 

E- Plane ................................. 52° 

        -10 dB ................................. 89.6° 

 

 

H- Plane ................................. 65° 

 

Sidelobe level: decibels 

 

E- Plane ................................. -17 

 

H- Plane ................................. -16 

 

Power rating, Continuous: Watts ......   1500 

 

Stacking Distance: in.(m) 

 

             E- Plane.................................. 72

” (1.829) 

      

              H- Plane.................................  66

” (1.676) 

 

 

     MECHANICAL SPECIFICATIONS 

 

   Boom length: in. (m.)........................... 67

” (1.7) 

   Turning radius: in. (m.)........................ 34

” (.863) 

  Weight Assembled: Lbs (kg.).............. 2.8 (1.27) 
  Max mast size: in. (cm.).......................2

” (5.08) 

  Wind surface area: Ft

2

 (m.

2

) ............... 0.5 (.046) 

  Wind Survival: Mph (km/hr)................. 100 (160) 

 

PARTS LIST 

                                                    Note:  All hardware is Stainless Steel unless otherwise noted. 

 
Anti-Seize Compound

 

– Apply a small amount of the supplied Anti-Seize Compound to the aluminum joints and 

to the threads of the U-Bolts to prevent galling.

 

Содержание DSEDPM144-5LVA

Страница 1: ... E Plane 52 10 dB 89 6 H Plane 65 Sidelobe level decibels E Plane 17 H Plane 16 Power rating Continuous Watts 1500 Stacking Distance in m E Plane 72 1 829 H Plane 66 1 676 MECHANICAL SPECIFICATIONS Boom length in m 67 1 7 Turning radius in m 34 863 Weight Assembled Lbs kg 2 8 1 27 Max mast size in cm 2 5 08 Wind surface area Ft2 m 2 0 5 046 Wind Survival Mph km hr 100 160 PARTS LIST Note All hardw...

Страница 2: ...d pliers keeper installation tool supplied with kit ruler with metric millimeter markings marking pencil ASSEMBLY INSTRUCTIONS 1 The antenna components should be removed carefully from the shipping container and the individual parts counted and checked for completeness Be careful to check all tubing pieces for elements and hardware that may be packed inside 2 The element bundle contains all of the...

Страница 3: ...taching the keepers Be careful as the keeper cannot reverse direction if you overshoot the line You must push the keeper all the way to the end and start over A good trick is to install the element in a bench vise with the scribed line flush with the edge of the vise jaws Push the keeper until it is against the edge of the jaws This way it is impossible to overshoot the scribed line Again be aware...

Страница 4: ...a keepers are supplied but care is definitely required here Check your work as you go Proceed with the next element in similar fashion Check off each element on Table 1 to monitor your progress Double check element lengths one last time before final installation on the boom 5 The driven element is next Refer to the drawing in Figure 4 and the photos in Figure 5 for guidance The driven element slid...

Страница 5: ...P a g e 5 DSEDPM144 5LVA Rev 10 20 FIGURE 4 ...

Страница 6: ...P a g e 6 DSEDPM144 5LVA Rev 10 20 ...

Страница 7: ...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 ...

Страница 8: ...ing the driven element and the T arm support bracket then the two ground lugs from the balun then a 8 internal tooth lock washer and nut Tighten securely 8 Last pass 8 32 X 1 screws through the holes in the shorting bars and place a split lock washer and nut on the other end Slide the shorting bars over the ends of the driven elements and over the T arms and measure from the boom to the inside edg...

Страница 9: ...ate for any installation The aperture of this antenna is large enough so that you must elevate the antenna a minimum of about 10 feet or 3 0 m above the ground Point the antenna so that there are no reflectors or obstructions for 100 feet directly in front of the beam A better method would be to point the antenna straight up toward the sky Support the antenna on a wooden or metal pole or tube and ...

Страница 10: ...nsions supplied your SWR should match our plot This will complete the assembly of your DSEDPM144 5LVA The construction of this antenna will provide many years of consistent performance with no degradation of performance due to corrosion and weathering ...

Страница 11: ...in materials or workmanship within 90 days of purchase Directive Systems will repair or replace the defective part free of charge to the original purchaser DO NOT RETURN ANYTHING WITHOUT PRIOR AUTHORIZATION FROM DIRECTIVE SYSTEMS Please contact us either by phone or email describing the problem and we will work to resolve it If after examining a new antenna you received you are not satisfied conta...

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