DSEFO144-12XPOL Rev 2/21
Directive Systems & Engineering
2702 Rodgers Terrace
Haymarket, VA 20169-1628
www.directivesystems.com
703-754-3876
24 Element 2.5 wl. Dual Polarity K1FO Designed Yagi,
Model DSEFO144-12XPOL
ELECTRICAL SPECIFICATIONS
Frequency range: MHz ......................144-146
Gain: dBd........................................... 12.6 dBd (14.75 dBi)
Impedance: Ohms.............................. 50
Connector type................................... Type N(F) UG-58/U
Front -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- Plane.................................
11’7” (3.53)
H- Plane.................................
10’8” (3.25)
MECHANICAL SPECIFICATIONS
Boom length: ft. (m.)...........................
19’ (5.79)
Turning radius: in. (m.)........................ 1
2’ (3.65)
Weight Assembled: Lbs (kg.).............. 12 (5.44)
Max mast size: in. (cm.)....................... 2
” (5.08)
Wind surface area: Ft (m. ) ................. ~2 (.18)
Wind Survival: Mph (km/hr)................. 100 (160)
PARTS LIST
Note: All hardware is Stainless Steel, unless otherwise noted.
Boom
1 1/4" Rea r Boom s ecti on
1 (Red on front-wi th both Hori z & Vert el ement hol es -doubl e wa l l thi cknes s )
1 3/8" Center Boom s ecti on
1 (Bl ue on front a nd Red on rea r-wi th both Hori z & Vert el ement hol es )
1 1/4" Front Boom s ecti on
1 (Green on front a nd Bl ue on rea r-wi th both Hori z & Vert el ement hol es )
1 1/8" Front Boom extens i on
1 (Green on rea r)
El ement Bundl e
1/4" El ements
22
1/2" Dri ven El ement
2
3/8" T-a rms
4
