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22 Element 3.9 wl. K1FO Designed Yagi, Model DSEFO222-22 (w/boom sag)
D1
D5
BEFORE INSTALLING YOUR NEW ANTENNA, PLEASE BE SURE
DSEFO222-22 Rev 2/21
Directive Systems & Engineering
Haymarket, VA 20169-1628
BOOM TO MAST PLATE
LOCATION
D8
D9
D6
TRUSS BOOM CLAMP
BRACKET
ELECTRICAL SPECIFICATIONS
Frequency range: MHz ......................
Gain: dBd........................................... 15.8
Impedance: Ohms.............................. 50
Connector type................................... Type N (F)
Front -to- back ratio: dB...................... 22
SWR: Typical at resonance................ 1.12:1
Beamwidth 3dB: degrees
E- Plane ................................. 23º
H- Plane ................................. 24º
Sidelobe level: decibels
st
1
E- Plane ............................ -17.5
st
1
H- Plane ............................ -15.5
Power rating, Continuous: Watts ...... 1500
Stacking Distance: ft.(m)
E- Plane.................................. 11' (3.353)
H- Plane................................. 10'4" (3.150)
MECHANICAL SPECIFICATIONS
Boom length: in. (m.)........................... 28' 3/4" (8.553)
Turning radius: in. (m.)........................ 17' (5.182)
Weight Assembled: Lbs (kg.).............. 13 (5.90)
Max mast size: in. (cm.)....................... 2" (5.08)
Wind surface area: sqft (m. ) .............. 3 (.279)
Wind Survival: Mph (km/hr)................. 90+ (150)
TO READ THE ENCLOSED WARNING PAMPHLET.
2702 Rodgers Terrace
www.directivesystems.com
703-754-3876
28'-3/4"
D11
D12
TRUSS BOOM CLAMP
BRACKET
222-223
D15
D16
D17
D20
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Related Manuals for Directive Systems & Engineering DSEFO222-22
Summary of Contents for Directive Systems & Engineering DSEFO222-22
- Page 1 Directive Systems & Engineering 2702 Rodgers Terrace Haymarket, VA 20169-1628 www.directivesystems.com 703-754-3876 22 Element 3.9 wl. K1FO Designed Yagi, Model DSEFO222-22 (w/boom sag) BOOM TO MAST PLATE LOCATION 28'-3/4" TRUSS BOOM CLAMP TRUSS BOOM CLAMP BRACKET BRACKET ELECTRICAL SPECIFICATIONS Frequency range: MHz ......
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Page 2: Parts List
Tools needed: #2 Phillips screwdriver ¼” flat blade screwdriver soldering gun or large iron rosin core solder large needle nosed pliers keeper installation tool (supplied with kit) ruler with metric millimeter markings marking pencil DSEFO222-22 Rev 2/21... - Page 3 The rear side, with the tabs going outward, is the side that faces you. It is the side that goes face down into the element tool. Keeper Front side Keeper Rear side DSEFO222-22 Rev 2/21...
- Page 4 Figure 4. Referring to photo 1, push the pre-formed T-arm into the hole in the standoff insulator which has the hole rotated up slightly for easier installation. DSEFO222-22 Rev 2/21...
- Page 5 Once the T-arm is inserted all the way as in photo 2, slightly loosen the screw holding the insulator using a #1 Phillips screw driver. Rotate the T-arm so the end of the T-arm fits into the solder cup on the N connector (see photo 3) and tighten the Phillips screw. DSEFO222-22 Rev 2/21...
- Page 6 Next, insert the straight T-arm into the other standoff insulator until it is flush with the inside edge (see photo 4). Photo 4 Last, wrap the balun center conductor around the T-arms and solder (see photo 5) DSEFO222-22 Rev 2/21...
- Page 7 SWR bridge to obtain the lowest SWR. Note: The ends of the T-arms that extend past the shorting bars can be bent up toward the driven element, or down away from the driven element to obtain the best SWR. DSEFO222-22 Rev 2/21...
- Page 8 Attach the end of the boom sag to the boom sag bracket using a 10-32 X 1” screw and nylon lock nut. Do not over tighten. Snug the hose clamp slightly over the slits to hold it in place. DSEFO222-22 Rev 2/21...
- Page 9 DO NOT, UNDER ANY CIRCUMSTANCES, APPLY ANY TYPE OF SEALANT OR COATING TO THE DRIVEN ® ELEMENT, T-ARMS OR CONNECTOR ASSEMBLY, OTHER THAN KRYLON CLEAR COAT. ANY OTHER COATING WILL ADVERSELY AFFECT THE SWR AND VOID YOUR WARRANTY. DSEFO222-22 Rev 2/21...
- Page 10 This will complete the assembly of your DSEFO222-22. The construction of this antenna will provide many years of consistent performance with no degradation of performance due to corrosion and weathering.
- Page 11 ANY ANTENNA THAT HAS BEEN MODIFIED WILL BE SUBJECT TO A RESTOCKING CHARGE. IF AN ANTENNA IS SO MODIFIED AS TO MAKE IT UNUSABLE, DIRECTIVE SYSTEMS RESERVES THE RIGHT TO REFUSE TO ACCEPT THE ANTENNA FOR RETURN. DSEFO222-22 Rev 2/21...
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