Directive Systems & Engineering DSE1445LYA User manual

DSE1445LYA Rev 4/21
Directive Systems & Engineering
2702 Rodgers Terrace
Haymarket, VA 20169-1628
www.directivesystems.com
703-754-3876
2000-2100 MHz Loop Yagi, Model DSE1445LYA
SPECIFICATIONS
Frequency Range: 2.000-2.100 GHz (any 25 MHz segment)
Number of elements: 45
Boom Length: 90 inches
Boom diameter: 0.625 inch
Mast diameter 1 1/2 inch
Weight (Shipping) 3 pounds
Connector: Type N female
Gain: ≅20.0 dBi
3 dB Beamwidth (E Plane): ≅16 degrees
F/B Ratio: ≥ 20 dB
Maximum Power: 400 Watts average
Stacking distance: 15 inches Vertical (H)
17 inches Horizontal (E)
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.
BEFORE INSTALLING YOUR NEW ANTENNA, PLEASE BE SURE
TO READ THE ENCLOSED WARNING PAMPHLET.
ASSEMBLY INSTRUCTIONS
1) Unpack antenna and locate the two preassembled antenna sections and the hardware
package. The boom is broken between elements D22 and D23. Remove D22 from the boom
piece and slide boom pieces together to alignment marks. Replace D22 and retighten. (D22 is
the element approximately 0.5 inch from the end of the boom section; it will only fit together
one way.) The booms are marked for your assembly.
2) Straightenanymisalignedelementsandtightenhardwareifnecessary. But do not
touch R1, DE or D1, as these are factory set.
3) Attach the boom to mast plate to the boom with the hardware provided. Install the U-
bolts so that the mast comes up directly under the boom.

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DSE1445LYA Rev 4/21
(Can be up or down) (Can be left or right)
4) Attach the feed line and tape it to the bottom of the boom. The connector should be
sealed with electronic grade RTV or equivalent.
5) The antenna SWR has been adjusted at the factory for less than 1.5:1. Additional
tweaking can be accomplished by adjusting the distance between the driven element and R1
and D1, or by adjusting the shape of the driven element. NOTE: Do not attempt this
adjustment unless the proper equipment and qualified personnel are available.
6) Ifantennasaretobestacked,see"InstructionsforStackingLoop Yagis"
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.
Directive Systems Warranty Policy
All Directive Systems antennas are built with the finest materials available. 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 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, contact us immediately
for return authorization and refund. 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.