Directive Systems & Engineering DSE2424LYRM User manual

DSE2424LYRM Rev 4/21
Directive Systems & Engineering
2702 Rodgers Terrace
Haymarket, VA 20169-1628
www.directivesystems.com
703-754-3876
24cm Loop Yagi (Rear Mount), Model DSE2424LYRM
SPECIFICATIONS
Frequency Range: 1.24-1.27 GHz
Number of elements: 24
Boom Length: 72 inches
Boom diameter: 1 inch
Mast diameter: 2-inches max.
Weight: 4 pounds
Connector: Type N female
Gain: 18 dBi
-3 dB Beamwidth (E Plane): 30 °
F/B ratio: >20 dB
Maximum Power: 550 W. average
Stacking Distance:
E Plane 21 ¾” (55.25cm)
H Plane 19 ¼” (48.9cm)
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 hardware package.

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2) Antenna may be shipped in two sections; if so, the splice will be between Directors 11 &
12. Remove D11 from the front boom section and slide the two boom pieces together. Align
the reference marks on the boom, replace D11 and retighten.
3) Straighten any misaligned elements and tighten hardware if necessary. But do not touch
R1, DE or D1, as these have been factory set for minimum SWR.
4) Insert U-Bolt into rear mount bracket. Note that the bracket can be installed for either
vertical or horizontal polarization. (See drawings below)
(Can be up or down) (Can be left or right)
5) Attach the feed line, and tape it to the mast. The connector should be sealed with electronic
grade RTV or equivalent.
6) 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.
7) If antennas are to be stacked, see "Instructions for Stacking Loop 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.

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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.