Directive Systems & Engineering DSE1327LYRM User manual

DSE1327LYRM Rev 10/20
Directive Systems & Engineering
2702 Rodgers Terrace
Haymarket, VA 20169-1628
www.directivesystems.com
703-754-3876
13cm Loop Yagi (Rear Mount), Model DSE1327LYRM
SPECIFICATIONS
Frequency range: 2.3 to 2.4 GHz Gain: ≅18.5 dBi
Number of elements: 27 3 dB Beamwidth
Boom length: 48 inches (E plane): ≅20º
Boom diameter: 0.5 inches F/B ratio: ≥20 dB
Mast diameter: 1 1/2 in. max Maximum Power: 400 W average
Weight: (assembled) 1pound assembled Stacking distance: 15 in. vertical (H)
Connector: Type-N female 16 in. 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 the antenna and locate the hardware package. The boom is in one piece and
requires no assembly. Observe that the boom to mast bracket is installed on the rear of the
boom.

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DSE1327LYRM Rev 10/20
2) 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.
3) 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)
4) Attach the feed line, and tape it to the mast. 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) 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.
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.