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.

P a g e | 2

DSE2424LYRM Rev 4/21

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.

P a g e | 3

DSE2424LYRM Rev 4/21

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.

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