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DSE945LYRMK Rev 12/20
(Can be up or down)
(Can be left or right)
ASSEMBLY INSTRUCTIONS
1)
Assemble the boom, the splice is between elements D24 & D25 and is secured by the
loop mounting screws of D22, 23 & 24. Attach loops to the boom with 3-48 x 3/4" screws, lock
washers and nuts in proper sequence. Loops go on the side of the boom marked with an "X".
Attach the contents of each bag of elements before opening the next bag. This will prevent
any mix-up of elements on the boom.
When tightening the nuts on the parasitic elements, be
careful not to torque them too tightly. Snug down the nuts, align the elements and use a
screwdriver for the final tightening. A 3/16" nut driver is almost mandatory for this job! Attach
the driven element with the 5/16” nut.
If only a single antenna is being built, it does not matter
which way the loop is oriented. If antennas are to be stacked, see "Instructions for Stacking Loop
Yagis."
2)
Attach the boom-to-mast bracket with the angle bracket and 8-32 X 1" hardware. Use
the two large holes on the rear boom piece. Install the 3" X 4" flat plate with 8-32 X 1/2
”
hardware provided. Install U-bolt on the flat plate so that the mast is directly under the boom.
3)
Install the cable assembly through the hole in the driven element mounting bolt. Make
sure the connector bracket is correctly oriented, the bend should be forward for center mount
antennas and rear facing for rear mount antennas. Solder the outer shield to the driven loop
first making sure there is no shield sticking above the large hole in the driven loop. After the
shield is soldered, pass the center conductor through the small hole in the driven loop and
bend the center conductor over and solder (See Assembly Tips below).
We have created a You Tube video, the link of which can be found on our website,
documenting the following steps:
https://youtu.be/ojXbsDv5cvU
At this point the connector assembly is facing down, connect a piece of coax and your
SWR bridge or VNA. Pull down on the connector (which will flatten the loop) until you reach
the lowest SWR. If it’s less than 1.5:1 you can stop and make sure the loop doesn’t try to pop
back up, sometimes you have to squeeze the loop with your fingers to make sure it stays in
