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DSE3318LYRMK Rev 3/21
CAUTION:
While we strive to remove all burrs from all machined parts, there is always the possibility of
sharp edges. We strongly suggest checking the edges and use a fine file, or 400 grit
sandpaper, to remove any burrs that may have been left.
ASSEMBLY INSTRUCTIONS
1)
Attach loops to the boom with 4-
40 x 1 ¼” screws and lock 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 ¼
inch nut driver is almost mandatory for this job! Attach the driven element with the 5/16
” nut
provided. If only a single antenna is being built, it doesn't 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 angle bracket (angle piece) behind the second reflector R2.
The bracket can be installed for either horizontal or vertical polarization. Install U-bolt and
saddle on the bracket.
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
