Summary of Contents for JK Antennas JK-401
- Page 1 JK-401 40M Hi-Q Coil Loaded Rotatable Dipole 2018 Version 72 Grays Bridge Road, Unit D, Brookfield, CT 06804 845.228.8700 (TEL) ▪ 845.279.5526 (FAX) ▪ info@jkantennas.com LAST UPDATED: 02-01-2018...
- Page 2 JK Antennas Limited Warranty and Liability JK Antennas (“Manufacturer”) warrants to the original purchaser that this product will be free from defects in material, and workmanship for a period of one (1) year from the date of purchase. The determination of whether any part or parts will be covered by this limited warranty and whether any part or parts will be repaired, replaced or refunded will be solely determined by JK Antennas.
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Page 3: Tools Required
TOOLS REQUIRED This antenna uses all SAE standard tool sizes. Metric fasteners are not used on this antenna. Ensure hex keys used are SAE sizes to avoid stripping the socket cap screw heads. Size Description 5/16” Nut driver, socket or wrench (for #6-32 nylon lock nuts) 11/32”... -
Page 4: Assembly Guidelines
JK401 – Hi-Q Coil Loaded Rotatable Dipole ASSEMBLY GUIDELINES 1. Open the boxes and lay out the elements, hardware kits and parts 2. Using the parts list at the end this document, check to make sure all tubing, hardware kits and parts are included (extra numbers of bolts, screws, nuts and washers are included) 3. - Page 5 Slide one end of the fiberglass rod inside the end of one aluminum tube and align the holes. Place the shorter screw on the hole away from the center and tighten using a nylon nut. Place the longer screw through the hole closer to the center with a serrated lock washer on each side and tighten with a nylon nut.
- Page 6 After the above alignments are completed, tighten the screws on the black clamps evenly, alternating between each bolt. Do not apply all the torque to one bolt at a time, as this raises the chances of galling occurring when the opposite bolt is tightened. The gap between the blocks should just close when the torque is correct, and there should be an even amount of thread sticking out above each nut.
- Page 8 10-24 holes (outside) to attach fiberglass rod to aluminum tubes 1/4" holes (inside) to mount the coil Now, to attach the coils, follow these steps: Place a serrated/tooth washer (LW14ExT) onto a 1/4"-20 screw, and insert into one of the 1/4”...
- Page 9 Follow these same steps with the remaining hole on the other side of the fiberglass rod, but this time insert the screw from the opposite side of the rod. Wrap the provided silicone tape over the exposed section of the fiberglass rod (this tape has no adhesive, so it only bonds to itself –...
- Page 10 NOTE: It is very important to have a solid mechanical connection, with the nut and screw making a tight contact over the tubing. Visually inspect the coil assembly for any twists or non-symmetry while tightening these nuts. Adjust them carefully by pulling them back into place.
- Page 11 Continue to assemble and attach the progressively smaller tapers of aluminum tubing, using the appropriate hardware, as shown in the table above. Exposed 36” 30” 30”+18” 33” 21” 21” 33” 33” Length Length Tubing 1.75” 1.5” 1.25" 1" .875" .75" .625 .5"...
- Page 12 STEP 3: Balun Assembly Insert serrated lock washers (LW10ExT) from the 40M Dipole Element Hardware Kit onto the longer center exposed screws of the Dipole Element. Next, mount the balun “ L” leads onto the exposed screws Insert another serrated lock washer on each screw Insert the Nyloc Nut (NN1024) and tighten, but be careful NOT to over-tighten Insert and screw another plain hex nut or KEPS nut, which will act as a lock if necessary Insert the balun on the other side of the “L”...
- Page 13 (WARNING !! PLEASE DO NOT ADJUST or SPREAD THE COIL SENT FROM THE FACTORY) Use the supplied lock washer and nuts and tighten. Attach the coax to the balun and tape the coax to the Mast. STEP 4: Mounting Dipole on Mast When assembly is complete, mount the dipole onto the mast using the Mast to Mast Plate Kit.
- Page 14 STEP 5: Antenna Final Check and Test - Prior to Installation Dimensions: Although the element lengths are set from the factory, it is highly recommended that you take the time to document and check all the dimensions of your assembled antenna with factory dimensions. Hardware Installation: Verify that all the hardware has been tightened and there are no loose fasteners.
- Page 15 JK401 Parts List MAST TO ELEMENT ASSEMBLIES Mast Plate Mast to Element Channel Plate Mast Plate to Element Channel HH3816 1" Hex Head Screw 3/8-16 NN3816 Plain Hex Nut 3/8-16 Mast to Mast Plate U-Bolt 2" ID 3/8" U-Bolt for Mast Mounting 40M Channel Assembly 40M Channel-1 40M Element Center Plate...
- Page 16 Element Assembly Hardware SH1024-1 1-1/2" Socket Head Screw 10-24 SH1024-3 2" Socket Head Screw 10-24 SH1024-4 2-1/4' Socket Head Screw 10-24 NN1024 Nylon Nut 10-24 10+2 SH832-3 1-1/4" Socket Head Screw 8-32 SH832-1 1" Socket Head Screw 8-32 NN832 Nylon Nut 8-32 SH632 Socket Head crew 6-32 NN632...