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308 Industrial Park Road, Starkville, MS 39759 USA
Ph: (662) 323-9538 FAX: (662) 323-6551
INSTRUCTION MANUAL
GENERAL DESCRIPTION
This model is a 3-element beam tuned for
maximum forward gain over the entire 10-meter
band. Both the antenna and the "beta match" are
factory pretuned for maximum performance. The
elements are made of taper-swaged tubing. The
bracket will fit a 2" diameter mast. The electrical
hardware is made from super strength stainless
steel and all element tubing clamps are stainless
steel.
VSWR AND FEEDLINE
This 10-meter beam is designed for use with a
50-ohm coaxial cable. A RG-213/u coaxial cable
is recommended for lower losses and higher
power handling capabilities.
*Gain, Front-to-Back ratio verified by MININEC 3 and YAGI OPTIMIZER computer codes along with radiation pattern
measurements of full size antennas on Hy-Gain's test range.
LJ-103BA
Long John MonoBander
3-Element, 10-Meter Beam
The antenna requires a coaxial choke (or balun) to
prevent unbalanced current from flowing down
the transmission line and affecting the efficiency
and match of the antenna.
FOR OUR OVERSEAS CUSTOMERS: The
United States uses U.S. units of measurements.
Please see the Metric Conversion Chart for
assistance in identifying the hardware and
components supplied with this product.
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Summary of Contents for Hy-Gain LJ-103BA
- Page 1 50-ohm coaxial cable. A RG-213/u coaxial cable is recommended for lower losses and higher power handling capabilities. *Gain, Front-to-Back ratio verified by MININEC 3 and YAGI OPTIMIZER computer codes along with radiation pattern measurements of full size antennas on Hy-Gain's test range.
- Page 2 ELEMENT-TO-BOOM BRACKET UNPACKING Select a set of small sized element-to-boom Unpack the antenna and check the parts brackets (Item 9) and loosely assemble them against the Parts List and the drawings. This on one end of the boom approximately 2 3/8" will simplify the antenna assembly.
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Page 3: Installation Of Tubing Clamps
After adjustment of the tubing lengths, tighten INSTALLATION OF the clamp with 5/16 inch nut driver, socket, TUBING CLAMPS or open end wrench until the tubing will not When installing the clamps, place the clamp twist or telescope. near the tube end with the top of the clamp centered over the slot in the tube as shown in Figure 3. - Page 4 Select the R2 sections (Item 3), 5/8" 24" and slip the unswaged ends into the R1 sections. Adjust the tubing to the dimensions shown in Figure 5. Now tighten the tubing clamps securely. Figure 5 Reflector Element Select the R3 sections (Item 4), 7/16" x 48" These VSWR curves are typical for this and slip them into the R2 sections (Item 3).
- Page 5 Adjust the sections (Item 4) to the dimen- Select two #6 tubing clamps (Item 16) and slip them on the swaged end of the DE1 sion shown in Figure then install a #6 sections (Item 1). Position them as shown in tubing clamp (Item 16), and tighten securely.
- Page 6 Updated 3/27/24 Figure 8 Overall View CAUTION Be certain to use the same mode for dimensions on all elements. D I R E C T O R E L E M E N T Select the Dl sections (Item 1), 7/8" x 24" and Select the remaining element-to-boom brackets slip the unswaged ends into the bracket and loosely assemble them on the boom 50 5/8"...
- Page 7 Select the D3 sections (Item 7) 7/16" x 55" and Carefully recheck the 50 5/8" measurement from slip them into the D2 sections (Item 6). Adjust to the center of the driven element bracket to the the dimension shown in Figure 8 for your mode center of the director bracket and check to see that of transmission, then install and securely tighten the director will lie in the same plane as the...
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Page 8: Final Assembly
SWR when used with this antenna. For best driven element. The recommended feedline is results, use the Hy-Gain BN-86, 50 ohm balun. RG-213/U (such as Belden 8267). Other types of The Model BN-86 is available at your local Hy- 50 ohm coaxial cable may be used if proper Gain dealer. -
Page 9: Installation And Grounding
MA-0000-A-048 MA-0000-A-048 MA-0000-A-048 MA-0000-A-048 INSTALLATION AND GROUNDING The antenna is now ready to be mounted on your mast. A proper ground consist of a 1/2" x 8' copper- clad ground rod driven into the ground 12 inches from the base of the supporting structure. Connect the ground rod to the supporting structure using a #8 or larger cooper wire and commercial non-corrosive ground clamps. - Page 10 PARTS LIST (Continued) Item Part No. Description 871986-1 Parts Pack 239S-1, stainless steel...............1 163312 Clamp, 7/8" tubing ................2 166084 Clamp, beta ...................2 358756 Clamp, #6 tubing.................12 (Not Used) 455630 Caplug, 1 1/4" ..................2 463767 Insulator, driven element...............2 475639 Caplug, 7/16" ..................6 504069 Bolt, #10-24 x I", hex head ..............6 565697...
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Page 11: Limited Warranty
Hy-Gain Warrants to the original owner of this product, if manufactured by Hy-Gain and purchased from an authorized dealer or directly from Hy-Gain to be free from defects in material and workmanship for a period of 12 months for rotator products and 24 months for antenna products from date of purchase provided the following terms of this warranty are satisfied.
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