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DB11 Yagi Assembly Manual REV 4 01/09/20 SteppIR Communication Systems | 13406 SE 32 St. Bellevue, WA 98005 | 425.453.1910 | sales@steppir.com...
Securing the coax and control cable to the boom …………………………………………………………. 16 Wiring the element housings…………………………………………………………………………………. DB25 connector wiring diagram……………………………………………………………………………… 17 Preliminary wiring and EHU testing………………………………………………………………………….. 18 Preparing the telescoping poles……………………………………………………………………………… 21 Mounting the poles to the EHUs……………………………………………………………………………... 23 Limited Warranty………………………………………………………………………………………………. Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
DB11 Yagi – Component Checklist (72-2011-01) Use this list to ensure that everything you ordered has been included in the shipment It is a good idea to mark the options you have purchased, for future reference. MAIN ANTENNA BOX PART NUMBER...
DB11 Yagi – Component Checklist (Continued) (72-2011-01) BOOM BOX PART NUMBER ITEM 10-1202-01 1-3/4 inch x 72 inch boom section 10-1202-61 1-3/4 inch x 62 inch boom section 10-1203-31 1-1/2 inch x 8 inch boom splice DB11 Yagi - Antenna Kit Contents...
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09-1025 Conical Grinding Stone 10-1028-21 Anti-Seize Stick Polyolefin Heat Shrink 1-1/2” x 3” 10-1059-01 10-1619-01 Coax switch bracket 60-0150 Cap for return tube .843 60-1006-41 Boot, DB11 return 60-6000-50 Hose Clamps, Type M Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
Figure 1.2 Figure 1.1 6 Pin Header Wiring Sequence 4 Pin Header Wiring Sequence (EHU’s with Relays) (EHU’s without Relays) BLACK GREEN WHITE BLUE BROWN BLACK GREEN WHITE TERMINAL PLUG Figure 1.5 TERMINAL HEADER Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
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Repeat wiring and coax seal preparation for each EHU. When finished, the EHU’s will be secured to the aluminum element mounting plates. This is covered in detail later. Figure 1.6 Figure 1.7 Figure 1.8 Figure 1.9 Figure 1.10 Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
Use of a level for adjusting the Element Housing Units (EHU’s) is highly recommended. This is a surprisingly accurate and consistent method. Simply place the level on the mast plate and adjust each element accordingly. Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
• Repeat this for each section until the boom is completely assembled as shown in figure 2. Figure 2 Boom Assembly QTY 4: 60-0065 5/16 x 3-1/2 BOLT Add lubricant here QTY 16: 60-0041 1/4 Washer QTY 4: 60-0030 1/4 Nylock Nut Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
4 below. All dimensions are taken from the center of the element, which is the center-point of the fiberglass tube that houses the copper beryllium strip, both at the EHU and at the return EST. Figure 4 Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
DO NOT secure the lid and gasket to the enclosure until the final testing has been completed. Figure 6 Control Wiring for Coax Antenna Switch COAX Switch w/Housing Removed Control cable to Connector Junction Box Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
Coax Switch Bracket QTY 4: Flat Head Screw (Located in small Ziplock bag QTY 2: 60-0113 #10 x 5/8 SS Pan Head DIRECTOR EHU QTY 2: 60-0046 QTY 2: 10-1601-03 5/16” Nylock Nut Aluminum Saddle Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
Figure 9 Bottom View of Coax Antenna Switch Director EHU Feed from shack OUT 2 OUT 3 Control cable that will be OUT 1 wired into the connector box. Reflector EHU Driven EHU Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
By default your antenna comes with a 25 pin connector which requires soldering. A solderless Dsub field splice connector is available as an option. Pay close attention to match the wire color with the correct pin number, incorrect wiring may damage your controller or EHUs! Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
9. Set the controller to any frequency in the 17m band. 10. When the controller indicates it is no longer trying to move the elements (the LED labeled “Tuning” will stop flashing) RECONNECT the control cable again. Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
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20m and is disconnected by the Coax Switch Box. The REF EHU should now measure as an OPEN circuit (very high resistance, no continuity) between the coax connector center pin and EACH of the copper tapes. Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
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25. Push “POWER” and the controller will now turn off. DISCONNECT the control cable. 26. This concludes the tests and verifies the antenna is wired correctly and that all of the relays are switching correctly. Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
• Once the heatshrink has cooled, follow the instructions on the following page to prepare the fiberglass elements. Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
Using the 1/4 inch bolts, nuts and return brackets, secure the element return tubes to the boom as shown earlier in figure 5. Figure 12 Figure 11 Black raised ring used to keep rubber boot secure. Tech Support: www.steppir.com/support | 425.453.1910 | support@steppir.com...
This can be obtained at www.steppir.com. Shipping instructions will be issued to the buyer for defective components, and shipping charges to the factory will be paid for by the buyer. SteppIR will pay for standard shipping back to the buyer. The manufacturer assumes no further liability beyond repair or replacement of the product.
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