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Table of Contents

Topic

Page

Table of contents

SteppIR - Why Compromise?

SteppIR Design

SmallIR vertical components

5-6

Antenna Assembly

7-13

Ground mounting of the SmallIR vertical

Installing the optional 1:1 balun

More about choosing radial systems for ground / above-ground installations

16-19

Using a vertical in or on salt water

SteppIR Warranty

Summary of Contents for SmallIR

Page 1: ...rt steppir com support Tel 425 453 1910 support steppir com Page 1 Revision 2 1 04 15 2020 13406 SE 32nd Street Bellevue WA 98005 www steppir com Tel 425 453 1910 FAX 425 462 4415 SmallIR Instruction Manual ...

Page 2: ...s 2 SteppIR Why Compromise 3 SteppIR Design 4 SmallIR vertical components 5 6 Antenna Assembly 7 13 Ground mounting of the SmallIR vertical 14 Installing the optional 1 1 balun 15 More about choosing radial systems for ground above ground installations 16 19 Using a vertical in or on salt water 20 SteppIR Warranty 21 ...

Page 3: ...cisely adjustable in length while in the air would solve the fre quency problem and in addition would have vastly improved performance over existing fixed length yagis The ability to tune the antenna to a specific frequency without regard for band width results in excellent gain and front to back at every frequency The SteppIR design was made possible by the convergence of determination and high t...

Page 4: ... 54 Wide x 008 Thick mounted in the element housing unit The copper beryllium tape is perfo rated to allow a stepper motor to drive them simultaneously with sprockets Stepper motors are well known for their ability to index very accurately thus giving very precise control of each element length In addition the motors are brushless and provide extremely long ser vice life The copper beryllium tape ...

Page 5: ...em QTY PART DESCRIPTION 1 70 3411 01 SmallIR EHU 1 10 1015 22 EHU Lid w No Vent Hole 1 10 1015 12 EHU Gasket 1 70 4001 01 SDA 100 Controller 1 70 4005 01 SDA 2000 Controller 1 20 8030 02 33V Power Supply 1 20 8040 01 Power Cord 1 71 0014 SmallIR Instruction Manual 1 SDA 100 Controller Manual 1 SDA 2000 Controller Manual 1 20 6208 01 25 Pin Male Connector 1 20 6209 01 25 Pin Back Shell 1 72 0003 21...

Page 6: ...dware 1 09 1022 08 8 Coax Seal 1 10 1028 01 Anti Seize Packet SmallIR Hardware Kit 72 0003 21 QTY PART DESCRIPTION 4 60 0019 10 32 Nylock Nut 4 60 0090 10 32 x 1 5 SS Screw 4 60 1004 01 0 5 Plastic Spacer SmallIR Coil Hardware Kit 72 0003 31 QTY PART DESCRIPTION 11 60 0019 10 32 Nylock Nut 2 60 0017 10 10 32 x 7 8 Flat Philips Screw 9 60 0061 10 32 x 7 8 Pan Philips Screw 11 60 0018 10 32 Flat Was...

Page 7: ... IS NO OTHER FOREIGN DEBRIS INSIDE THE POLE Secure polyolefin heat shrink to the telescoping pole joints The telescoping pole uses 3 polyolefin heat shrink pieces PN 10 1059 01 Once finished the seal is secure and waterproof This product requires a heat gun for activation of the adhesive When positioning the heat shrink place it so that the joint of the telescoping pole is cen tered in the middle ...

Page 8: ...ing Press the cap on approximately 1 1 8 Do NOT press the cap down so hard as to crimp damage the cross tube preventing the pole from properly venting Prepare and Install the Solderless Connector Remove the 4 pin solderless connector from inside the EHU Prepare the 4 conductor control cable by re moving 1 of insulation from the end of the cable and stripping 1 4 of insulation from the ends of each...

Page 9: ...the gasket between the EHU and lid and fasten together using the 7 8 Pan head screws washers and nuts Place the washer between the Pan head screw and the EHU with the nut on the cov er side See the picture to the right for ref erence Note the two countersunk holes in the lid The countersunk screws will be placed in these holes with the washer and nuts being placed on the EHU side Tighten firmly bu...

Page 10: ... not shift or settle over time using concrete to secure it in the ground is a way to eliminate the potential for this problem Position the mounting pole machined end up so that the bot tom of the element housing is 6 inches above the ground After the mounting post is in place and level you are ready to erect your SteppIR Vertical Mount EHU Onto the Mounting Post A rubber quick disconnect boot must...

Page 11: ...element housing tube The small end of the boot goes on the pole first about 8 up from the butt Slide the butt large end of the telescoping fiberglass pole into the element support tube EST until it is firmly bottomed Push the rubber boot down firmly onto the element hous ing tube until it bottoms out and tighten the two clamps This boot will prevent water from getting into the element housing unit...

Page 12: ...tween the back shell halves as shown in figure 5 22 and secure with the provided hardware CONNECTING CONTROL CABLE TO THE OPTIONAL DB25 FIELD SPLICE The optional DB25 Field replaces the standard connector with a con venient solder less connection of the control cable to the SteppIR con troller If you purchased this option follow the steps below to connect it to your control cable 1 Apply the provi...

Page 13: ...TE 11 ORANGE BLACK STRIPE PINK PINK PINK 12 GREEN CREME CREME CREME 13 BLACK RED STRIPE WHITE ORANGE STRIPE 14 ORANGE GREEN STRIPE WHITE BLACK STRIPE 15 WHITE BLACK RED WHITE RED STRIPE 16 RED BLACK WHITE WHITE GREEN STRIPE 17 BLACK WHITE RED WHITE ORANGE STRIPE 18 GREEN WHITE STRIPE 19 GREEN BLACK STRIPE 20 RED 21 RED WHITE STRIPE 22 WHITE RED STRIPE WHITE RED STRIPE 23 RED BLACK STRIPE WHITE BLA...

Page 14: ...ecommend using a lug connector at the end of your radials and then tightening the lug onto the connector post shown in Figure 19 If you purchase optional radial kits Figure 13 you will notice there are 4 wires per set all soldered and crimped to a lug connector Figure 15 Figure 19 Ground Figure 17 Mounting Pole Ground Radials 4 16 16ga insulated ...

Page 15: ...ed RF signal from the coax shield When Should You Use A Balun When elevating the base of a vertical antenna above the ground When only a few radials are used When the coax run is shorter than the radials When the ground condition is poor Unusual SWR readings on one band Balun Installation The balun is shown in figure 25 There is a mount ing flange with 4 holes molded into the housing There are num...

Page 16: ...ystem As you might expect you pay a price for such a small counterpoise system less efficiency As you will see in the following pages you can get fairly high efficiency with a relatively modest radial system that will far outperform small counterpoise systems It should be noted that counterpoise systems are only good for curing near field losses caused by losses from the earth which is a poor cond...

Page 17: ...sting and fine tuning the ra dial lengths Ground Mounting If you chose to ground mount the vertical pick a spot that will allow you the best chance of spreading your radials evenly around the antenna and away from trees and other objects if pos sible Mount the antenna within one foot of ground if possible the closer to ground the better Next you will need to determine how much effort and wire you ...

Page 18: ...t lay the radials out in a symmetrical radial pattern don t worry too much it will distort your omni directional pattern slightly but won t reduce your efficiency very much Lay the radials out in the best manner possible given your situation There are various ways to ac complish laying a radial system including turning corners etc Good results are limited only to your creative energy and determina...

Page 19: ...e ground losses start to increase unless you have very good ground When a vertical is raised off the ground the impedance drops fairly rapidly from 36 ohms Over perfect ground or with many radials it will be close to 36 ohms over real ground it is generally 40 60 ohms to about 22 ohms when 3 wavelength is reached This would make a pretty poor match to 50 ohms so a couple of tricks are in order Onc...

Page 20: ...vertical can offer unparalleled perfor mance for low angle DX Simply mount the vertical to the dock and attach two radials per band of operation They can be stapled right to the dock if it is non metallic Mounting the vertical in ground flooded by salt water a couple of times per day can be equally effective Proximity to the ocean improves the far field loss of a vertical and allows very low angle...

Page 21: ...ission of SteppIR Antennas Inc This limited warranty is automatically void if the following occurs improper installation unauthorized modifications physical abuse or damage from severe weather beyond the manufacturer s control Manufacturer s responsibility is strictly limited to repair or replacement of defective components The shipping instructions will be issued to the buyer for defective compon...

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