Contents 1 Introduction 1.1 General Description and Purpose ......1.2 Tools Required ........1.3 QRO Keyline Upgrade .
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List of Figures 1.1 AT-AUTO QRO Keyline Upgrade Kit Contents ....(tm) 1.2 AT-AUTO Rear Panel prior to QRO Keyline Jack installation ..
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List of Tables 1.1 AT-AUTO QRO Keyline Upgrade Kit Contents ....(tm) www.KesslerEngineeringLLC.com...
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Thank-You! At Kessler Engineering, we endeavor to make your ham radio hobby more enjoyable and trust that our products will bring you many years of faithful service. We Thank-You for the confidence that you have placed in us and in our products.
AT-AUTO (tm) With the QRO Keyline, the user may configure the AT-AUTO (tm) to automatically prevent an HF linear amplifier from being keyed if the SWR exceeds a user-selectable level, to immediately unkey an HF amplifier should the SWR become excessive, or while the AT- AUTO is tuning.
Tools Required • #2 Phillips Head Screwdriver • Ruler and Pencil • Center Punch ′′ Drill • ′′ Wrench or Socket • • Wire Cutters • Small Needle-Nose Pliers • Soldering Iron and Solder • Volt-Ohm Meter or Electrical Continuity Tester www.KesslerEngineeringLLC.com...
4. Configure AT-AUTO firmware (tm) Preparation Turn off the AT-AUTO and remove power cord. The AT-AUTO’s top cover is held (tm) (tm) in-place by ten Phillips-head screws: five along the left and right sides, respectively. Begin by removing these ten screws. Be careful not to loose the ten plastic washers.
Figure 1.5: AT-AUTO Rear Panel with two holes added for RCA jacks (tm) www.KesslerEngineeringLLC.com...
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3. Ensure the microprocessor pins are fully seated in the socket. 4. Orient the Daughterboard over the vacated microprocessor socket on the AT-AUTO (tm) control board as shown in Figures 1.8 and 1.9 and very carefully align the Daughter- board pins with the control board socket and insert.
Wiring Harness Installation 1. Locate, cut, and remove the nylon wire ties running along the side of the AT-AUTO (tm) 2. Locate the wiring harness and attach the red connector to the Daughterboard as shown in Figure 1.10. 3. Route the wiring harness along the side of the AT-AUTO...
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RCA jack center pins. 5. Turn Off the AT-AUTO and re-install the top cover. (tm) 6. Refer to QRO Keyline instructions beginning on page 42 of the current AT-AUTO (tm) manual and configure the AT-AUTO firmware to provide the desired QRO Keyline (tm) behavior.
Service and Warranty Warranty Kessler Engineering, LLC. warrants all of our products to be free from defects in material and workmanship under normal use for a period of one year from the date of purchase. During this one-year warranty period, Kessler Engineering will opt to either repair or replace the product.
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