CU-1658_CU-1669_antenna_coupler_serv_TM11-5985-326-35_1972.pdf

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CU-1658_CU-1669_antenna_coupler_serv_TM11-5985-326-35_1972.pdf

TM 11-5985-326-35 TECHNICAL MANUAL DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL COUPLER, ANTENNA CU-1658/A AND CU-1669/GRC HEADQUARTERS, DEPARTMENT OF THE ARMY MARCH 1972 WARNING DANGEROUS VOLTAGES are used in the operation of this equipment. DEATH ON CONTACT may result if safety precautions are not observed. Electrical potentials up to 400 volts dc exist in the receiver-transmitter to which the antenna coupler is connected when the radio set is energized. Do not make contact with exposed wires or connectors when the equipment is energized. WARNING Operator and maintenance personnel should be familiar with the requirements of TB SIG 291 before attempting installation or operation of the equipment covered in this manual. Failure to follow the requirements of TB SIG 291 could result in injury or DEATH. WARNING The metal case handle of the antenna coupler in the extended carry or pullout position is close to the output terminal. A short circuit is possible through the case whenever the antenna lead-in wire is connected to the output terminal and the handle is not in the down position. High voltages and RF areas exist in the following locations: Series Capacitor A9 and Shunt Capacitor A7 (right side of antenna coupler) Series Varicoil A5 and Shunt Varicoil A6 (left rear corner of antenna coupler) Capacitor Assembly A10 (top front of antenna coupler) Loading-Phasing Discriminator A8$ (bottom of antenna coupler) TM 11-5985-326-35 C-2 CHANGEHEADQUARTERS DEPARTMENT OF THE ARMY No. 2WASHINGTON, DC 29 April 1983 DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL COUPLER ANTENNA CU-1658/A (NSN 5985-00-999-5927) AND CU-1669/GRC (NSN 5985-00-939-7495) TM 11-5985-326-35, 17 March 1972 is changed as follows: 1.Title of manual is changed as shown above. 2.New or changed material is indicated by a vertical bar in the margin of the page. 3.Added or revised illustrations are indicated by a vertical bar in front of the figure caption. 4.Remove and insert pages and figures as indicated below: RemoveInsert i, ii, iii.i, ii, iii 1-1 through 1-5.1-1 through 1-5 2-1 through 2-23.2-1 through 2-26 3-3.3-3 3-4 through 3-28.3-4 through 3-28.3 3-29.3-29 3-30 through 3-32.3-30 through 3-32.2 3-33.3-33 3-34.3-34 and 3-34.1 4-3 and 4-4.4-3 through 4-4.1 4-17 through 4-54.4-17 through 4-75 6-1 and 6-2 blank .6-1 and 6-2 blank A-1 and A-2 blank.A-1/(A-2 blank) None.Figure 6-2.1 None.Figure 6-4.1 Figure 6-8(1) Figure 6-8(2) None.Figure 6-8.1(1) None.Figure 6-8.1(2) None.Figure 6-8.1(3) None.Figure 6-8.1(4) Figure 6-9(1).Figure 6-9(1) Figure 6-9(2).Figure 6-9(2) Figure 6-10(1).Figure 6-10(1) Figure 6-10(2).Figure 6-10(2) 5.File this change sheet in front of the publication for reference purposes. TM 11-5985-326-35 By Order of the Secretary of the Army: E. C. MEYER General, United States Army Official:Chief of Staff ROBERT M. JOYCE Major General, United States Army The Adjutant General Distribution: To be distributed in accordance with DA Form 12-36 Direct and General Support Maintenance requirements for CU- 1658/A and CU- 1669/GRC. Changes In force: C 1 TM 11-5985-326-35 C-1 CHANGEHEADQUARTERS DEPARTMENT OF THE ARMY No.WASHINGTON, DC 4 June 1975 Direct Support, General Support and Depot Maintenance Manual COUPLER, ANTENNA CU-1658/A AND CU-1669/GRC TM 11-5985326-35, 17 March 1972, is changed as follows: 1.A vertical bar appears opposite changed material. 2.Remove and insert pages as indicated in the page list below: RemoveInsert 4-59 through 4-66.4-59 through 4-66 3.File this change sheet in the front of the manual for reference purposes. By Order of the Secretary of the Army: FRED C. WEYAND General, United States Army Official:Chief of Staff VERNE L. BOWERS Major General, United States Army The Adjutant General Distribution: To be distributed in accordance with DA Form 12-36, Direct and General Support maintenance requirements for CU- 1658/A and 1669/GRC. This manual contains copyrighted material owned by Collins Radio Company *TM 11-5985-326-35 TECHNICAL MANUAL HEADQUARTERS DEPARTMENT OF THE ARMY No. 11-5985-326-35 WASHINGTON, DC, 17 March 1972 DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL COUPLER ANTENNA CU-1658/A (NSN 5985-00-999-5927 AND CU-1669/GRC (NSN 5985-00-939-7495 REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this manual. If you find any mistakes or if you know of a way to improve the procedures, please let us know. Mail your letter, or DA Form 2028 (Recommended Changes to Publications and Blank Forms) direct to Commander, US Army Communications-Electronics Command and Fort Monmouth, ATTN: DRSEL-ME-MP, Fort Monmouth, NJ 07703. In either case, a reply will be furnished direct to you. Paragraph Page CHAPTER 1.INTRODUCTION . 1-1-1-5 1-1 CHAPTER 2.FUNCTIONING OF EQUIPMENT SECTION I.Block diagram analysis . 2-1,2-2 2-1 II.Circuit analysis. 2-3-2-26 2-4-2-26 CHAPTER 3.DIRECT SUPPORT MAINTENANCE SECTION I.General . 3-1, 3-2 3-1 II.Troubleshooting . 3-3-3-8 3-2-3-4 III.Removal and replacement. 3-9-3-20 3-5-3-8 IV.Testing . 3-21-3-25 3-29-3-34.1 CHAPTER 4.GENERAL SUPPORT AND DEPOT MAINTENANCE SECTION I.General . 4-1-4-3 4-1 II.Troubleshooting . 4-4-4-13 4-1-4-25 III.Adjustments . 4-14, 4-15 4-29 IV.Disassembly and reassembly . 4-16-4-27 4-23-4-73 V.Cleaning, inspection, and repair. 4-28-4-43 4-74 VI.Testing . 4-44-4-56 4-57 CHAPTER 5.DEPOT OVERHAUL STANDARDS. 5-1, 5-2 5-1 CHAPTER 6.FINAL (FOLD-OUT) ILLUSTRATIONS. 6-1 6-1 APPENDIX A.REFERENCES. .A-1 INDEX . .I-1 *This manual, together with TM 11-5985-326-20, 17 November 1970, supersedes TM 11-5821-271-15, 6 March 1967, including all changes. Change2 i TM 11-5985-326-35 LIST OF ILLUSTRATIONS Figure No.TitlePage 2-1Basic hf communications system, block diagram .2-3 2-2Antenna coupler, block diagram . 2-3 2-3Homing control circuits, simplified schematic diagram . 2-7 2-5Shunt capacitor A7 motor circuit, simplified schematic diagram . 2-8 2-6Series capacitor A9 motor circuit, simplified schematic diagram . 2-9 2-6.1Sense circuits and varicoil reference voltage, simplified schematic diagram . 2-11 2-7Frequency bank information, circuit diagram . 2-12 2-8Discriminator A8 phasing operation, simplified schematic diagram. 2-13 2-9Discriminator AS, loading operation, simplified schematic diagram . 2-14 2-10Discriminator AS, forward power operation, simplified schematic diagram . 2-15 2-11Discriminator A8, reflected power operation, simplified schematic diagram . 2-15 2-12Bank information sense circuit, simplified schematic diagram . 2-17 2-13RF Power and Key Circuits, Simplified Schematic Diagram . 2-19 2-14Phasing/Loading Sense Circuits, Simplified Schematic Diagram . 2-20 2-15Series Varicoil A5 Motor Circuit, Simplified Schematic Diagram . 2-24 2-16Tune B Circuit, Simplified Schematic Diagram . 2-25 3-1Couplers, Antenna CU-1658/A and CU- 1669/GRC, Parts Location . 3-13 3-2(1)Shunt Capacitor A7, Parts Location (Part 1 of 2).3-14 3-2(2)Shunt Capacitor A7, Parts Location (Part 2 of 2).3-16 3-2.1Shunt Capacitor A7, Parts Location (Part Number 777-4500-001). 3-18 3-3Step Coil A4 (Part Number 528-0524-000), Parts Location . 3-20 3-3.1(1)Step Coil A4 (Part Number 777-3508-001), Parts Location (Part 1 of 2). 3-21 3-3.1(2)Step Coil A4 (Part Number 777-3508-001), Part Location (Part 2 of 2) . 3-23 3-4Series A5 and Shunt A6 Varicoils, Parts Location . 3-25 3-5(1)Equipment Chassis Al, Parts Location (Part 1 of 2) . 3-26 3-5(2)Equipment Chassis Al, Parts Location (Part 2 of 2) . 3-28 3-6Series Capacitor A9, Parts Location . 3-28.2 3-7Capacitor Assembly A10, Parts Location. 3-28.3 3-8Coupler Control A2, Test Setup. 3-32 3-9Control Amplifier A3, Test Setup.3-36 3-10Discriminator AS, Test Setup. 3-37 3-11Operational Test Setup. 3-38 4-1Discriminator AS, Schematic Diagram. 4-23 4-1.1Step Coil A4 (Part Number 528-0524-000) Schematic Diagram . 4-24 4-1.2Step Coil A4 (Part Number 777-3508-001) Schematic Diagram . 4-25 4-2Series A5 and Shunt A6 Varicoils, Schematic Diagram. 4-26 4-2.1Shunt Capacitor A7 (Part Number 528-0466-000), Schematic Diagram . 4-27 4-2.2Shunt Capacitor A7 (Part Number 777-4500-001), Schematic Diagram . 4-27 4-2.3Series Capacitor A9, Schematic Diagram. 4-28 4-3Shunt Capacitor A7, Adjustment Setup . 4-29 4-4Coupler Control A2, Parts Location . 4-33 4-5Coupler Control A2, Front Terminal Board, Parts Location . 4-35 4-6Coupler Control A2, Rear Terminal Board, Parts Location .

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