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SWAN Tube Transceiver Compendium (An Edited Collection Of Technical Data) Rev 4.0, October 24, 2005 Robert Balonis, NB3W 240 (1962) 117AC 400 420 VFO (1964) 350 (1964) 500CX 508 VFO (1970) 117XC 700CX (1973) 350D (1977) Revision History • Rev 0.0 - 7/22/01 • Rev 1.0 - 8/6/01 • Rev 1.1 - 8/21/01 • Rev 2.0 - 6/1/02 • Rev 3.0 - 3/10/04 Copyright © 2001-05 by Robert Balonis - NB3W This document may only be reproduced and distributed free, other than reimbursement for any costs directly associated with reproduction or transmission. No part of this document may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording or by any information storage and retrieval system for a profit. ii TABLE OF CONTENTS FIGURES........................................................................................vii 3.3.3. 14C, 14X/P DC Converters.................................... 57 TABLES ..........................................................................................ix 3.3.4. 14-117 DC ............................................................. 58 PREFACE........................................................................................xi 3.3.5. 117AC.................................................................... 58 ACKNOWLEGEMENTS................................................................xiii 3.3.6. 117B ...................................................................... 59 1. INTRODUCTION ..........................................................................1 3.3.7. 117C ...................................................................... 59 1.1. Company History..............................................................1 3.3.8. 117X/117XB/117XC............................................... 60 1.2. Early Production Facilities ................................................2 3.3.9. 230X/230XC .......................................................... 61 1.3. Product Line Overview .....................................................5 3.3.10. 400-PS............................................................... 62 1.4. Atlas................................................................................10 3.3.11. 412/512.............................................................. 62 1.5. Siltronix...........................................................................10 3.3.12. PSU-3, PSU-3A ................................................. 62 2. GENERAL TRANCEIVER INFORMATION ...............................11 3.3.13. PSU-2, PSU-5/C, PSU-6 ................................... 62 2.1. Swan Nets and Resources.............................................11 3.4. Repairs and Troubleshooting......................................... 62 2.1.1. On-Air .....................................................................11 3.4.1. Common Problems/Issues..................................... 62 2.1.2. Internet Resources .................................................11 3.4.1.1. Fuse Size........................................................... 62 2.2. General Characteristics..................................................12 3.4.1.2. Cinch-Jones Connector Problems..................... 63 2.2.1. Serial No./Schematic/Production Info.....................13 3.4.1.3. Overheating, 117XC .......................................... 63 2.2.2. VFO Drift Issues, Specifications.............................14 3.4.1.4. Capacitor Replacement ..................................... 63 2.2.3. IF Filter Design Information ....................................15 3.4.1.5. Relay Supply Short............................................ 64 2.2.4. Transceiver Intermediate Frequencies...................17 3.4.2. Troubleshooting (117X) ......................................... 65 2.2.5. First Rig Suggestions .............................................18 3.4.2.1. Problem Isolation............................................... 65 2.3. Selected Transceiver Comments ...................................18 3.4.2.2. Component Testing ........................................... 65 2.3.1. 115, 120, 140, 175 (Early Mono-Band) ..................19 3.4.2.3. Transformer Failure ........................................... 66 2.3.2. 160, 160-X (Mono-Band)........................................21 3.4.3. Rectifier Diodes ..................................................... 67 2.3.3. 240 (Tri-Band) ........................................................21 3.4.3.1. Diode Ratings .................................................... 67 2.3.4. 250/C (Mono-Band)................................................25 3.4.3.2. Diode Failure and Replacement ........................ 67 2.3.5. 260 Cygnet .............................................................26 3.4.4. Rectifier/Filter Board Refurbishment...................... 67 2.3.6. 270, 270B Cygnets.................................................27 3.4.5. Failure Case Studies ............................................. 67 2.3.7. 300B Cygnet...........................................................28 3.5. Power Supply Alternatives............................................. 69 2.3.8. 300, 310, 320 Commercial (Channelized)..............28 3.5.1. Heathkit HP20, 23.................................................. 69 2.3.9. 350, 350A, 350B, 350C, 350D ...............................28 3.5.2. Galaxy AC35.......................................................... 69 2.3.10. 400 (Amateur) ....................................................32 3.6. HV Reduction Modification............................................. 70 2.3.11. 400E/F/G/H (Commercial/Military) .....................34 3.6.1. Plate/Screen Voltage PA Issue.............................. 71 2.3.12. 500, 500C, 500CX..............................................35 3.6.2. Impact on Circuit.................................................... 71 2.3.13. 600R/RC/T Twins ...............................................38 3.6.3. Procedure .............................................................. 71 2.3.14. 700CX, HS700S, 750CW ...................................39 3.6.4. Measure Voltages (Mod for Lower HV) ................. 72 2.3.15. 1011 (Mono-Band) .............................................41 3.7. Measured Power Supply Voltages................................. 72 2.3.16. 1046 CB Transceiver..........................................41 3.7.1. 117XC Voltages (Unmodified) ............................... 72 2.4. Operating Issues (SSB, AM, CW, PSK31) .....................41 3.7.2. Inter-Model Voltage Comparison. .......................... 72 2.4.1. Tune-Up Essentials ................................................42 3.7.3. Voltage Levels as Function of Load....................... 74 2.4.2. SSB ........................................................................45 3.7.4. HV Load Versus DC Input Power .......................... 74 2.4.2.1. Audio Quality ......................................................45 4. ACCESSORIES......................................................................... 79 2.4.2.2. Modulation Level Adjustment (1/3rd Rule) ..........45 4.1. Amplifiers, Linear ........................................................... 79 2.4.3. AM ..........................................................................46 4.1.1. Mark I..................................................................... 79 2.4.3.1. Balanced Modulation Signal Generation............46 4.1.2. Mark II.................................................................... 80 2.4.3.2. Carrier Level Adjustment....................................46 4.1.3. 1200X (Cygnet)...................................................... 80 2.4.3.3. Separate Receiver..............................................46 4.1.4. 1500ZA .................................................................. 81 2.4.4. CW .........................................................................47 4.1.5. Mark 6/B ................................................................ 81 2.4.5. PSK-31 ...................................................................48 4.1.6. VHF-150 ................................................................ 81 2.4.6. MARS .....................................................................48 4.2. Antenna Tuners ............................................................. 81 2.5. Published Articles and Reviews .....................................48 4.3. Cooling Fans.................................................................. 82 2.5.1. QST ........................................................................48 4.4. Filters, Audio/Noise Blanker........................................... 84 2.5.2. Ham Radio .............................................................49 4.4.1. AF-800 and CW Built-In Filters .............................. 84 2.5.3. CQ ..........................................................................49 4.4.2. Audio Notcher-Peaker – I.C. Audio Filter............... 84 3. POWER