RAX-1_user_1945.pdf

RESTRICTED NAVAER 08-50-245 Handbook of Prelilllinary Instructions for NAVY MODEL RAX-l Aircraft Radio Equipment NOTlCE.-This document contains information affecting the national de fense of the United States within the meaning of the Espionage Act, 50 U. S. c., 31 and 32, as amended. Its transmission or the revelation of its contents in any manner to an unauthorized person is prohibited by law. Reprinted 15 March 1945 RESTRICTED Published by authority of The Chief of the Bureau of Aeronautics THIS PUBLICATION MAY BE USED BY PERSONNEL RENDERING SERVICE TO THE UNITED ST ATES OR ITS ALLIES Navy Regulations, Article 76, contains the follwing state ments relating to the handling of restricted matter: The Bureau of Aeronautics Aviation Circular Letter No. 31-44 contains the following paragraph relative to the use of technical aeronautics publications: Par. (9 ) (a). Restricted matter may be disclosed to persons of the Military or Naval Establishlnents in accord ance with special instructions issued by the originator or other competent authority, or in the bsence of special instructions, as determined by the local administrative head charged with custody of the subject matter. (b) Restricted matter may be disclosed to persons of discretion in the Government service when it appears to be in the public interest. (c) Restricted matter may be disclosed, under special circumstances, to persons not in the Government service when it appears to be in the public interest. Par. 8. Distribution to All Interested Personnel.-In connection with the distribution of aeronautical publica tions within any activity, it should be borne in mind by the officers responsible for such distribution that technical pub lications. are issued specifically for use not only by officer personnel, but more particularly by respoosible civilian and enlisted personnel working with or servicing equip ment to which the information applies. These instructions permit the issue of restricted publications to civilian contract and other accredited schools engaged in training personnel for Government work, to civilian concerns contracting for overhaul and repair of aircraft or aircraft accessories and to similar commercial organizations. r-.,.-LlST OF REVISED PAGES ISSUED-:.-.-:.o.-. NOTE.-A heavy black vertical line to the left of the text on revised pages indicates the ex tent of the revision. This line is omitted where more than 50 percent of the page is involved. ADDITIONAL COPIES OF THIS PUBLICATION MAY BE OBTAINED AS FOLLOWS: AAF ACTIVITIES.-Submit requisitions to the Commanding General, Fairfield Air Service Command, Patterson Field, Fairfield, OhIO, Attention: Publications Distribution Branch, in accordance with AAF Regulation No. 5-9. Also, for details of Technical Order distribution, see T. O. No. 00-25-3. NAVY ACTIVITIES.-Submit requests to Chief, BuAer, Navy Department, Washington, D. c., Attn.: Publications ection on order form NA V AER-140. For complete listing of available material and details of distribution see Naval Aeronautic Publications Index, NavAer 00-500. . A RESTRICTED 608344 u. S. GOVERNMENT PRINTING. OffiCE RESTRICTep. NAVAER 08-50-245 TABLE OF CONTENTS Page I. GENERAL DESCRIP-TION _ _ 1 A. Major Units _ 1 B. Vacuum Tubes _ 2 C. Diinensions and Weights _ 2 D. Power Drain_ 3 II. PETAIL DESCRIPTION_ 3 A. Mechanical Features -. -_ 3 B. Electrical Circuits _ 5 III. INSTAlLATION _ 13 A. Location -_ _ _ .-_ 13 B. Receiver Units _ 13 C. Junction Box _ _ 13 D. Cables _ , _ _ . 14 E. Connections _ - _ ,_ 14 F. Adjustment of Antenna Trimmers_ 14 IV. . OPERATION AND ADJUSTMENTS-_ 14 A. Operation _ 15 B. Adjustments _ 16 V. MAINTENANCE _ 17 VI. LOCATION AND CORRECTION TROUBLES _ 18 List of Major Units _ 26 Table VI-Parts List by Symbol Designations _ 27 Operating Spare Parts List_ 73 RESTRICTED RESTRictED NAVAER 08-5Q-245 LIST OF CURVES Page RECEIVER UNIT NO. 1 K-7883551 - AVC Curve_ 83 K-7883552 - MCW Overload Curve_ 84 K-7883553 - CW Overload Curve_ 85 K-7883554 - I-f Selectivity Curve_ 86 K-7883555 - Over-all Selectivity Curve, Band No. L_ 87 K-7883556 - Over-all Selectivity Curve, Band No. 2_ 88 K-7883557 - Over-all Selectivity Curve, Band No.3 and 4_ 89 K-7883558 - Sensitivity Curve -_ 90 K-7883559 - I-f and Image Rejection_ 91 RECEIVER UNIT NO. 2 K-7883560 - AVC Curve_ 92 K-7883561 - MCW Overload Curve_ 93 K-7883562 - CW Overload C.urve-94 K-7883563 - I-f Selectivity. Curve_ 95 K-7883564 - Over-all Selectivity Curve, Band No. L. _ . _ ._. _ ._. _ . _ . _ 96 K-7883565 - Over-all Selectivity Curve, Band No. 2 _ . _ . _ ._ 97 K-7883566 - Over-all Seleqivity Curve, Band No.3 and 4 _ . _ . _ . _ . 98 K-7883567 - Sensitivity Curve -_ . _ . _ . _ . _. 99 K-7883568 - I-f and Image Rejection _ ._ . _ . _ . _. _ . 100 RECEIVER UNIT NO. 3 K-7883569 -A VC Curve _ ._ . _ . _ . _ . _ . _ . _ ._. 101 K-7883570 - MCW Overload Curve _ . _ . _ . _ . _ 102 K-7883571 - CW Overload Curve . _ . _. _ . _ . _ . _ . _ 103 K-7883572 - I-f Selectivity Curve _ ._._ . _ . _ . _ . _ 104 ,K-7883573 - Over-all Selectivity Curve, Band No. L. _ . _ . _ . _ . _ . _ . _ 105 K-7883574 - Over-all Selectivity Curve, Band No. 2 . _ . _ . _ . _ . _ . _ ._ 106 K-7883575 - Over-all Selectivity Curve, Band No.3 and 4. _ . _ ._ . _._._. _ . -. 107 K-7883576 - Sensitivity Curve _ ._ . _ . _ . _. _ ._ . _ . _ 108 K-7883577 - I-f and Image Rejection._ . _ 109 LIST OF DRAWINGS W-7350950 - Outline Drawing of Single Receiver, Model RAX-1 R a d i 0 Receiving Equip- Page ment _ . _ ._ 111-112 W-7350826 - Schematic Diagram, Type CG- 46115 Reeiver Unit No. 1 113-114 WW-7350184 - Schematic Diagram, Type CG- 46116 Receiver Unit No. 2 115-116 WW-7350185 - Schematic Diagram, Type CG- 46117 Receiver Unit No. 3 117-118 M-7465168 - Cable Connections _ . _ 119-120 W -7350828 - Connection Diagram, Type CG-46115 Receiver Unit No. L. _ . _ . _ . _ 121-122 W-7350840 - Connection DiagranJ, -f UniJs Type CG-46115 Ra- dio Receiver No. L _ 123-124 W -7350830 - Connection Diagram, Type CG-46116 Receiver Unit No. 2_._ 125-126 W-7350829 - Connection Diagram, R-f Units, Type CG-46116 Ra- dio Receiver No. 2_ 127-128 , WW-7350186 - Connection Diagram, Type CG-46117 Receiver. Unit No. 3 _ . _ . _ . _ ._ 129-130 W-7350847 - Connection Diagram, R-f U nits, Type CG-46117 Ra- dio Receiver No. 3-.- 131-132 P-7763365 - Schematic Diagram of Single Receiver Mounting and External Connections _._ 133-134 M-7465399 - Connection Diagram, Type CG-46128 Receiver Rack._ 135 M-7465393 - Outline Drawing, Type CG- 68028 Junction Box _ ._ 136 M-7465404 - Connection Diagram, Type CG-68028 Junction Box _ 137 K-7883550 - Base Connections of Tube Types used in Navy Model RAX-l Radio Receiving Equipment _ . _ . _ . _ 138 P-7764087 - Cabling Diagram, Model RAX-l Radio Receiving Equipment _ . ,. _ 139-140 ii RESTRICTED RESTRICTED NAVAER 08-5Q-245 GUARANTEE The equip1Dent; ,including all parts and spare parts, except vacuum tubes, is guaraqteed for a service period of ONE YEAR with the understanding that, as a condi tion of this contract, all items found to be defective as to design, material, workmanship, or manufacture will be replaced without delay and at no expense to the Government; provided that such guarantee and agree ment will not obligate the contractor to make replace ment of defective material unless the failure, exclusive of normal expected shelf life deterioration, occurs within a period of TWO YEARS from the date of delivery of the equipment to and acceptance by the Government, and provided further, that if any part or parts (except vacuum tubes) fail or are found defective to the extent of ten per cent (100/0) or more of the total number of similar units furnished under the contract (exclusive of spares), such part or parts, whether supplied in the equipment or as spares, will be conclusively presumed to be of defective design, and as a condition of contract subject to one hundred per cent (1000/0) replacement by suitable redesigned units. Failure due to poor workmanship while not necessarily indicating poor design, will be considered in the same category as failure due to poor design. Re-designed replacements which will assure proper operation of the equipment will be supplied promptly, transportation paid, to the Naval activity using such equipment, upon receipt of proper notice and without cost t the Govern ment. All such defective parts will be subject to ultimate return to the contractor. In view of the fact that normal activities of the Naval Service may result in the use of equipment in such remote portions of the world or under such conditions as to preclude the return of the defective items or unit prior to replacement without jeopardizing the integrity of Naval communications, the exigencies of the Service therefore may necessitate expeditious repair of such item or unit in order to prevent extended inter ruption of communications. In such cases the return of a defective item or unit for examination by the con tractor prior to replacement will not be required. The report of a responsible authority including details of the conditions surrounding the failure will be acceptable for effective adjustment under the provisions f this con tractual guarantee. The above period of TWO YEARS and the service . period of ONE YEAR will not include any portion of the time that the equipment fails to give satisfactory performance due to defective items and the necessity for replacement thereof. All replacement parts will be guaranteed to give ONE YEAR of satisfactory service. The design of this equipment is such that the vacuum tubes will operate within their published ratings at all times and in such a manner that a tube life of 2000 hours of service may be expected. Vacuum tubes of the normal 50-watt envelope size and larger are guaranteed for 1000 hours of service life, in accordance with the provisions of Section V of Specifications RE-13A-600B. All smaller tubes, i. e. , tubes not subject to the above mentioned 1000-hour service life guarantee, are covered by a manufacturers warranty regarding freedom from defects of design, material, and workmanship. Batteries, rubber and material normally consumed during operation are warranted good and free from defects. SAFETY PRECAUTIONS Operation of this equipment involves the use of high voltages which are dangerous to life. Operating personnel must at all time observe all safety regulations. Do not change tubes or make adjustments inside equipment with high voltage supply on. Do not depend upon door switches or interlocks for protection but al ways shut down motor-generators or other power equipment. U nrler certain conditions dangerous potentials may exist in circuits with power controls in the off position. due to charges retained by capacitors, etc. To avoid casualties always discharge and ground circuits prior to touching them. The attention of officers and operating per sonel is directed to Bureau of Ships circular letter No. 5a of 3 October 1934, or subsequent revisions thereof on the subject of Radio Safety Precautions to Be Observed. I. GENERAL DESCRIPTION The Model RAX-1 Aircraft Radio Receiving Equip ment is designed for reception of radio signals in the frequency range from 200 to 27,000 kilocycles and is intended primarily for installation in aircraft. The equipment operates from a 24-volt storage battery, nor mally floating across an engine-driven battery-charging generator, the output of which varies from 22 to 29 volts. A. MAJOR UNITS 1. (a) Radio Receiver Unit No.1, Navy Type CG- 46115, Frequency Range: 200 to 1500 kc (4 band) com plete with one set of vacuum tubes. (b) Radio Receiver Unit No.2, Navy Type CG- 46116, Frequency Range: 1500 to 9000 kc (4 bands) complete with one set of vacuum tubes. RESTRICTED 1 RESTRICTED NAVAER 08-5Q-245 (c) Radio Receiver Unit No. 3, Navy Type CG- 46117, FreqUency Range: 7000 to 27,000 kc (5 bands) complete with one set of vacuum tubes. ( d) Three Radio Receiver Dynamotors, one for each Radio Receiver Unit and mounted integrally there with. The dynamotors are identical and completely interchangeable. Rating: 28.0 Volts Primary-166.0 Volts Secondary-.090 A -320 to +650 C Ambient Cont., Ball Bearing, Totally Enclosed. 2. Three Receiver Racks, Navy Type CG-46128, G-E Drawing P-7763086Gl Each of these racks provide shock mounting for one of the three radio receivers. Each rack has A and B jacks, a mixing switch, a receptacle for external audio and power cable, and a ground post. 3. One Junction Box, Navy Type CG-68028, G-E Drawing P-7763087. This unit has two A jacks, two B jacks for interconnecting with the ICS and Sidetone .circuits, three receptacles for audio and power to each radio receiver, and a power input receptacle for incoming power. 4. Cables and Plugs-G-E Drawing M-7465168P2 and P3. Seven plugs are provided for terminating the three radio receivers to junction box cables, and for the junc tion box end of the power cable. A ferrule and nut connects the power cable to the airplane supply. The cable is four-conductor shielded therinoil-cov ered and is supplied in bulk. 5. Slip Covers Each radio receiver unit