ARCO.HTM FEB DECJan 5 2009 20102011 29 captures 29 Aug 00 - 5 Dec 10 Close Help F. W. Chesson FILE: ARCO.HTM 144 Fiske Street, New: 5-25-1994 Waterbury, CT. Rev: 5-21-2000 AIRCRAFT RADIO CORP. Type 12 ARC Radio Sets Aircraft Radio Corporation ARC radio sets have sometimes been confused with Joint Army-Navy ARC- (Aircraft, Radio, Communications) type equipments. The following may help in sorting out this historical airborne communications situation.... The Aircraft Radio Corporation, of Boonton, NJ arose in the 1930s as a supplier of goods and services to the early commercial airlines. Around 1940, it began to manufacture a series of receivers nearly identical with the SCR-274N Series made by Western Electric Co.. When the AN- Designations appeared c 1943, SCR-274N became AN/ARC-5, with BC- equipments given R-, T-, C-, MD-, and so on. Thus one may find both AN/ARC-12 and A.R.C. ARC 12 units. But they are not at all alike; ARC Type 12 is a set of receivers and transmitters covering .2-1.5 and 118-148 MC, while AN/ARC-12 has a 225-400 MC range. Type ARC 12 appeared c 1950, for 8 Army helicopters and 3 observation aircraft. Type ARC 12 Equipments ARC Designation Description Notes ---------------------------------------------------------------------------- A-12 Antenna U/W T-11,13, R-11,13 C-16 Control Unit, 28 VDC U/W R-11A C-15 Control Unit U/W T-11A (28 VDC) C-16 Control Unit U/W R-11A C-17 Control Unit U/W R-15 C-18 Loop Control U/W L-10 C-24 Control Unit, 14 VDC U/W L-10, R-10A,11A,15, T-11A C-25 Control Unit, 28 VDC U/W M-19, T-11A C-37 Control Unit, 28 VDC U/W M-13, R-11,13, T-11,13, 6151- D-10/A Dynamotor, 14/28 VDC in, 230 VDC out J-10 Jack Box U/W Headset 11935 & Mic 11937 J-12 Junction Box U/W C-24 J-13 Junction Box U/W C-37 L-10 DF Loop U/W C-24 M-11A (12511) Mounting Rack U/W T-11A M-12A (12512) Mounting Rack U/W R-11A M-13 (8631) Mounting Plate U/W C-37 M-18 (12705) Mounting Plate U/W C-16,17,18 M-19 (7093) Mounting Plate U/W C-25 R-10A Receiver, .52-1.5 MC 14 VDC R-11A Receiver, 190-550 KC 28 VDC R-15 Receiver, 108-135 MC 28 VDC R-19 Receiver, 118-148 MC 14/28 VDC T-11* Transmitter, 116-132 MC, 5-ch, 1.2 W, AM 28 VDC T-13 Transmitter, 132-148 MC, 5-ch, 1.2 W, AM 28 VDC 3423 Lead-in Wire U/W Antenna Kit 12296 5319 Receptacle Dust Cap 6051 Dial Plate, .2-.55 MC U/W R-11A 6151 Flex Shaft U/W C-24 & L-10, other ARC 12s 6357 Elbow Drive Coupling 7086 Plug S/T PL-55 7100 Plug S/T PL-68 9375 Receptacle Dust Cap 10307 Alignment Tool U/W R-15,R-19 10714 VHF Xtals, 121.5 to 126.18 MC 11318 RF Cable 11337 BNC Plug UG-88/U 11368 Adapter Plug UG-273/U 11369 RF Cable U/W A-12, R/T units 2 UG-88/U Plugs 11834 Power Cable U/W 12098 Plug 11835 Power Cable U/W 12098 Plug 11935 Headset U/W J-10 11936 Mic Bracket " " 11937 Microphone U/W J-10 11943 Jumper Plug U/W R-19 11938 Headset Bracket " " 11974 Cable U/W 12139 Plug 11934 Plug U/W R-11A 12096 Connector, 19-cond U/W C-36 12098 Plug, 8-cond U/W J-207; T-11A, C-37 12125 Plug, 6-cond U/W J-603; R-10,R-11AA 12139 Plug U/W C-137 12243 Antenna Insulator U/W Antenna Kit 12296 12296 Antrenna Wire Kit U/W L-19 Aircraft 12316 Leadin Insulator U/W Antenna Kit 12296 12324 Antenna Wire Thimble U/W Antenna Kit 12296 12372 Power Plug, 3-cond U/W J-1002/C-24 12375 Plug, 4-cond U/W J-205; T-11A (14 VDC) 12413 Antenna Spring U/W Antenna Kit 12296 13476 LF Dial U/W R-11A (28 VDC) 13976 Control Box Dial Drive 14034 11-piece Frequency Set U/W 14049 14048 Power Switch U/W R-11A, T-11A (28 VDC) 14049 VHF Channel Switch U/W T-11A (28 VDC) 14050 Plug, 8-cond U/W J-207; T-11A,T-13 (28 VDC) 14049 Channel Switch 14051 Plug, 6-cond U/W J-204; R-11A,R-19 (28 VDC) 14052 Plug, 4-cond U/W J-205; T-11A,T-13 (28 VDC) 14129 BNC T-Adapter UG-274/U U/W 11318 14320 Plug, 19-cond U/W J-1101; C-25 14321 Power Plug, 2-cond U/W J-101; R-11A,R-15 14491 Connector 14569 Receptacle Dust Cap 14588 Receptacle Dust Cap 14589 Receptacle Dust Cap 15392 Capacity Plate U/W T-13 (lowers F to 125 MC) 15900 Capacity Plate U/W T-13A (lowers F to 125 MC) Navy ATA/ARA Components Navy Type Aircraft Radio Co. Designation Name of Major Unit or Accessory Designation CBY-21531 Receiver Dynamotor 7351 CBY-21626 Transmitter Dynamotor 5168 CBY-23155 Receiver Control Box (2-RX) 6546 CBY-23243 Transmitter Control Box 7095 CBY-23251 Receiver Control Box (3-RX) 5014 CBY-29125 Antenna Relay 5017 CBY-29126 Antenna Relay Shock Mount 7056 CBY-46085 Receiver Shock Mount (2-RX) 5694 CBY-46104 Receiver, 1.5-3.0 Mc 5005 CBY-46105 Receiver, 3.0-6.0 Mc 5006 CBY-46106 Receiver, 6.0-9.1 Mc 5007 CBY-46110 Two-Receiver Rack 5018 CBY-46129 Receiver, 190-550 Kc 7839 CBY-46145 Receiver, 520-1500 Kc 7950 CBY-46149 Three-Receiver Rack 7537 CBY-46150 Three-Receiver Rack Shock Mount 7060 CBY-49107 Receiver Switch Panel Adapter (except 46145) 6433 CBY-50083 Modulator 5013 CBY-50084 Modulator Shock Mount 7058 CBY-52208 Transmitter, 3.0-4.0 Mc 5009 CBY-52209 Transmitter, 4.0-5.3 Mc 5010 CBY-52210 Transmitter, 5.3-7.0 Mc 5011 CBY-52211 Transmitter, 7.0-9.1 Mc 5012 CBY-52212 Transmitter Rack (2-TX) 5020 CBY-52213 Transmitter Shock Mount 7062 CBY-52232 Transmitter, 2.1-3.0 Mc 7916 CBY-62036 Auxiliary Outlet Adapter (use w/46145 only) 9074 ? Two-Receiver Control Box Mounting Plate 6831 ? Three Receiver Control Box Mounting Plate 7054 ? Transmitter Control Box Mounting Plate 7083 ? Receiver Test Set 7918 ? Transmitter Test Set 7919 ? Plugs: Receiver Rack, battery 6578 Receiver Rack, Modulator 6784 Receiver Rack, Receiver Control Box 6577 Modulator, Transmitter Control Box 6963 Transmitter Rack, Modulator 6964 Modulator, battery 6965 Transmitter Rack, Antenna Relay 6967 ? Tools: Tube Extractor 7489 Bristo Wrench #6 8021 Phillips Screw Driver #1A 8020 Knob Assembly, local tuning 6743 ? Splined Cable Components: Casing 3406 Shafting 1174 Nut 1167 Sleeve 6585 Spline 6788 Tag 6789 ? Dials for Receiver Control Box: 190-550 Kc 6051 520-1500 Kc 6052 1.5-3.0 Mc 7575 3.0-6.0 Mc 6053 6.0-9.1 Mc 6054 ? Miscellaneous: Rcvr Dynamotor Brushes (Low Voltage) 23609-3 Rcvr Dynamotor Brushes (High Voltage) 23609-4 Xmtr Dynamotor Brushes (Low Voltage) 23609-6 Xmtr Dynamotor Brushes (High Voltage) 23609-9 NOTE: Each brush part number is suffixed with either a "+" or "_". For example, on the LV end of the Rcvr Dynamotor, both a 23609-3 (+) and a 23609-3 (-) would be required. Each brush and brush holder is marked accordingly. ? Shock absorber unit: In 2-Rcvr or 2-Xmtr shock mount 5185 In 3-Rcvr shock mount 5195 In modulator shock mount 7067 In antenna relay shock mount 7065 Taken from: First Edition of Final Instruction Book for Model ATA and Model ARA Aircraft Radio Transmitting and Receiving Equipment. Aircraft Radio Corporation Boonton, New Jersey Contract Number NOs-74192 29 June, 1940. * * * RETURN TO INDEX