{"language": "en", "segments": [{"text": " Second salvo, 200 yards short.", "start": 7.68, "stop": 11.1, "id": 0}, {"text": " Third salvo, on target.", "start": 14.4, "stop": 18.78, "id": 1}, {"text": " [...]", "start": 30.0, "stop": 59.98, "id": 2}, {"text": " [...]", "start": 72.6, "stop": 73.96, "id": 3}, {"text": " Long before Pearl Harbor, the Signal Corps of the United States Army knew it", "start": 73.96, "stop": 80.58, "id": 4}, {"text": " would take more than a telephone wire to connect this voice with all the other", "start": 80.58, "stop": 85.2, "id": 5}, {"text": " fighting units that had to hear it.", "start": 85.2, "stop": 87.04, "id": 6}, {"text": " They knew it would take radio transmission.", "start": 87.12, "stop": 90.06, "id": 7}, {"text": " Radio can reach these tanks wherever they are and tell them what's ahead.", "start": 91.3, "stop": 95.54, "id": 8}, {"text": " A radio transmitter could coordinate the movement of troops, bring tanks and", "start": 96.88, "stop": 102.12, "id": 9}, {"text": " infantry together at the right place at the right time.", "start": 102.12, "stop": 105.9, "id": 10}, {"text": " But it would have to be a mobile radio transmitter.", "start": 107.62, "stop": 110.64, "id": 11}, {"text": " And it would have to be a powerful transmitter to keep an unbroken contact", "start": 111.72, "stop": 116.38, "id": 12}, {"text": " between our forces on the ground, in the air and on the sea.", "start": 116.38, "stop": 120.92, "id": 13}, {"text": " The control of widely separated forces, the timing of their action, the", "start": 122.0, "stop": 128.68, "id": 14}, {"text": " success of the attack, depends upon reliable radio communication.", "start": 128.68, "stop": 133.56, "id": 15}, {"text": " Yes, the Signal Corps engineers knew just what kind of a transmitter", "start": 134.5, "stop": 138.14, "id": 16}, {"text": " it would take to do the job.", "start": 138.14, "stop": 139.72, "id": 17}, {"text": " But the big problem was to locate a manufactured transmitter of a design that", "start": 139.82, "stop": 145.72, "id": 18}, {"text": " would come close to these requirements.", "start": 145.72, "stop": 147.64, "id": 19}, {"text": " In this pre-war Halicrafter's HT-4 transmitter, the Signal Corps", "start": 149.64, "stop": 154.88, "id": 20}, {"text": " found many of the answers.", "start": 154.88, "stop": 156.54, "id": 21}, {"text": " It was designed especially for amateur use.", "start": 157.44, "stop": 160.14, "id": 22}, {"text": " It was easily capable of worldwide communication using either code or voice.", "start": 160.8, "stop": 166.32, "id": 23}, {"text": " Another great advantage was the fact that this Halicrafter's unit had been on", "start": 167.12, "stop": 171.76, "id": 24}, {"text": " the market for several years.", "start": 171.76, "stop": 173.4, "id": 25}, {"text": " There was an opportunity to check its performance through the records", "start": 174.14, "stop": 177.7, "id": 26}, {"text": " of hundreds of America's hands.", "start": 177.7, "stop": 179.38, "id": 27}, {"text": " And these amateurs know good performance.", "start": 180.24, "stop": 183.22, "id": 28}, {"text": " It employed band switching in the exciter and driver stages, which made it", "start": 184.36, "stop": 189.12, "id": 29}, {"text": " possible to change frequencies very rapidly.", "start": 189.12, "stop": 191.68, "id": 30}, {"text": " ...W2USA... ...I'm sorry, I'm going to... ...I'm moving now", "start": 195.98, "stop": 202.0, "id": 31}, {"text": " W2USA... ...the center of the... ...I'm going to... ...I'm going", "start": 202.0, "stop": 208.82, "id": 32}, {"text": " to... ...because I'm out in the control of making a station break.", "start": 208.82, "stop": 211.36, "id": 33}, {"text": " I wonder if you're still in here in the station. ...I'm going to be in the", "start": 212.4, "stop": 214.74, "id": 34}, {"text": " control room. ...I'm going to be in the control room. ...I'm going to be", "start": 214.74, "stop": 219.78, "id": 35}, {"text": " in the control room.", "start": 219.78, "stop": 221.5, "id": 36}, {"text": " Hello, CQ. Hello, CQ.", "start": 223.02, "stop": 226.18, "id": 37}, {"text": " This is W9WZE Chicago, W9WZE Chicago, calling CQ for any", "start": 226.9, "stop": 233.78, "id": 38}, {"text": " 20-meter phone and standing by.", "start": 233.78, "stop": 235.42, "id": 39}, {"text": " Go ahead, please.", "start": 236.46, "stop": 237.36, "id": 40}, {"text": " Hello, W9WZE Chicago.", "start": 241.18, "stop": 246.28, "id": 41}, {"text": " Hello, W9WZE Chicago.", "start": 247.06, "stop": 249.62, "id": 42}, {"text": " This is W6QD Los Angeles, California.", "start": 249.96, "stop": 254.38, "id": 43}, {"text": " W6QD Los Angeles, LMW9WZE Chicago.", "start": 254.38, "stop": 259.42, "id": 44}, {"text": " Go ahead, Bill.", "start": 259.5, "stop": 260.48, "id": 45}, {"text": " Hello, W6QD Los Angeles, California.", "start": 263.3, "stop": 266.1, "id": 46}, {"text": " This is W9WZE Chicago coming back.", "start": 266.8, "stop": 269.46, "id": 47}, {"text": " Good evening, Herb.", "start": 270.42, "stop": 270.94, "id": 48}, {"text": " Your signals are coming in fine tonight.", "start": 271.62, "stop": 273.14, "id": 49}, {"text": " R5S9.", "start": 273.82, "stop": 274.96, "id": 50}, {"text": " By the way, Herb, what are you doing on 20-meter phone?", "start": 276.18, "stop": 278.52, "id": 51}, {"text": " I thought you always worked CW.", "start": 278.62, "stop": 280.42, "id": 52}, {"text": " Now let's hear something about that marvelous California weather, eh?", "start": 281.4, "stop": 284.76, "id": 53}, {"text": " Alaska, Australia, Europe, South Africa.", "start": 287.34, "stop": 290.46, "id": 54}, {"text": " These were regular, almost daily experiences in many amateurs' homes, where", "start": 291.3, "stop": 296.5, "id": 55}, {"text": " halocrafters were rapidly shrinking this old world of ours.", "start": 296.5, "stop": 299.78, "id": 56}, {"text": " The transmitter that serves the Army must be able to perform anywhere and under", "start": 301.08, "stop": 306.6, "id": 57}, {"text": " all kinds of unpredictable conditions.", "start": 306.6, "stop": 309.12, "id": 58}, {"text": " Up to this time, no one had ever thought seriously of putting this sensitive,", "start": 310.82, "stop": 315.04, "id": 59}, {"text": " finely balanced instrument on wheels and bouncing it around foxholes.", "start": 315.24, "stop": 319.46, "id": 60}, {"text": " What about vibration?", "start": 320.48, "stop": 321.56, "id": 61}, {"text": " Where would the power come from?", "start": 322.36, "stop": 324.0, "id": 62}, {"text": " The job of toughening up the HT-4 to go to war fell on the shoulders of Bill", "start": 325.7, "stop": 331.44, "id": 63}, {"text": " Halligan, Bob Samuelson, Halocrafters' chief engineer, and the hard-pressed", "start": 331.44, "stop": 336.5, "id": 64}, {"text": " technicians of the Signal Corps.", "start": 336.5, "stop": 338.1, "id": 65}, {"text": " There were few changes needed to adapt this unit to Army needs.", "start": 340.36, "stop": 343.7, "id": 66}, {"text": " There was good engineering and good sound construction in the set to start with.", "start": 344.36, "stop": 348.9, "id": 67}, {"text": " This was to be the new home for Halocrafters' equipment.", "start": 350.46, "stop": 354.04, "id": 68}, {"text": " Everything needed to transmit and receive had to be packed into this small space.", "start": 354.98, "stop": 359.8, "id": 69}, {"text": " That would take some more good engineering.", "start": 359.9, "stop": 363.02, "id": 70}, {"text": " This demand was nothing new to these pioneers.", "start": 365.96, "stop": 370.08, "id": 71}, {"text": " There are no fixed limits in Halocrafters' design or construction.", "start": 370.96, "stop": 375.42, "id": 72}, {"text": " There is always development, change, improvement.", "start": 376.24, "stop": 379.46, "id": 73}, {"text": " Many of the war adaptations were drawn from advanced developments that had been", "start": 381.36, "stop": 386.66, "id": 74}, {"text": " in the experimental stage for months.", "start": 386.66, "stop": 388.7, "id": 75}, {"text": " For example, in the pre-war model, plugging in a tuning unit might be quite a", "start": 390.66, "stop": 396.4, "id": 76}, {"text": " trick if the holes in the prongs couldn't get together.", "start": 396.4, "stop": 399.26, "id": 77}, {"text": " For the new Signal Corps transmitter, guide channels", "start": 403.2, "stop": 410.02, "id": 78}, {"text": " made this tuning unit change quick, positive, and held", "start": 410.02, "stop": 413.98, "id": 79}, {"text": " the unit securely in place.", "start": 413.98, "stop": 415.62, "id": 80}, {"text": " In the pre-war model, the prongs on the tube were enough to hold it in place, but", "start": 417.02, "stop": 423.5, "id": 81}, {"text": " this won't do for hopping shell holes.", "start": 423.5, "stop": 425.9, "id": 82}, {"text": " A tube support or ring was added to lock the tube firmly in position so that no", "start": 427.62, "stop": 434.18, "id": 83}, {"text": " amount of bumping or vibration would move it.", "start": 434.18, "stop": 437.02, "id": 84}, {"text": " For stationary use, no special footing was needed to anchor the transmitter, but", "start": 439.04, "stop": 445.1, "id": 85}, {"text": " for rough riding in a truck, rubber shock-proof mountings were added.", "start": 445.1, "stop": 449.56, "id": 86}, {"text": " In the process of making the entire unit more rugged, this air patter was", "start": 451.08, "stop": 456.46, "id": 87}, {"text": " replaced by a new vacuum tube padding condenser.", "start": 456.46, "stop": 459.76, "id": 88}, {"text": " Rooftop antennas could be as large as the pre-war ham wanted to make them, but it", "start": 462.16, "stop": 467.48, "id": 89}, {"text": " was pretty obvious that a rigging such as this one would hardly do on", "start": 467.48, "stop": 471.8, "id": 90}, {"text": " the top of a Signal Corps truck.", "start": 471.8, "stop": 473.42, "id": 91}, {"text": " The solution was in the use of whip antennas and in designing an antenna tuning", "start": 474.66, "stop": 479.54, "id": 92}, {"text": " unit, which would efficiently transfer the output of the", "start": 479.54, "stop": 482.94, "id": 93}, {"text": " transmitter to the whip antenna.", "start": 482.94, "stop": 484.84, "id": 94}, {"text": " Throughout all of these changes, to adapt a peacetime transmitter to wartime", "start": 495.16, "stop": 500.5, "id": 95}, {"text": " requirements, the high quality standards of Halicrafters were strictly maintained", "start": 500.5, "stop": 505.76, "id": 96}, {"text": " in workmanship, in design and construction, and especially in performance.", "start": 505.76, "stop": 511.86, "id": 97}, {"text": " When the Signal Corps inspected the first of Halicrafters transmitters armored", "start": 514.12, "stop": 518.72, "id": 98}, {"text": " for war, they found what they were looking for, a high-powered unit that had been", "start": 518.72, "stop": 524.42, "id": 99}, {"text": " made completely mobile, one that delivered good, reliable performance", "start": 524.42, "stop": 529.3, "id": 100}, {"text": " under all conditions.", "start": 529.3, "stop": 531.04, "id": 101}, {"text": " The first big job had been done well.", "start": 532.16, "stop": 535.0, "id": 102}, {"text": " Then came the warning of another bigger job.", "start": 536.36, "stop": 539.1, "id": 103}, {"text": " Field reports indicate performance of SCR-299 exceeds expectation.", "start": 539.48, "stop": 546.48, "id": 104}, {"text": " Request you expedite production as much as possible.", "start": 547.86, "stop": 551.06, "id": 105}, {"text": " And in working man's English, that means let's go on production.", "start": 552.64, "stop": 556.94, "id": 106}, {"text": " This is the plant in Clearing, Illinois, where mass production of the new SCR-299", "start": 559.06, "stop": 565.98, "id": 107}, {"text": " mobile radio station was obtained on a scale never dreamed", "start": 565.98, "stop": 570.2, "id": 108}, {"text": " of before in this industry.", "start": 570.2, "stop": 571.78, "id": 109}, {"text": " The key men for this tremendous production job were selected from the ranks of", "start": 573.16, "stop": 577.92, "id": 110}, {"text": " the American radio amateurs.", "start": 577.92, "stop": 579.58, "id": 111}, {"text": " These men had the know-how, the technical background and experience it took", "start": 581.28, "stop": 586.12, "id": 112}, {"text": " to get into action fast.", "start": 586.12, "stop": 587.92, "id": 113}, {"text": " This entire operation is headed by Herb Hartley, known to the amateur fraternity", "start": 588.46, "stop": 593.88, "id": 114}, {"text": " as W9WNG.", "start": 593.88, "stop": 596.16, "id": 115}, {"text": " This production was accomplished through the splendid cooperation of hundreds of", "start": 597.84, "stop": 601.86, "id": 116}, {"text": " loyal, skilled workers who realized how big the job ahead was", "start": 601.86, "stop": 606.44, "id": 117}, {"text": " and knew how to do it.", "start": 606.44, "stop": 608.44, "id": 118}, {"text": " It was achieved through the unfailing efforts of many suppliers and their", "start": 610.84, "stop": 614.92, "id": 119}, {"text": " thousands of workers who built the tubes, the transformers, the condensers,", "start": 614.92, "stop": 619.76, "id": 120}, {"text": " coils, insulators, the steel chassis, and all the other components that go in to", "start": 620.06, "stop": 625.64, "id": 121}, {"text": " make the SCR-299.", "start": 625.64, "stop": 627.32, "id": 122}, {"text": " And finally, the very design and construction of the transmitter led itself to", "start": 629.82, "stop": 635.1, "id": 123}, {"text": " mass production better than any other pre-war domestic transmitter.", "start": 635.1, "stop": 639.18, "id": 124}, {"text": " The chassis was strong.", "start": 640.26, "stop": 642.48, "id": 125}, {"text": " There was room to work with subassemblies.", "start": 643.0, "stop": 645.28, "id": 126}, {"text": " This is the main assembly line, from the end of which come", "start": 647.2, "stop": 651.34, "id": 127}, {"text": " the completed transmitters.", "start": 651.34, "stop": 652.9, "id": 128}, {"text": " This is the feeder table for the main assembly line.", "start": 654.72, "stop": 657.66, "id": 129}, {"text": " Here, the subassemblies are inspected or hooked up to other components.", "start": 658.52, "stop": 662.38, "id": 130}, {"text": " At the foot of the main assembly line, the transmitter looks like this, a steel", "start": 663.68, "stop": 668.9, "id": 131}, {"text": " base to which are added sockets for rectifier tubes.", "start": 668.9, "stop": 672.22, "id": 132}, {"text": " Then the bleeder resistor, which furnishes a constant", "start": 672.74, "stop": 676.1, "id": 133}, {"text": " load on the high voltage supply.", "start": 676.1, "stop": 677.9, "id": 134}, {"text": " Next, the filter choke and condensers, which supply direct current to", "start": 678.88, "stop": 683.26, "id": 135}, {"text": " the plate circuits of the transmitter.", "start": 683.26, "stop": 684.8, "id": 136}, {"text": " In wiring these parts, a great deal of time and work is saved by the use", "start": 686.0, "stop": 691.1, "id": 137}, {"text": " of preformed cables.", "start": 691.1, "stop": 692.66, "id": 138}, {"text": " The cables are cut, formed, and tipped, all ready for installation.", "start": 693.86, "stop": 699.62, "id": 139}, {"text": " And here's the base assembly, completed in just a little more time", "start": 700.5, "stop": 704.9, "id": 140}, {"text": " than it's taken to show it.", "start": 704.9, "stop": 706.86, "id": 141}, {"text": " Meanwhile, on the opposite side of the table, the power", "start": 709.92, "stop": 712.96, "id": 142}, {"text": " control panel is being assembled.", "start": 712.96, "stop": 714.78, "id": 143}, {"text": " These are the controls for filament voltage and modulator bias.", "start": 715.58, "stop": 719.06, "id": 144}, {"text": " The purpose of this panel is to group, within convenient reach of the operator,", "start": 720.06, "stop": 724.1, "id": 145}, {"text": " all the essential power controls.", "start": 724.58, "stop": 726.64, "id": 146}, {"text": " These cables here are cut to length and form over on the feeder table.", "start": 727.22, "stop": 732.52, "id": 147}, {"text": " Terminal lugs are soldered to the ends.", "start": 733.84, "stop": 735.6, "id": 148}, {"text": " Then all the other wires needed in the circuit are placed into position, bound", "start": 736.52, "stop": 741.2, "id": 149}, {"text": " together, so that soldering to terminals is the only", "start": 741.2, "stop": 744.66, "id": 150}, {"text": " operation needed in the final assembly.", "start": 744.66, "stop": 746.74, "id": 151}, {"text": " This is the power panel cable.", "start": 748.0, "stop": 749.72, "id": 152}, {"text": " When wiring is completed and the switches and fuses have been installed, the", "start": 751.46, "stop": 756.2, "id": 153}, {"text": " sides are joined to the power control panel, and this unit is ready to", "start": 756.2, "stop": 760.5, "id": 154}, {"text": " join the main assembly line.", "start": 760.5, "stop": 762.14, "id": 155}, {"text": " The transmitter begins to take shape as the base is", "start": 764.08, "stop": 767.84, "id": 156}, {"text": " joined to the power panel unit.", "start": 767.84, "stop": 769.48, "id": 157}, {"text": " Electric hoists are used for ease and accuracy in handling these parts.", "start": 770.58, "stop": 774.26, "id": 158}, {"text": " Now the main power transformer is set in place.", "start": 777.1, "stop": 779.8, "id": 159}, {"text": " This is the unit that steps up the input to the high voltage required to operate", "start": 780.66, "stop": 785.32, "id": 160}, {"text": " the final amplifier and modulator tubes.", "start": 785.32, "stop": 787.74, "id": 161}, {"text": " After the transformer is connected, the entire deck or base is hoisted to a dolly", "start": 789.8, "stop": 795.4, "id": 162}, {"text": " to make handling easier.", "start": 795.4, "stop": 796.9, "id": 163}, {"text": " There's high power equipment on this deck and it's heavy.", "start": 798.02, "stop": 801.16, "id": 164}, {"text": " The second deck contains the audio driver stage and modulator of the transmitter,", "start": 803.16, "stop": 807.78, "id": 165}, {"text": " which makes possible radio telephone operation.", "start": 808.12, "stop": 810.96, "id": 166}, {"text": " This entire unit, built in another plant, has been inspected on the feeder table", "start": 811.62, "stop": 817.26, "id": 167}, {"text": " and requires only a modulation transformer and the phone CW", "start": 817.26, "stop": 823.18, "id": 168}, {"text": " relay to be complete.", "start": 823.18, "stop": 824.98, "id": 169}, {"text": " The top deck of the transmitter, the radio frequency section, begins with the", "start": 827.78, "stop": 833.34, "id": 170}, {"text": " installation of the exciter assembly, which is fabricated at", "start": 833.34, "stop": 836.96, "id": 171}, {"text": " Hallicrafters 26th Street plant.", "start": 836.96, "stop": 838.86, "id": 172}, {"text": " Three separate tuning units may be plugged into this assembly, any one of which", "start": 840.02, "stop": 844.82, "id": 173}, {"text": " may be selected by the band switch.", "start": 844.82, "stop": 846.7, "id": 174}, {"text": " The panel is joined to the frame so that shafts and", "start": 847.92, "stop": 851.36, "id": 175}, {"text": " controls can be properly placed.", "start": 851.36, "stop": 853.22, "id": 176}, {"text": " This is the extension shaft to the band switch.", "start": 854.86, "stop": 857.56, "id": 177}, {"text": " By the use of this band switch connected to the exciter and driver stages, it's", "start": 858.2, "stop": 862.96, "id": 178}, {"text": " possible to change frequencies very rapidly.", "start": 862.96, "stop": 865.42, "id": 179}, {"text": " That's vitally important in military operation.", "start": 866.54, "stop": 870.5, "id": 180}, {"text": " The final amplifier tuning condenser assembly was built as", "start": 881.96, "stop": 888.62, "id": 181}, {"text": " a unit on the feeder table.", "start": 888.62, "stop": 890.2, "id": 182}, {"text": " It is placed carefully in position.", "start": 891.14, "stop": 893.18, "id": 183}, {"text": " Before this radio frequency deck joins the main assembly", "start": 894.46, "stop": 897.94, "id": 184}, {"text": " line, the standoffs are added.", "start": 897.94, "stop": 900.1, "id": 185}, {"text": " The exciter to modulator cable is hooked up.", "start": 902.52, "stop": 905.4, "id": 186}, {"text": " The neutralizing condenser is mounted on the standoffs.", "start": 908.66, "stop": 912.38, "id": 187}, {"text": " The main tube socket is added.", "start": 920.26, "stop": 923.06, "id": 188}, {"text": " Here are the antenna binding posts, through which", "start": 928.82, "stop": 932.46, "id": 189}, {"text": " passes the output of the transmitter.", "start": 932.46, "stop": 934.28, "id": 190}, {"text": " This unit is now carefully inspected before it moves into main assembly.", "start": 936.0, "stop": 940.2, "id": 191}, {"text": " Every element, no matter how large or small, is inspected and tested", "start": 940.62, "stop": 945.6, "id": 192}, {"text": " before it goes into a transmitter.", "start": 945.6, "stop": 947.58, "id": 193}, {"text": " When the radio frequency deck joins the main assembly here, the big", "start": 950.22, "stop": 954.32, "id": 194}, {"text": " job is nearly done.", "start": 954.32, "stop": 955.84, "id": 195}, {"text": " A steady flow of finished units has been made possible by intelligent planning of", "start": 956.72, "stop": 961.58, "id": 196}, {"text": " the work at all Halicrafters plants, perfect coordination with the suppliers and", "start": 961.58, "stop": 967.1, "id": 197}, {"text": " subcontractors, and hundreds of skilled and tireless hands.", "start": 967.1, "stop": 971.76, "id": 198}, {"text": " Now the relays are covered.", "start": 973.46, "stop": 975.16, "id": 199}, {"text": " The smaller tubes are set in place, and the completed unit is", "start": 975.98, "stop": 979.94, "id": 200}, {"text": " ready to leave the assembly line.", "start": 979.94, "stop": 981.62, "id": 201}, {"text": " The transmitter is now ready for the first of many tests it will receive before", "start": 983.42, "stop": 988.66, "id": 202}, {"text": " it earns the stamp of final approval.", "start": 988.66, "stop": 990.76, "id": 203}, {"text": " This is the electrical testing room, where the transmitter's output, modulation,", "start": 993.58, "stop": 998.84, "id": 204}, {"text": " and keying are accurately measured and recorded.", "start": 999.18, "stop": 1002.18, "id": 205}, {"text": " This work calls for plenty of technical skill and knowledge, so the staff here is", "start": 1003.18, "stop": 1008.58, "id": 206}, {"text": " principally made up of experienced radio amateurs.", "start": 1008.58, "stop": 1011.28, "id": 207}, {"text": " Signal core inspectors watch closely these important steps in controlling both", "start": 1013.1, "stop": 1017.34, "id": 208}, {"text": " the quality and performance of the transmitter.", "start": 1017.34, "stop": 1019.7, "id": 209}, {"text": " This test measures the radio frequency output of the transmitter.", "start": 1021.34, "stop": 1025.8, "id": 210}, {"text": " Instead of allowing the signal to radiate over an antenna, these bulbs called the", "start": 1026.92, "stop": 1032.56, "id": 211}, {"text": " dummy antenna convert the RF output into heat.", "start": 1032.56, "stop": 1036.42, "id": 212}, {"text": " Another important test is the one made for overload.", "start": 1038.5, "stop": 1041.44, "id": 213}, {"text": " The purpose of this is to make sure the relays respond properly", "start": 1042.48, "stop": 1046.8, "id": 214}, {"text": " to protect the circuits.", "start": 1046.8, "stop": 1048.4, "id": 215}, {"text": " This is also done to determine the capacity of the entire transmitter to absorb a", "start": 1049.56, "stop": 1055.1, "id": 216}, {"text": " temporary overload in normal operation without breaking down.", "start": 1055.1, "stop": 1058.96, "id": 217}, {"text": " Next, the transmitter is given a trial at sending cold signals.", "start": 1061.88, "stop": 1066.14, "id": 218}, {"text": " When operated in this manner, the audio amplifier and modulator are not used.", "start": 1066.98, "stop": 1071.22, "id": 219}, {"text": " The flashing of these rectifier tubes shows how the key simply makes and breaks", "start": 1072.6, "stop": 1077.84, "id": 220}, {"text": " the output to form the characters of the telegraph code.", "start": 1077.84, "stop": 1081.38, "id": 221}, {"text": " To check how well the transmitter responds to all essential voice", "start": 1082.74, "stop": 1086.58, "id": 222}, {"text": " frequencies, the oscillograph is used.", "start": 1086.58, "stop": 1089.6, "id": 223}, {"text": " This detects any distortion and locates at what point the distortion occurs.", "start": 1090.48, "stop": 1095.42, "id": 224}, {"text": " This transmitter shows a normal frequency response.", "start": 1096.72, "stop": 1099.48, "id": 225}, {"text": " When the lid goes on the transmitter, that means it has passed all the electrical", "start": 1100.74, "stop": 1105.94, "id": 226}, {"text": " tests with an A1 rating.", "start": 1105.94, "stop": 1108.36, "id": 227}, {"text": " It's ready now for the signal core truck.", "start": 1109.38, "stop": 1111.94, "id": 228}, {"text": " In another part of the plant, radio receivers are being mounted on a table", "start": 1114.72, "stop": 1119.32, "id": 229}, {"text": " assembly that makes up the listening end of this communication unit.", "start": 1119.32, "stop": 1123.1, "id": 230}, {"text": " Each table is equipped with two similar radio receivers.", "start": 1124.02, "stop": 1127.48, "id": 231}, {"text": " One operates on the main power supply and the other from an auxiliary battery.", "start": 1127.84, "stop": 1133.2, "id": 232}, {"text": " The entire assembly is tested for proper operation as a unit.", "start": 1134.6, "stop": 1138.76, "id": 233}, {"text": " The two receivers can be operated simultaneously.", "start": 1139.54, "stop": 1142.4, "id": 234}, {"text": " This is the speech amplifier.", "start": 1144.68, "stop": 1146.54, "id": 235}, {"text": " Two separate operating positions are provided.", "start": 1147.72, "stop": 1150.18, "id": 236}, {"text": " Part of the table assembly includes two loudspeakers, two field telephone", "start": 1151.14, "stop": 1155.78, "id": 237}, {"text": " instruments, and a portable typewriter.", "start": 1155.78, "stop": 1158.26, "id": 238}, {"text": " This is the final step in assembly, bringing the transmitter, the receivers, and", "start": 1160.46, "stop": 1166.66, "id": 239}, {"text": " the accessories together and installing them in the truck.", "start": 1166.66, "stop": 1170.3, "id": 240}, {"text": " Once the equipment is mounted inside this door, it becomes officially the", "start": 1171.54, "stop": 1176.2, "id": 241}, {"text": " SCR-299.", "start": 1176.2, "stop": 1177.72, "id": 242}, {"text": " It's on the way to the front.", "start": 1178.9, "stop": 1181.12, "id": 243}, {"text": " Easy does it. There's no room to spare here, and", "start": 1182.76, "stop": 1186.88, "id": 244}, {"text": " there's plenty more to be put in.", "start": 1186.88, "stop": 1188.64, "id": 245}, {"text": " Every inch of space is accounted for in this truck, and these men", "start": 1189.4, "stop": 1193.72, "id": 246}, {"text": " know how to use it.", "start": 1193.72, "stop": 1195.3, "id": 247}, {"text": " A place for everything, and everything goes right into", "start": 1197.0, "stop": 1200.88, "id": 248}, {"text": " place quickly and securely.", "start": 1200.88, "stop": 1202.62, "id": 249}, {"text": " While the transmitter is being bolted to the floor, the table assembly with its", "start": 1203.52, "stop": 1208.72, "id": 250}, {"text": " receiving equipment moves in.", "start": 1208.72, "stop": 1210.34, "id": 251}, {"text": " Accuracy in design and construction makes it possible to save many valuable hours", "start": 1211.56, "stop": 1217.26, "id": 252}, {"text": " throughout the entire production and assembly of the unit.", "start": 1217.26, "stop": 1220.04, "id": 253}, {"text": " There goes the wall cabinet that holds the additional operating parts, extra", "start": 1221.76, "stop": 1226.56, "id": 254}, {"text": " coils, tuning units, condensers.", "start": 1226.56, "stop": 1228.64, "id": 255}, {"text": " And here's the bench that contains the tools and spare parts, a", "start": 1229.76, "stop": 1233.86, "id": 256}, {"text": " radio man's hope chest.", "start": 1233.86, "stop": 1235.4, "id": 257}, {"text": " And this is what it looks like when the operators step in.", "start": 1237.66, "stop": 1241.36, "id": 258}, {"text": " At the far end, the transmitter with the antenna tuner on top of it.", "start": 1242.42, "stop": 1246.98, "id": 259}, {"text": " On the right, the wall cabinet.", "start": 1248.04, "stop": 1250.02, "id": 260}, {"text": " On the floor, the long bench for the operators.", "start": 1251.42, "stop": 1254.0, "id": 261}, {"text": " Both of these are storehouses for parts and accessories.", "start": 1254.96, "stop": 1258.04, "id": 262}, {"text": " On the left wall of the truck, the operators table with two receivers, speech", "start": 1259.94, "stop": 1265.26, "id": 263}, {"text": " amplifier, control panel, and below, an electric heater", "start": 1265.26, "stop": 1270.36, "id": 264}, {"text": " and the two field telephones.", "start": 1270.36, "stop": 1272.46, "id": 265}, {"text": " There goes the SCR-299 out into the field to make its final test on the air.", "start": 1274.12, "stop": 1280.4, "id": 266}, {"text": " There's just one thing missing.", "start": 1281.52, "stop": 1283.44, "id": 267}, {"text": " Where's the power coming from?", "start": 1284.82, "stop": 1286.56, "id": 268}, {"text": " The signal core provides for that in a portable gasoline driven generator that", "start": 1287.44, "stop": 1292.8, "id": 269}, {"text": " rides in this trailer behind each truck.", "start": 1292.8, "stop": 1295.0, "id": 270}, {"text": " This generator supplies standard lighting current, 117 volts AC.", "start": 1295.94, "stop": 1301.22, "id": 271}, {"text": " A transmitter and receiver that operate on this current can be hooked into power", "start": 1302.28, "stop": 1307.0, "id": 272}, {"text": " almost anywhere.", "start": 1307.0, "stop": 1308.58, "id": 273}, {"text": " Here is the mobile power supply.", "start": 1310.12, "stop": 1312.1, "id": 274}, {"text": " A remote control from the truck to the generator makes it possible to start and", "start": 1312.72, "stop": 1317.44, "id": 275}, {"text": " stop the generator at will.", "start": 1317.44, "stop": 1318.94, "id": 276}, {"text": " The operator prepares for the air test.", "start": 1322.12, "stop": 1324.92, "id": 277}, {"text": " His first call is to central control station.", "start": 1325.94, "stop": 1329.12, "id": 278}, {"text": " WXYK, WXYK-4 calling for a check on the quality of this", "start": 1329.52, "stop": 1334.24, "id": 279}, {"text": " transmission and standing by.", "start": 1334.24, "stop": 1336.32, "id": 280}, {"text": " And here is communication going off to war.", "start": 1339.54, "stop": 1342.58, "id": 281}, {"text": " Over these ramps roll hundreds of units that will carry the voice of victory", "start": 1343.2, "stop": 1347.5, "id": 282}, {"text": " to every corner of the earth.", "start": 1347.5, "stop": 1349.48, "id": 283}, {"text": " Like the Champion Thoroughbred it is, the SCR-299 rates a whole", "start": 1349.82, "stop": 1355.84, "id": 284}, {"text": " boxcar to itself.", "start": 1355.84, "stop": 1357.34, "id": 285}, {"text": " This signal core unit is built for action, and to get into action fast.", "start": 1399.88, "stop": 1404.78, "id": 286}, {"text": " It's a highly mobile radio station and may be set up almost every day.", "start": 1405.5, "stop": 1409.46, "id": 287}, {"text": " [...] not used anywhere in battle or invasion activities.", "start": 1409.46, "stop": 1412.08, "id": 288}, {"text": " Speed is vital. Every minute counts.", "start": 1413.12, "stop": 1415.62, "id": 289}, {"text": " The enemy doesn't wait.", "start": 1416.24, "stop": 1417.68, "id": 290}, {"text": " Communications must be ready at all times.", "start": 1418.98, "stop": 1421.54, "id": 291}, {"text": " It may be the only contact over which a blow-by-blow report flashes from the", "start": 1422.96, "stop": 1427.56, "id": 292}, {"text": " local front to the remote commands at Cairo, London, Sydney.", "start": 1427.56, "stop": 1431.46, "id": 293}, {"text": " The SCR-299 in this position is the nerve center of all our attacking forces.", "start": 1433.46, "stop": 1439.9, "id": 294}, {"text": " Artillery, tanks, infantry, air force, many", "start": 1441.04, "stop": 1447.22, "id": 295}, {"text": " of which are widely separated.", "start": 1447.22, "stop": 1448.86, "id": 296}, {"text": " Through the transmitter flow the reports, information,", "start": 1449.78, "stop": 1453.54, "id": 297}, {"text": " timing, and the order to advance.", "start": 1454.36, "stop": 1456.92, "id": 298}, {"text": " This is the voice of victory.", "start": 1457.92, "stop": 1460.04, "id": 299}, {"text": " Contact may be made with an approaching flight of bombers while they're still", "start": 1461.5, "stop": 1465.86, "id": 300}, {"text": " hundreds of miles away from the target.", "start": 1465.86, "stop": 1467.7, "id": 301}, {"text": " To coordinate their attack perfectly, these fliers must know the present position", "start": 1468.58, "stop": 1473.72, "id": 302}, {"text": " of our own tanks, infantry, artillery.", "start": 1473.72, "stop": 1477.18, "id": 303}, {"text": " They get this information by contact with the message center, which speaks and", "start": 1478.26, "stop": 1483.32, "id": 304}, {"text": " listens through the SCR-299.", "start": 1483.32, "stop": 1486.0, "id": 305}, {"text": " Tanks moving into position must be kept informed of the approaching air support.", "start": 1487.62, "stop": 1492.7, "id": 306}, {"text": " Timing is vital.", "start": 1493.86, "stop": 1495.3, "id": 307}, {"text": " And the timing of all these movements is controlled through this voice by direct", "start": 1496.2, "stop": 1500.78, "id": 308}, {"text": " contact with the Armored Forces headquarters.", "start": 1500.78, "stop": 1503.38, "id": 309}, {"text": " From many small stations scattered miles apart along the battle fronts comes the", "start": 1504.58, "stop": 1509.54, "id": 310}, {"text": " flash news, the observations, the unexpected.", "start": 1509.54, "stop": 1513.5, "id": 311}, {"text": " All clearing through this central station.", "start": 1514.0, "stop": 1516.68, "id": 312}, {"text": " That's how radio helps to time these big movements, make them strike most", "start": 1517.94, "stop": 1522.38, "id": 313}, {"text": " effectively and with the minimum loss of American lives.", "start": 1522.38, "stop": 1526.66, "id": 314}, {"text": " Radio communication units are among the first pieces of equipment to go into", "start": 1528.54, "stop": 1532.54, "id": 315}, {"text": " action, whether the attack is on land or sea.", "start": 1532.54, "stop": 1536.16, "id": 316}, {"text": " Radio communications stay in the fight, as long as there are men, guns,", "start": 1538.3, "stop": 1543.5, "id": 317}, {"text": " ships, and tanks on the move.", "start": 1544.0, "stop": 1545.7, "id": 318}, {"text": " For the life, death, or victory of all of them depend upon this command.", "start": 1546.7, "stop": 1551.36, "id": 319}, {"text": " Get the message through.", "start": 1552.34, "stop": 1554.44, "id": 320}, {"text": " Perhaps one of the most important messages ever issued is the one you're about to", "start": 1558.06, "stop": 1562.7, "id": 321}, {"text": " hear from Major General Harry C. Ingalls, Chief Signal Officer", "start": 1562.7, "stop": 1566.9, "id": 322}, {"text": " of the United States Army.", "start": 1566.9, "stop": 1568.78, "id": 323}, {"text": " General Ingalls.", "start": 1569.3, "stop": 1570.46, "id": 324}, {"text": " I'm speaking now as one American soldier to another, for we and the armed forces", "start": 1572.52, "stop": 1577.92, "id": 325}, {"text": " regard each of you men and women in this audience as being one of us and working", "start": 1577.92, "stop": 1583.32, "id": 326}, {"text": " shoulder to shoulder with us.", "start": 1583.32, "stop": 1585.0, "id": 327}, {"text": " You and you alone are responsible for the production and performance of this", "start": 1586.02, "stop": 1592.04, "id": 328}, {"text": " vital piece of communication equipment.", "start": 1592.04, "stop": 1594.04, "id": 329}, {"text": " You have seen enough to know what good communication equipment means to the men", "start": 1594.76, "stop": 1599.88, "id": 330}, {"text": " out there and what it means to victory.", "start": 1599.88, "stop": 1602.72, "id": 331}, {"text": " You have done a splendid job.", "start": 1603.98, "stop": 1605.58, "id": 332}, {"text": " Keep up the good work you have been doing.", "start": 1606.58, "stop": 1608.64, "id": 333}, {"text": " We are asking millions of American soldiers to stake their lives on", "start": 1609.72, "stop": 1614.02, "id": 334}, {"text": " breaking Germany and Japan.", "start": 1614.02, "stop": 1615.66, "id": 335}, {"text": " They asked you to keep up your production with the limit of your ability, and the", "start": 1616.8, "stop": 1622.64, "id": 336}, {"text": " high standards of workmanship that have given us an advantage over the enemy that", "start": 1622.64, "stop": 1628.04, "id": 337}, {"text": " can be measured only on the day of final victory.", "start": 1628.04, "stop": 1630.92, "id": 338}]}