20:
181:
137:
in Spring 1942. The performance of the SCR-300 during those tests demonstrated its capacity to communicate through interference and the rugged quality of the design. Motorola was to produce nearly 50,000 of the SCR-300 units during the course of
153:
in August 1943. Colonel
Ankenbrandt informed General Meade that "they are exactly what is needed for front line communications in this theater". In his point of view, the main difficulty was keeping them supplied with fresh batteries.
121:
Although a relatively large backpack-carried radio rather than a handheld model, the SCR-300 was described in War
Department Technical Manual TM-11-242 as "primarily intended as a walkie-talkie for foot combat troops", and so the term
361:
Frequency calibration (crystal oscillator) 4.3 MHz 10th harmonic (43.0 MHz) and 11th harmonic (47.3 MHz) marked on channel display - channel 15 (43.000 MHz) and halfway between channels 36 (47.200 MHz) and 37 (47.400
106:, Marion Bond, Lloyd Morris, and Bill Vogel. The SCR-300 operated in the 40.0 to 48.0 MHz frequency range, and was channelized. Along with other mobile FM tank and artillery radios such as the
19:
750:
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36:
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calibration circuit, easy to use tuning/channel selection, tuning lock to prevent accidental frequency changes, and
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Channel
Selection via "TUNING" control, channel display showing channel 0 (40.000 MHz) to channel 40 (48.000 MHz)
162:
75:
459:
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110:(20.0 to 27.9 MHz) and the SCR-608 (27.0 to 38.9 MHz), the SCR-300 marked the beginning of the transition of
512:
215:
103:
172:
The
British adopted the design of the SCR-300 for their own use from 1947 as the "Wireless Set No. 31".
370:
282:
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or retransmission capability using two SCR-300 units and the appropriate cable assemblies.
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74:(then the Galvin Manufacturing Company) received a contract from the
636:. Office of the Chief of Military History, U.S. Army. pp. 667–.
165:. It also became "key equipment" that helped deter confusion in the
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Transmitter plate: 150 volts (using additional 60 volt battery)
680:
Radio Set SCR-300-A, War
Department Technical Manual TM 11-242
542:
The
American GI in Europe in World War II: The March to D-Day
404:
40:
728:. McGraw-Hill Publishing Company. January 1945. pp. 2–.
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259:
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115:
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The founder's touch: the life of Paul Galvin of
Motorola
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16:
WWII United States military portable radio transceiver
646:
633:
The Signal Corps: the outcome (mid-1943 through 1945)
58:-mounted unit was the first radio to be nicknamed a "
538:
J. E. Kaufmann; H. W. Kaufmann (22 September 2009).
582:. Motorola University Press, J.G Ferguson Pub. Co.
573:
531:
377:
78:to develop a portable, battery powered voice radio
575:
539:
623:
369:(4.8 km) (varied considerably with terrain,
244:With battery BA-80: 32.23 lb (14.62 kg)
90:units. The project engineering team consisted of
737:
630:George Raynor Thompson; Dixie R. Harris (1966).
690:
672:
670:
191:The SCR-300 was an 18-tube battery operated
751:Military radio systems of the United States
596:
567:
667:
761:Military electronics of the United States
129:The final acceptance tests took place at
37:Joint Electronics Type Designation System
383:TM 11-242 for Radio Set SCR-300-A (1945)
210:receiver. It incorporated an adjustable
179:
18:
738:
574:Harry Mark Petrakis (1 January 1991).
504:
478:
94:, who conceived of the design using
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484:
371:location of transmitter and receiver
296:, 10 ft 8 in (325 cm)
13:
510:
14:
772:
756:World War II American electronics
206:transmitter section and a double
175:
157:The SCR-300 saw heavy use in the
677:United States. War Dept (1945).
653:. Zenith Imprint. pp. 32–.
650:Secret Gear, Gadgets, and Gizmos
603:Christopher H. Sterling (2008).
378:War Department Technical Manuals
716:
237:With battery BA-70: 38.23
460:AN/PRC-77 Portable Transceiver
145:The SCR-300 saw action in the
1:
471:
393:TM 11-637 for AN/VRC-3 (1944)
546:. Stackpole Books. pp.
513:"The SCR-300 Backpack Radio"
7:
647:Bill Yenne, William Yenne.
609:. ABC-CLIO. pp. 504–.
397:
216:automatic frequency control
23:Motorola SCR-300 circa 1940
10:
777:
746:Amateur radio transmitters
303:Frequency range: 40 to 48
251:Power supply requirements:
65:
683:. United States War Dept.
517:warfarehistorynetwork.com
114:from low-HF AM/CW to low-
698:"SCR-300 Backpack Radio"
310:Channel spacing: 200 kHz
292:AN-131-A: Eight section
264:Receiver plate: 90 volts
365:Range: approximately 3
126:" first came into use.
562:SCR-300 walkie talkie.
281:AN-130-A: Two section
188:
102:who was the principal
24:
455:Vintage amateur radio
388:Vibrator power supply
386:TM 11-983 for PP-114
355:RF Power output: 0.3
183:
22:
96:frequency modulation
487:"About the SCR-300"
450:Wireless Set No. 18
445:Wireless Set No. 19
373:, and antenna used)
167:Battle of the Bulge
440:Signal Corps Radio
220:crystal controlled
195:battlefield radio
189:
185:Signal Corps Radio
25:
660:978-1-61060-744-5
616:978-1-85109-732-6
589:978-0-89434-119-9
557:978-0-8117-4373-0
519:. Sovereign Media
159:Normandy invasion
86:for field use by
39:, was a portable
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704:. Olive-Drab.com
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485:Magnuski, H. S.
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163:Italian campaign
112:combat-net radio
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258:Filaments: 4.5
241:(17.34 kg)
208:superheterodyne
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149:, beginning in
147:Pacific Theater
100:Henryk Magnuski
92:Daniel E. Noble
68:
48:US Signal Corps
17:
12:
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702:Olive-Drab.com
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511:Niesel, John.
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176:Specifications
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76:War Department
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202:. It used an
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187:set SCR-300-A
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60:walkie talkie
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31:, designated
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706:. Retrieved
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541:
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521:. Retrieved
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494:. Retrieved
490:
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324:Vacuum tubes
316:Modulation:
289:(84 cm)
214:circuit, an
190:
171:
156:
144:
140:World War II
128:
120:
69:
52:World War II
32:
28:
26:
725:Electronics
523:28 December
224:radio relay
218:circuit, a
200:transceiver
197:half-duplex
151:New Georgia
104:RF engineer
84:transmitter
44:transceiver
740:Categories
491:SCR300.org
472:References
307:(40-48 MC)
35:under the
131:Fort Knox
70:In 1940,
410:AN/PRC-6
398:See also
274:Antenna:
161:and the
135:Kentucky
88:infantry
80:receiver
72:Motorola
56:backpack
46:used by
33:AN/VRC-3
686:Alt URL
465:SCR-694
435:SCR-536
430:SCR-299
348:1S5 (3)
345:1A3 (1)
342:1R5 (1)
339:1L4 (5)
336:1T4 (6)
333:3A4 (2)
230:Weight:
212:squelch
108:SCR-508
66:History
54:. This
29:SCR-300
708:2 July
657:
613:
586:
554:
496:2 July
425:R-390A
420:BC-654
415:BC-348
390:(1945)
287:inches
118:FM.
405:ARC-5
367:miles
357:watts
320:voice
285:, 33
260:volts
41:radio
710:2016
655:ISBN
611:ISBN
584:ISBN
552:ISBN
525:2018
498:2016
362:MHz)
27:The
550:–.
305:MHz
193:VHF
116:VHF
62:".
50:in
742::
700:.
669:^
560:.
548:51
515:.
489:.
318:FM
239:lb
204:FM
169:.
142:.
133:,
98:,
712:.
663:.
619:.
592:.
527:.
500:.
326::
122:"
82:/
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
