SCR-194_SCR-195_BC-222_serv_user_TM11-238_1942.pdf

《SCR-194_SCR-195_BC-222_serv_user_TM11-238_1942.pdf》由会员分享，可在线阅读，更多相关《SCR-194_SCR-195_BC-222_serv_user_TM11-238_1942.pdf（66页珍藏版）》请在收音机爱好者资料库上搜索。

1、 , I RADIO SETS SCR-194 AND SCR-195 AND AUXILIARY EQUIPMENT AprD 17, lW/ rLAf;SlfICATION CA1WEI.Un, in accordanCil lith p1r. :;, AI :1O:i, hy iluthorily or w,n, Circular 49 19.4;. , , .TJI 11-238 UI13 TlDCHNTCAL MANUAL) NO). 11238 WAR DEPAllTMlllNT, ,!l WAflBIlIotO!I. AprU 11. 11142. rll/I: RADIO SE

2、TS SCR-IM AND SCR-I95 AND AUXILIARY i #;)- EQUIPMENT . SIICTION I. llineral. !u . ph Purpose _ 1 General description _ _ Major component parts _ _ Description of parts _ _ II. Employment. Location and selection of freq.uencies _ _ -. . ,ttmg up eqUipment _ _ General operatioll _ _ Portable operatiol

3、l _ _ Vehicular operation _ _ 2 3 , , 6 7 8 , Service _ 10 Storage _ 11 III. Detailed functioning of parts. Radio set SCR-l94_ 12 Radio set SeR-19S_ _ _ _ _ _ IS IV. Supplemental data and parta list. Frequencies and dial settings, radio receiver and transmitter BC-222_ 14 Frequencies and dial settin

4、gs, radio receiver and transmitter BC-322_ Hi Parts list_ 16 V. Remote control equipment RC-.66. Purpose _ 17 Setting up and oollnecting_ 18 Operating _ .:_ 19 Removing from service_ 20 Detailed functioning of parts_ 21 Parts lisL_ 22 VI. Antenna equipment RC-63. Purpose _ 23 Setting up and connecti

5、ng_ 24 Operating _ 25 H. . fro . -:;-_IDovmg m servlce_ 26 Parts Iist._ 27 1 M558598 Or . 1 . UNIVERSITY Of C/o.lJfORNlA Tl!I( 11-238 , . SIGNAL COflPSl VII. Carrier FM-32 and frame FM-33. Parqrop/l Purpoge _ 28 -. . LIt!tOlnptlOfl _ _ lEImployUlent- VIII. Bag BG-82. Purpoge _ _ -. . rlptlOn _ _ Edn

6、ployUlefll- SECJION I GlEINlEIRAL 29 30 31 sa IaVOP Purpoee_ _ _ _ _ _ 1 Oem.1 dlpllo_ _ . _ + _ _ +_ 2 Major rompo . m JIll r1ll_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 3 Do!ecrlpUon of )lfIrtll_ _ _ _ _ _ _ _ 4 1. Purpo8e.Radio sets SCR-I94 and SCR-I95 are intended for point-t

7、o-point voice communiclltion within the artillery battalion and infantry regiment, respectively. 2. General deacription.-I. Radio sets SCR-I94 and SCR-195 are highly portable, loll power, high frequency sets which include transceivers. They Ilre u9i!d to OOffiDlunicate Oer distances up to 5 miles. A

8、ll the equipment required for transmission and reception is carded on the bllck of the opentor in It canvas bllg. For ve- hicular operation radio set SCR-195 ineludes stee1 mast ons and a mast base with meaIlll of connection to the set to repJa.ce the tele- scoping tubular Itntenna used when the set

9、 is cllrried on the opera- tors back. Radio set SCR-I94 does not include aCll:lSSOries for vehicular operation but antenna equipment RC-67, which compri!188 the vehicular antenna aooessories, is furnished as a separate unit when required. Power for both transmitting and receiving is sup- plied by on

10、e dry battery. b. Radio set SCR-ll has s frequency range from TS-ll- E. 3. Major component part.-a. Radio u t ,SOR-19. (fig. 1).- The radio set SCR-l94 and associated equipment is divided into two parte for operation and transportation. (1) For portable use the following equipment is carried in bag

11、00-11 on tbe back of the operator and constitutes a complete trans mitting and receiving unit with antenn!, and power supply: -t- 1. . . An.enna AN- 29-B t . 1. . . Bag BG-71-. 1. . . . . Battt!ry BA- 32 . 1. . Headooet H8-n-B . I . Microphone T-24-E. . . . 1 _ _ _ _ Radio neel, and trall.llmit.er B

12、C-222 . 1._ _. _ Tube VT- 33 _ ._ _ _ _ ._. _ . _ _._ _ 1 _ _ Tube VT-67 . WMP1o _. . , 200 . . . gtr .Iff, UNIVElTY Of CAlifORNIA TM 11-238 SIGNAL CORPS au . 4,_II.dloo 0eCIt.loI . 8 o.9olff, UNIVElTY Of CAlifORNIA , I r RADIO SET; SCR-IH ANI) SCR- I U TM: 11-238 on Ole microphone or hllndset. The

13、!let Usell a superregeherative de- teewr and radio-frequency oscillator in a. modified form of Hartley circuit. Controls are proided llS follows: chlumel or frequency IId- justlllent, ca.libration 8witch, calibration adjustor, filament rheostat, and filament switch. The meter on the left aide of the

14、 panel indi- cates the loltage on the filaments, and the !IOCkeL llt the right senteR to conneet the IlIIlId!;et or headset and microphone. b. DWl ,eak ploftl.-Rndio receivers and transmitters BC-222 and BC-322 are eRch provided with H dial !Cale. which is marked off in 400 kilocycle subdivisions an

15、d printed on a metal plate. Many sets are equipped a.I!O with a 600 kilocycle scale, the two scales being se- cured to the panel, one oer the other, by means of live machine screws. Use of the 400 kilocycle scale only is now authorized. To interchange Ole dial scale plates it ill necessary to remoe

16、the five screws, interehllllbte the dilll scale plntes, and replace the screws. Tllbles of fll!quenCies llnd dial divisions are gil-en in IieCLion IV. (Earlier sets were provided with a. reversible celluloid dial scale plate.) e. Ante/l1lal AN-e9-B ANB.-gtr .Iff, UNIVElTY Of CAlifORNIA TM 11-238 SlG

17、SAL CORPS are 9Cl(!wed into plsce on the insulated antenna mounting on top of the case. The radio set SCR- I94 is operated with all twehe sections of A.N-29-B drawn out usiug coil C-17-i, marked A; with the ten largest or lower sections using coil C-175, marked D. The radio set SCR-195 is operated w

18、ith all eight seetions of antenna AN-3().D drawn out. The calibration of either set will be oorrect only if the antennas are e:rtended to the proper lengths at all times or operated U 1._IIQ hr u .wle, uo.:-n . Bly . bOWIB _ltI or .I! . , Ill . 1.,.1100 r . nno ropIlQ 1 . d !ruomlu . BC-:I2 0, /:IC-

19、:n2. nelot, old Jf eb . ObQwlD, pi, ,bleb ftU Into _kH QD bo.tr, 11.1._32. 11 Or;gtr .Iff, UNIVElTY Of CAlifORNIA TJd: 11-238 SIGNAL CORPS 12 Or;gtr .Iff, UNIVElTY Of CAlifORNIA , , RAbIO SElS SCR-lIlt AND SCR-IIl TM 11-238 have enameled marks of the sam RodW ,I 8O19 1 headset HS-22-B 1 microphone T

20、-24-E Rodw I 8CJ9 1 adapter S().52 2 handsets TS-ll-E and II. pocket on the aide for carrying the antenna AN-29-B or AN:.w-B. To permit operation of the set while being carried in the bag, there is a hole in the top of the bag so that the antenna may be inserted in the set and a slide fastener in on

21、e side to permit access to the set panel Further to protect the equipment in inclement weather and when not in use, an additional Dap has been added to the top of the bag. This Bap may be flLlltened down with the two 13 Or, .11, UNIVERSITY Of C/o.lJfORNlA TlI 11-238 SIGXAL CORPI! la.-Bcu; 14 . If, U

22、NIVERIilY Of (lIFORNI , , TM 11-238- RADIO SETS SCR-l14 AND SOR-L9 . end snap fasteners, or when the antenna is being used it may be turned back into a double fold and fastened by the one center snap fastener. It is important that a double fold be used because a single fold results in snapping the f

23、astener together inverted. When so fastened, the force necessary to use to unfasten it mll.y rosult in tearing one side of the fastener from the bag. h. Bo!; BX-13 (fig. 13).-This consists of a tid rectangular metal boll: provided with a socket which fits the plug at the bottom of the radio receiver

24、 Ilnd transmittel BG-222 or BC-322, several binding posts, and Il battery cable. It is designed to provide means of oon- necting separate batteries to the set ill case there is no battery BA-32 available. and to facilitBfAl the insertion of meters in the several cireuits. The batteries aIS connected

25、 by means of the cable, all leads of which are identified by stamped metal markers. TIle binding posts, four on either side, serve to provide ady connection of meters to indicate microphone current, relay current, plate current, and plate ,oltage. IMPORTANT: If it is desirod to use this box without

26、simultan- eously conneeting meters, each of the three pairs of binding posts markoo MICRO. CUR., RELAY CUR., and PLATE CUR. must be connected with a jumper wi, otherwise there will be three open circuits. Do not jumper the binding posts marked PLATE VOLTS, a.s this will short-circuit the battery. Ca

27、ution: When making or changing jumper connections on box BX-IS, be sure tJlat the battery cable is disconnected. from the battery. If this is not done, it is difficult to avoid burning out the two tubes sumultanoous!y. Do not attempt to make or change these jumper connections even if the filalllent

28、switch is tUnied off, unless the battery is disconnected. (1) To provide operllting batteries if bat.tery BA-32 is not avail- able, the following Signal Corps batteries are suggested from among thoaa which may be on hand: , A (Ii!5 on one side and two 90Ckets similar to 90Ckets 8Q.-45 on the other.

29、All wmng lS within too fitting. The uuit sele to enable the two handsel.ll TS-ll- E, provided with the radio set 8CR-196, to be connected simultaneously. The plug of the Ildnpter fits into socket 80-45 on I the P/luel of the ndio re:eiver and tnllsmitter UC-322, and the two sockets of the adapter ac

30、eummodate the plugs on the end of the handset cords. j. lleatilJct llS-tB-B (fig. lli).-The headset con!ists of two receh, el8 (similar to receiver R-14 except that each is equipped with II special ca.p and a cushion MC-14l) ath ched to a strap 81-20 to fit o,er the welirers head and a lenther strap

31、 below. The Illtter is adjustable to fit the wearer by means of a sliding sloo,e which may be locked in place. The headset cord CD-WI is terminated by a plug PJ.r.51i which fits into 8 jlLck JK-38 on the microphone cord. This headEet is part of the radio set 8CU- t94. It is desibrned to combine ligh

32、t weight with :omfort and Illay be worn under a hilt, helmet, or with a blUl mask. 16 ( Ortr olff, UNIVElTY Of CAlifORNIA , I RADIO SETS SCR-i114 A.D seR-iIIS TM 11-238 , k. Mit.:ropIO T-24-E (fig. 16).- The microphone comprises a hand microphone with a !lIIitch to which is connected a cord made of

33、cordage CD-146, II jack J K-38 (for the attnchment of one or two headaels HS-22-B), a radio frequency choke and II. plug PL-too for connection to the radio n!Ceiver find transmiuer nC-222. This microphone is pllrt of the radio set SeR- I)4 . II72_n_. 17 ( Or . If, UNIVElTY Of CAlifORNIA TM 11-238 Si

34、GAL CORPS t. Halldue TS-Il- E (fig. 17).-This consist8 of II. microphone ele- ment., II IIWitch, lind II high impedance receiver mounted inlegrlll1y. Its cord is identical with that of microphone T-24-E except thllt 6 , . ( . , bo . tl_ I . le10. to. 1!.X_13). 18 Or . If. UNIVElTY Of CAlifORNIA trtm

35、ent as tbe box BX-13 and sepun.ted there- from by a wooden block. . 8J:CIlON IT EMPLOYMENT P . ph Loeatlon TId IleleerlQI) f)f t reqllllnd_ II !leUI. up equll).mt_ _ _ _ 6 aeneral opel8.tlol) _ _ 7 Porlable operatton_ _ _ _ _ _ 8 VehiCUlar operatloD_ _ 9 . 8enlcll _ c_ _ 1 U SIQrage_ _ _ _ 11 !i. Lo

36、cation and selection ot trequencies.-The most suitable location . ithin any givell area for uperation of this set will be determined by military requirements snd the kind of terrain in the area. between transmitting and iving points. In general, ele- vated poSitions with line of sight between points

37、 are advantageous, lIS the field stnmgth of the signal is affected considerably by ground elevationa, ridgea, and structures, as well lIS by the distance be- tween tlansmitting and receiving points. With ranges of 8 to ti miles or more the fTequency or channel chosen lIhould be as low as pennissible

38、. This is particularly true if irregulllr terrain, ridges, or hills lie between the selected loeationa. At frequl:lllcies in the 19 0. . 1igned frequencies or channels of muimum separation, depending uJlQn those a.vailable. 6. Setting up equipment (fig. 19) .- Place the radio receiver and transmitte

39、r BC-222 or BC-s22 on top of the battery BA-32 90 that the marking FRONT 011 the battery is at the front of the set. This insures that the battery plug of the set iB properly inserted. in the battery et. Secure the battery to the case by fastening the two straps which pass underneath and around the

40、battery. Remove the front cover by releasing the Bnap slide at the bottom and pulling the cover out slightly and then down. This exposes the front panel. Open the top cover by releasing the two snap slides, one on either side, and raise it. Insert tubes VT-33 and VT-61 in their rwpvctivfl 9OCkefi an

41、d place the desired coil on the terminal posts provided. The two plug-in coils are designated coil C-114: and ooil C-115 and are furnished as a part of radio receiver and transmitter BC-222. Coils C-114 and C-11!5 are also marked with the letters A and B respectively. These letters are followed by t

42、he serial number of the radio receiver and transmitter to which the ooils belong. The coils RIll not interohangeable from set to set. Coil C-114 oovers the fre. ( quencies from Cl.1 to 38.6 megacycles, and coil C-11!5 oovers the fre- quencies from 86.9 to 52.2 megacycles. The coil not in use is carr

43、ied on a bracket inside the case (fig. 1). The coil in radio receiver and transmitter BC-322 covers frequencies from 52.8 to M.B mega- cycles. Connect the antenna lead of the coil to the antenIUL terminal post in radio receiver and transmitter BC-222. This lead is already attlU:hed in radio receiver and transmitter BC-322. Close the oover and secure it with the snap slides. Antenna AN-29-B is for U911 with radio receiver and transmitter BC-222 and II.ntenna AN-30-B is for use with the radio receiver and trans