General-Electric-Co-L-660 电路原理图.pdf

《General-Electric-Co-L-660 电路原理图.pdf》由会员分享，可在线阅读，更多相关《General-Electric-Co-L-660 电路原理图.pdf（3页珍藏版）》请在收音机爱好者资料库上搜索。

1、MANUAL OF 1942 MOST POPULAR SERVICE DIAGRAMS GENERAL ELECTRIC Six-tube Superheterodyne with Electric Tuning Keys MODEL L-660 Alignment Frequencies With the gang condenser plates completely closed, the end RP.1500 KC of the pointer should line up with the first mark to the left ip . 455 KC of the dia

2、l reflector plate. If it doesnt the pointer can be The chassis must be removed from the cabinet as described moved on the dial cord until it does. Set the signal generator above to make the following alignments. The locations of all to 1500 KC. Set pointer to the 1500 KC mark (extreme right trimmers

3、 is shown in Fig. 1. flange mark) and align (C2B) to the signal. Peak (C2A) for . maximum output. IF Alignment Connect an output meter across the voice coil. Turn the - volume control to maximum. Set test oscillator to 455 KC and pjn s,boi iwhp keep the oscillator output as low as a readable meter r

4、eading hc-jwj - 0*77* c5jrawn=j=ir5E=risa will permit. ggrgf a 84M8 IS=S8?S!: SS “ T Apply signal to the 12SA7 converter grid through a .05 S, gJKggSzafJfS.iSS?.:.: = mfd. capacitor and align progressively the trimmers in the f iso v. j IT*:*) v|l/ i When making the following alignment the loop ante

5、nna (g) (D “ $ I must be bolted to the chassis by the two mounting screws. v.-p.,.: ,. S s* Since the glass dial scale is fastened to the cabinet, it cannot Stag * *w“2. : (U) R * JJ . be used for reference during the alignment of the chassis |8:ijS K 51! Ill3: _ * outside the cabinet. Use must be m

6、ade therefore of the four p 8i I Qj) E calibration marks at the botton flange of the dial scale r* R5iTojKMwtSSia. aw.carbon. ; j reflector plate (immediately below end of dial scale pointer). jjjclao 5?$10,11 -1 These marks referring from left to right are as follows: ggfjig IS!?8i=IrSSrisg?h Refer

7、ence point, 580 KC, 1000 KC, and 1500 KC. rums u BAB3K5c6pRioopnawnanand The RF signal should be capacity coupled to the receiver RU9083 ITS IcSllKaCMcwiiAdcu*: loop by placing a two foot piece of wire for an antenna on the test oscillator output post (high side). Keeping this antenna two feet or mo

8、re from the receiver loop will generally insure freedom from too much coupling. i- i Toc-I* R.F TOR-SAW I2SK7 I2SK7 351667 35Z56T triuNfi 2A. IB amtiMd). SC-018 06 0-1818 R1 (-1881 R8 R( -1888 RS Rl -1888 R4 Rt -1888 RS jfe SI., CAPAC TOR180 Uiaf. mica. CAPAC TORMfd.,800V.paper. . CAPAC TOR.O8MM.S0O

9、V.paper. CAPAC TOR0.1 MM. 400 V. paper. . CAPACITOR47 Mori., mica. CAPAC TOR.01 MM.,800V.paper. CAPAC TOR M MM.800V.paper. CAPAC TOR80 MM., ISO V IfT 1 CAPACITOR88 Mfd.l80 V? | TRIMMER STRIPStaUen key ndjnet- TRIMmSr STMPStation W ndhut CiSA?IroRiijd.,8 V. paper/.i RESISTOR88ohm. HWjarbon. RBSISTOR6

10、800ohm. MwTearbon . STOR47,000oha, UW. carbon. 8T0R83000 ohm, 8 W. carbon . 8TORISOofea, H rbco. 18TOR IJufohau, HV.carbon. 0MB CONTROL0.5 -mefohm coa- RBS STOR8Awjeofcwi. MW.emrbon. RBS 8TOR470.000dunj% W. carbon. Rp STORlOOohae, MW, carbon . RBS STOR1,000ohouSW.carbon. SWITCHTonecontroliwitcb. . S

11、WITCHAetoaauc Mara| twitch fieeej RBAMCOPRUopaattaaa and eat! COI! 1! 1.! TOC-IA.RF. sSEC.OF TUN. CAP. TO 0-1 ONS. RF8MR Toc-ie 0SCSEC.0F TuSr CAR mm Selector Switch Wiring FRONT OF CHASSIS BOTTOM VIEW OF CHASSIS I2SA7 C0NV. 0SC. I2SK7 I F AMP ,PREEN BLUE 0ET a AUDIO CIO OUTPUT me R0 74 C8, BLUE BLACK 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN