Zenith-Radio-Corp-4L42 电路原理图.pdf

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1、MANUAL OF 1953 MOST-OFTEN-NEEDED RADIO DIAGRAMS Zenith Radio Corporation model L406 chassis 4L42 CHASSIS 4L42 r 40oAj 50M.W. OUTPUT ANTENNA HANK _ 0 IL6 CONVERTER kvv- 94MEG. V- DUMMY rsTiomc* -WA-1 r VOL.COHTROll DENOTES COMMON RETURN ALL VOLTAGES MEASUREO FROM COMMON RETURN TO POINTS INOICATEO WIT

2、H A D.C. VACUUM TUBE VOLTMETER. ( USE ONLY ZENITH NON-INOUCTIVE ELECTRO LYTIC CONDENSER FOR REPLACEMENT. IF ANY OTHER TYPE OF ELECTROLYTIC IS USED, IT WILL BE NECESSARY TO ADO PARTS SHOWN ON DOTTED LINES- I It ItSO IIOO SE-lX C20aL C20b1_ CZOcIi IOM66 stoo-m :iox l . I F. FREQUENCY 455 KC TUNING RAN

3、GE 4-6 |6 IMC. 535KC. TO I620KC 0=()=Hg) ANTENNA COIL For alignment information see preceding page. cli CIA CIC CIO CIE i DIAL CABLE DRAWING Z/3 TURNS AROUNO PULLEY *-B.C. OSC. PAOOER I-SW. OSC-TRIMMER -B.C. OSC. TRIMMER - SW. ANTENNA B.C. ANTENNA */* TURNS AROUNO /pulleys -22 TURNS AROUNO GROOVE IN

4、 SHAFT 2 TURNS AROUNO RIVET ALIGNMENT PROCEDURE OSCILLATOR COIL Connect Osc. to Dummy Ant. Input Sig.Freq. Band Converter Grid . 1 mf d , 455 Kc. BC 16.1 Me. SW Antenna & 200 mmfd. Me. SW Chassis in series 1 with 400 15.5 Me. $w Two turns ohm carbon resistor 16 20 Kc. BC loosely 1400 Kc. BC coupled to W avemagnet 600 Kc. BC Set Dial Trimmer at Open Gang Close Gang Rock at .15,5 mq. Open Gang 1400 R ock at 600 kc. Align.Pri & Sec. T 1 & T2 Purpose Align I .F. Set Osc. to Scale Set Osc. to Scale Align SW Set Osc. to Scale Align Ant. Set Padder 收音机爱 好者资料库 RadioFans.CN