Lear-Inc-661 电路原理图.pdf

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1、收音机爱 好者资料库 RadioFans.CN MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS I2SK7 LEAR Model 661 4 I2SK7 35Z5GT ALL VOLTAGES SHOWN ARE O.C. MEASUREMENTS TAKEN FROM B-WiTH A 1000 OHM PER VOLT VOLT- METER. SET OPERATING ON IITV.,60WITH VOLUME r-(p WTSV. CONTROL ON FULL ANO BANO SWITCH IN BC. POSI- T . TiO

2、N. ALLOW 10% ON ALL MEASUREMENTS. IZMg; I2SA7 ALIGNMENT 35L6GT GENERATOR BAND DIAL AND ALIGNMENT CONNECTED DUMMY SWITCH CONDENSp TRIMMER REMARKS OF TO ANTENNA FREQUENCY SETTING SETTING Set dial pointer to last tnark at low frequency end of cfial with gang condenser closed._ 2nd. IF 12SA7 rui i cm Ma

3、x. Output 1st. IF Max. Output Ant lead 1500 KC 1500 KC C13,C8.CN Max. Output DC and B- 200 mmf. ggg BC 600 KC_CIA Osc. Padder Repeat operations U and 5 until alignment frequencies fall on correct calibration points 5 MC I C15,C9,C5 | Max. Output Ant. lead | 400 o 2 and B- and B- (res.) 1800 KC 16 MC

4、 6 MC Rock dial while trimming C16 at 16 MC BAND SWITCH SHAFT. TUNING SHAFT 1800 KC 16 MC |C16*,C10,C6 I Max. Output 6 MC Check sensitivity and dial calibration I jON-OFF SWITCH B j I IVOLUME CONTROL OIONE CONTROL C39,C40 SW.* I a 2 ANT. COILS B.C. ANT. TRIMMER - ELECTROLYTIC OUTPUT CAPACITOR I2SF7

5、C4I,C42-7 I2SK7 35Z5GT I.F.AMP.DET.AVC I.F. TRIMMERS 1ST AUDIO RECT. LOOP ANTENNA C5 0 SW.#I ANT. C6 0 SW.#2 ANT. BACK VIEW OF CHASSIS SW.2 R.F. TRIMMER SWL* I R.F. TRIMMER 8.C. R.F TRlMMER- ON-OFF SWITCH ft TONE CONTROlQ VOLUME CONTROlO B.C. OSC. SWLW2 TRIMMER OSC. 013 0 0016 TUNING 014 0 0CI5 B.C.OSC SW.#I PADDER OSC. Qband switch shaft FRONT VIEW OF CHASSIS 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN