General-Electric-Co-648 电路原理图.pdf

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1、MANUAL OF MSS MOST-OFTEN-NEEDED RADIO DIAGRAMS GENERAL ELECTRIC MODELS 645, 646, 647 and 648 PORTABLE RADIO RECEIVERS ALIGNMENT- (l-Fl PEAK T|6T2 AT 4SSKC (R-F) l. PEAK CIO AT 1620KG, GANG OPEN 2. PEAK CIS AT I500KC, ROCK GANG J. REPEAT STEPS I&2 IF NECESSARY _RN_ R|2 *70 T ISO ROTOR UNLESS OTHERWIS

2、E NOTED CAPACITORS MORE THAN I*MMF CAPACITORS LESS THAN ! MF RESISTORS ARE 1/2 WATT K-1,000 M* 1,000,000 SI* LINE-BATT SWITCH S2- ON-OFF SWITCH S3* BATT SAVER SWITCH FORM 0 -0-s IRS o&c. CONV. SEC,TOP PPL BOTTOM IUS 3V-f DET.-AVC AUDIO 1ST. AUDIO OUTPUT O *lo C 17 ELEC. CAP. IU 4 general information

3、 I-FA HR The Models 645, 646, 647 and 648 are four-tube superhetrodyne three-way portable radio receivers. These receivers operate on AC, DC or batteries and incorporate a battery saver switch, and the use of a ferrite iron-core antenna. POWER SUPPLY: 105-120 volts A-C, D-C or A Batteries -2 Everead

4、y #950 or equi valent . B Battery -1 Eveready #467 or equi valent . AUDIO POWER 80 milliwatts OUTPUT: N-RLC-134 L2 N-HLL-061 LI RTL-152 Tl,2 N-RTO-171 T3 COILS AND TRANSFORMERS COIL -Oscillator ANTENNA ASSEMBLY TRANSFORMER -I-F TRANSFORMER -Output LOUDSPEAKER: Size . Type. Voice Coil Impedance 400 cycles . . . 4 inches Alnico PM 3.2 ohms OPERATING Tuning Range.540 to 1600 KC FREQUENCIES: I-F Amplifier. 455 KC 37 收音机爱 好者资料库 RadioFans.CN