Western-Auto-Supply-Co-D-2108 电路原理图.pdf

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1、MANUAL OF 19S2 MOST-OFTEN-NEEDED RADIO DIAGRAMS WESnRN AUTO SUPPLY COMPANY MODELS D-2108, D-2109 (FACTORY MODEL 237) TRUETONE RADIO RECEIVER ALIGNMENT PROCEDURE Output meter connection . Across 3.2 ohm speaker voice voil Output meter reading to indicate 0.05 watt across speaker voice coil . 0.4 volt

2、 Generator Modulation . 30%, 400 cycles Position of volume control maximum (fully clockwise) Position of pointer with Rotor full open (Plates out of mesh) . slightly beneath the 1620 kc calibration mark on the dial (pointer horizontal to light) 1 SIGNAL GENERATOR 1 Trimmer Adjustments (In order show

3、n) Position of Voriablt Frtqutncy Dummy Anttnna Connection to Receiver Ground Connection Rotor Full Optn (Platts out of mask) 455 kc. .1 mfd Grid of 12BE6 (Pin 7) B- Input and Output Trimmers on I.F Can T3 and T4 Rotor Full Opon i , (Plotosoutofmosh) 1“0 kc. MOO kc. too kc. 1400 kc. 600 75 mmf 75 mm

4、f 75 mmf Antenna Hank Antenna Hank Antenna Hank Chassis Chassis Chassis Oscillator Trimmer T2 Antenna Trimmer Tl (Check Point)* *With a generator frequency of 600 Kc, tune the set to the point where maximum output is obtained, which should be approximately 600 Kc on the dial. Align for maximum outpu

5、t. Reduce input as needed to keep output near 0.4 volts. The alignment procedure should be done in the order given for greatest accuracy. Always keep the output from the generator at its lowest possible value to prevent the AVC of the receiver from interfering with accurate alignment. I2BE6 MIXER a

6、osc. I2SQ7 DETECTOR A.V.C. a IM AUDIO iol 35Z5 POWER RECT. OFF-ON SW. (ON VOL.CONTR.) 50B5 I2BE6 I2SQ7 IISV. O.C. OR L iv.80-eo A.C. PREOUENCY RANGE-S32.S TO I620K. I.F - 458K.C. ALIGN R.F. TRIMMER Tl ATI4O0K.C. ALIGN OSC. TRIMMER T2 AT I620K.C. TRACK AT GOOK.C. UNLESS OTHERWi NOI ED. RESISTORS ARE CARBON. 1/2 WATT,20%. CONDENSER DECIMAL VALUES ARE IN pf.,500V0LTS, WHOLE NUMBERS |N ppL, 400 VOLTS. MOLDED PAFER, KM.OOO. M*l.000,000, 143 收音机爱 好者资料库 RadioFans.CN