Emerson-Radio-and-Phonograph-Corp-DQ-333 电路原理图.pdf

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1、MANUAL OF 1940 MOST POPULAR SERVICE DIAGRAMS Tmerson Radio MODELS: DQ-333 and DQ-334 MODELS: D?l-333and D? 1-334 LI T4 T2 T3 Ho R2 H6 H7 H3 R9 CIO G14 G4 G15 33 G16 G20-21 G22 G24 Loop antenna Oscillator coil 1.7. transformers 20,000 ohm -5- w. 140 ohm -g- watt 3 megohm -5 watt .5 meg ohm V.C. 15 me

2、gohm 4- w. .5 megohm -4- v/. 200,000 ohm -4 w. 0.1 mfd. 200 v. 0.05 mfd. 400 v. 0.0002 mfd. mica 0.002 mfd. 600 v. Dual 20 mfd. 150 0.2 mfd. 200 v. 0.02 mfd. 400 v. 0.01 mfd. 400 v. Location of Coils and Trimmer Adjustments The first i-f transformer is mounted on top of the chassis deck to the right

3、 of the variable condenser. The trimmers are accessible through holes in the top of the can. The second i-f transformer is mounted on top of the chassis between the variable condenser and the speaker. The trimmers are accessible through holes in the top of the can. The trimmers for the antenna and o

4、scillator coils are located on the variable condenser. The trimmer on the front section is for the oscillator coil. The oscillator coil is located underneath the chassis. The loop antenna acts as the antenna coil. An oscillator with frequencies of 455 and 1400 kc is required. EXTERNAL ANTENNA CONNECTION I.E PEAKED AT 455 K C. I2SA7GT C6j_ ci io Jc7 I2SK7GT . T3 C8_L o) (3 Jc9 I2SQ7GT OUTPUT transformer ON SPEAKER 收音机爱 好者资料库 RadioFans.CN