John-Meck-Industries-Inc-RC-5C5-C 电路原理图.pdf

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1、MANUAL OF 1946 MOST POPULAR SERVICE DIAGRAMS JOHN MECK INDUSTRIES, Inc., Plymouth, Indiana I.F. ALIGNMENT: The step-by-step routine given below should be carefully followed after reading the Preceding instructions: |. The modulated oscillator must be tuned to 455 K.C. 2. Connect the high side of the

2、 oscillator output to the lug on the R.F. section of the gang condenser. The low side of the oscillator is connected to the chassis through a .01 condenser. 3. Set the gang condenser of the radio to 1720 on the dial and turn the volume control on full. 4. Adjust the four I.F. trimmers tuning each ca

3、refully to get the maximum de flection of the output meter. Reduce the oscillator output if the output meter goes off scale. 5. Repeat all four adjustments since the adjustment of each I.F. trimmer may ef fect the others to a certain extent. VOLTAGE TABLE - Use high resistance voltmeter of 1000 ohms

4、 per volt -65 to-1.2 78 0 to 5 110 Circuit Symbol Part Number I2AC 36AC 115 AC Description I2SA7GT CI.C2 CI.C2 Cl ,C2 CI.C2 C3,C4,C|0 C5 C6.C7 C8,C9 Cl IA.CI IB.CI |C Rl R2 R3 R9 R5 CV-10002 CV-I0002-A CV-I0002-B CV-I0002-C CP-14503 CM-15500 CM-15251 CP-14103 CL-10001 RC-32002 RC-31005 RC-32004 VC-1

5、0103 RC-32503 Condenser-Variable, with pulley Condenser-Variable, with pulley Condenser-Variable, with pulley Condenser-Variable, with pulley Condenser-Paper, 0.05mfd. 400V Condenser-Mica, 0.00005mfd. Condenser-Mica, 0.00025mfd. Condenser-Paper, 0.0|mfd. 400V Condenser-Electrolytic 20/20/20 mfd |5 R

6、esistor-Carbon, 20,000 ohms ywatt Resistor-Carbon, |0 megohms jwatt Resistor-Carbon, 2 megohms jwatt Control-Volume, with switch, I megohm Resistor-Carbon, 250,000 ohms jwatt R6 RC-35003 ResIstor-Carbon, 500,000 ohms jwatt R7 RC-31500 Resistor-Carbon, |50 ohms iwatt R8 RC-32000 Resistor-Carbon, 200

7、ohms jwatt R9 RC-3I00I Resistor-Carbon, 1000 ohms watt CIRCUIT DIAGRAM MODELS RC-5C5? RC-5C5-A; RC-5C5-B and RC-5C5-C 50L6GT I2SK7GT I2SQ7GT C9 i-|- .n /I jpATTLctol Q0- 35Z5GT IIZS07 I2SK7 3525 L rA I2SA7 50L6 llA cIiib ICjllC R8 R9 I.F 455KC. COMPILED BY M. N. BEITMAN, SUPREME PUBUCATIONS 7 收音机爱 好者资料库 RadioFans.CN