RCA-Victor-Co-Inc-RADIOLA-18 电路原理图.pdf

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1、MANUAL OF MOST-OFTEN-NEEDED RADIO DIAGRAMS RCA RADIOLA 18 (105-125 Volt*, 50-60 Cycle A.C.) J 41 COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS Internal connections Schematic circuit illustrating method of obtaining condensers. _ 1 _ f L T _ 收音机爱 好者资料库 RadioFans.CN PAGE 7i-A RADIOLA 18 VICTOR 7-11,

2、 7-26 VFO. 3 MESS BROWN -1.000I6RED; .c. , SET US112. 00 G ME Is, A F UX-112-A s SRFR20.0001 YELLOW -SOME MODELS NRVE THESE CONDENSERS IN THE POSITION INDICATED ET DOTTED - PILOT LIGHT 2.E. A F u A -171-A o0 0 GROUND TO FRAME OUTPUT JACKS 0 0 PLATE RESISTOR FILTER REACTOR C BATTERY = 4 MED 00.11.595

3、11. BOA 55515 -L0001/0r- FILTER Bi FILAMENTREACTOR RESISTOR TERMINAL STItio Schematic circuit diagramofRadiola 18 D.C. TERMINALSVOLTAGE 1 to 3 5 volts 3 to 5 30 volts 4 to 518 volts 5 to 7 75 volts 5 to 9100 volts 7 to 925 volts CONDENSER. BANK RED-iKg TOTS 27 S VOLTS D C GROUND TO FRAME IRE VOLTAGE

4、, ADJUSTMERT SWITCH BLUE4-4(f45 e4owN-.1,Lt6 jwN.rifB ADJUSTMENT OF R. F. COMPENSATING CONDENSER Locate the position of the compensating condenser adjusting screw at the rearof the receiver assembly. With the volume control at the position of maximum intensity, turnthe screw to the right until the s

5、et goes into oscillation. Then turn the screw to the left until all oscillation and howl is eliminated with the volume control at maximum.In some cases interchanging the tubes in the R.F. stages will facilitate this adjustment. RCA VICTOR DIVISION OF RADIO CORPORATION OF AMERICA, CAMDEN N. J., U.S. A.