Belmont-Radio-Corp-525 电路原理图.pdf

MANUAL OF MOST-OFTEN-NEEDED RADIO DIAGRAMS OeCIMAlS ABL MlCROFABAOJ WHOLE NUMBERS ARE OHMS. NUMBERS PREFIXED 6V LETTERS ARE PARTS. VOLTAGES ARE- E-ROM POINTS INDICATED TO CHASSIS GROUND. VOLUME CONTROL ON PULL MEASUREOONA C. CHASSIS GROUND Belmont Radio Corp, Schematic circuit diagram Model 52s AC-DC Superheterodyne, with automatic volume control Should it be neeessary, at any time, to rebalance this set the procedure is as follows: Attach a 456 kilocycle oscillator to the grid of the 606 tube in bark of the variable condenser and adjust (he trimming condensers of the I. F. transformers to maximum deflection on nil output motor con nected across the primary of the speaker input transformer. While adjusting these trimmers, the variable condenser should be at the maximum onpaeity positionat the extreme right of Its rotation. MODEL 525 Next disconnect the antenna wire and connect an oscillator In scries with a 7i ntinf. 0:1 - denser to the antenna coil. Rotate the condenser plates to the minimum capacity position txtreme left turn, ami adjust the trimmer comtem-er of the rear section of the variable condenser to resonance with an oscillator set at 1725 kilocycles, then adjust the condenser of fhc front section el the variable condenser to resonance. Aliqn at <4001200I ill.08006005-0 kilocycles. Lend slotted plates of variable condenser if - necessary. 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN