United-Motors-Service-Delco-988672 电路原理图.pdf
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United-Motors-Service-Delco-988672 电路原理图.pdf
40 收音机爱 好者资料库 RadioFans.CN VOLUME R-18, MOST-OFTEN-NEEDED 1958 RADIO SERVICING INFORMATION AUDIOPOWER SUPPLY UNIT PARTS LAYOUT CHASSIS VIEW RFUNIT TUNER UNFOLDED j=ir PARTS LAYOUT TUBE VIEW SIGNAL SEEKING TUNER ALIGNMENT PROCEDURE: PARTS LAYOUT CHASSIS IEW Output Meter Connection Generator Return VIA M From AVC Line To Chassis (see Parts layout) Receiver Chassis Step Dummy Antenna Connect To Signal Generator Frequency Tune Receiver To Adjust in Sequence i 0.1 Mfd. 12BE6 Grid (Pin 7) 262 KC *High Frequency Stop A, B C (Max.) 0.1 Mfd. 12BE6 Grid (Pin 7) 262 KC High Frequency Stop D (Min.) 3 .000068 Mfd. Antenna Connector 1615 KC High Frequency Stop *E, F, G (Max) 4 .000068 Mfd. Antenna Connector 600 KC Signal Generator Signal J, K (Max.) 5 .000068 Mfd. Antenna Connector 1615 KC Signal Generator Signal F, G (Max.) 0 .000068 Mfd. Antenna Connector 1100 KC Signal Generator Signal *L *To tune to high frequency put a 0 070 feeler gauge (or hare #13 wire) in slot against the high frequency stop. (See tuner pictures). Turn manual control to allow the planetary arm to run against tne feeler gauge. *Before making this adjustment, check the setting of oscillator core “II.” The rear of the core should be 1 from the mounting end of the coil form. This measurement is readily made by inserting a suitable plug in the mounting end of the coil form The core adjustment is made from the mounting end of the coil form with an insulated screw r1Vur iP1 l., e necessary to steady the core guide bar by applying a downward pressure at the antenna core end oi the bar while making these adjustments ) If this adjustment is necessary, first dissolve the glyptal seal on the core stud and be sure to reseal after making the adjustment. * L is the pointer adjustment screw on the end of the core guide baradjust so pointer reads 1100 KC. With the radio installed and the antenna plugged in, adjust the antenna trimmer “G” for maximum olume with the radio tuned to a weak station between 600 and 1000 KC (see sticker on case). 41 收音机爱 好者资料库 RadioFans.CN
