Crosley-Corp-106CP 电路原理图.pdf

收音机爱 好者资料库 RadioFans.CN MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS ALIGNMENT PROCEDURE MODEL 106CP Turn the tuning capacitor to the completely closed position against the stop, anl set the dial pointer to the reference line at the end of the dial scale. Set the tone control buttons all the way out. If the chassis is removed from the cabinet, connect the shorting har from the volume control (67A) tq the coupling capacitor (34) on the tone unit socket. Connect the output meter across the speaker output transformer connections on the 6K6 tubes. The r. f. signal input from the signal generator should be connected as indicated in the alignment chart. Connect the low side (ground) of the signal generator to the chassis. Turn the volume control on full and adjust the signal generator output to produce a noticeable output meter reading. Alignment adjustment locations are shown in Chassis- Top View, at bottom of page. Alignment Sequence Signal Generator Output Position of Adjust for Frequency In Series in kc. With To Band Switch Tuning Dial Maximum Output 455 200 mmf. Rear Gang Section American BC Fully Open 57 When aligning the short-wave oscillator trimmer (62C), he sure that the circuit is aligned at the correct frequency and not at the image frequency which is 910 kilocycles lower as indicated hy the receiving dial. To check: tune in the generator frequency, then increase the generator output and tune in the image frequency. The image frequency should he weaker than the fundamental and audible 910 kilocycles lower on the receiver dial. If the image cannot be tuned in, the oscillator trimmer is adjusted to the wrong peak; i. e., the oscillator trirnmer may be adjusted to the image or one of the harmonics instead of the fundamental frequency. The correct peak is the second one heard as the trimmer adjustment screw is opened from the completely closed position. B.C.R.F TRIMMER 60-A POLICE ANT. TRIMMER 60-1 OVERSEAS ANT. TRIMMER 6 VKRSEAS OSCILLATOR TRIMMER E OSCILLATOR TRIMMER ICAN B.C. OSCILLATOR TRIMMER 4SS KC 57 2NO I.F. TRANSFORMER The material presented on this page ha! been prepared byandis printed througt the courtesy of THE CROSLEY CORP SIGNAL WEB LOOP XT. GROUND EXT. ANTENNA- HIGH SIDE GROUND SPEAKER SOCKET 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN