Galvin-Mfg-Co（Motorola）-67L11 电路原理图.pdf

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1、TRIMMERS ON GANG. RESISTORS ARE INDICATED IN OHMS. JNE THOUSAND OOOO) OHMS. GROUND TO CHASSIS .GROUND TO COMMON NEGATIVE. II 5 CHASSIS HS-59 MODEL 67L11 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1948 MOST-OFTEN-NEEDED RADIO DIAGRAMS MOTOROLA INC. Model 67L11, Chassis HS-59 Schematic on page 109. Normally, a

2、lignment can be made with trimmers 5, 6 and 7. However, If range of these trimmers Is Insufficient to obtain peak, adjustment can be made with trimmers 5A, 6A and 7A. R.F. COIL. The Inductance of this coll Is set at time of manufacture by adjusting the Iron core. No resetting of this core should be

3、made unless It has been tampered with. If so, readjustment can be made by proceeding as follows: Tune in 600 Kc signal and peak Padder AdJ. (8). Next tune In 1400 Kc signal and peak trimmer (6). Repeat both adjustments until maximum response Is obtained at both ends; the last adjustment should be tr

4、immer (6). STEP DIAL SET TO DUMMY SIGNAL GENERATOR CONNECTED TO SIGNAL GENERATOR SET TO ADJUST TRIMMER OR CORE REMARKS IF AL 1. GNMENT Gang fully opened. 1 mf OSC-MOD grid* 455 KC 1,2,3 & 4 Adjust for maxi mum output RF AL 2. GNMENT 1600 KC* - Radiation loop* 1600 KC 5 This sets osc. to dial scale.

5、1 1400 Kc Radiation loop* 1400 KC 6 & 7 Tune signal for max. with re ceiver tuning knob, then peak trimmers 6 & 7. 4. 1400 Kc Radiation loop* 1400 KC 7 With chassis assembled Into cabinet, re peak antenna trimmer. * * A convenient point is the stator of the tuning capacitor. Close gang fully and set

6、 pointer to calibration mark at left hand side of dial background, then set to 1600 Kc by setting pointer at right hand calibration mark. Connect output of signal generator to a s diameter, 3 turn loop and bring loop close enough to receiver loop to obtain output of so milliwatts (,40V) on output meter. Vary distance between loops to maintain this output during alignment. Minimum distance between loops should never be less than 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN