Crosley-Corp-34BH 电路原理图.pdf

MANUAL OF 1941 MOST POPULAR SERVICE DIAGRAMS INSTRUCTIONS FOR MODEL 34 BH RADIO RECEIVER ALIGNMENT PROCEDURE Preliminary Output Meter Connections. Generator Ground Connection. Dummy Antenna to be in series with generator output. Position of Volume Control. Position of Tone Control. Position of Function Switch. Position of Mike Level Control. .Plate to Plate of 6K6s To chassis or Ground Lead .See Chart Below .Fully On .Treble or Speech .Radio .All the Way to Left (Off) Align ment Sequence Dummy Antenna Frequency Setting Input Connection to Receiver Band Switch Tuning Cond. Setting Trimmer Adjusted Remarks 1. .02 MF. 45S Kc. Grid of 6A8GT B. C. Fully open 2nd I-F (2) 1st I-F (2) Adjust for Maximum. Adjust for Maximum, 2. .0002 MF. 1650 Kc. Ant. Lead (Blue) B. C. Fully open B. C. “OSC” Trimmer Adjust for peak; gang does not have to tune thru signal. 3. .0002 MF. 600 Kc. Ant. Lead (Blue) B. C. Approx. 60 on dial B. C. “OSC” Series Trimmer Adjust for maximum output while rocking gang thru signal. 4. Repeat Step No. 2 to check possible shift due to series adjustment 5. .0002 MF. 1400 Kc. Ant. Lead (Blue) B. C. Approx. 140 on dial B. C. “ANT” Trimmer B. C. R-F” Trimmer Adjust for maximum output. Do not touch B. C. Osc. Trimmer. Adjust for maximum output while rocking gang thru signal. 6. 400 ohm (carbon) 5.3 Me. Ant. Lead (Blue) Police Fully open Pol “OSC” Adjust for peak; gang does not have to tune thru signal. 7. 400 ohm (carbon) 5.0 Me. Ant. Lead (Blue) Police Approx. 5.0 Pol “ANT” and R-F” Trimmers Adjust for maximum output while rocking gang thru signal. 8. 400 ohm (carbon) 18.3 Me. Ant. Lead (Blue) s. w. Fully open S. W. OSC Adjust for peak. Gang does not have to tune thru signal. 9. 400 ohm (carbon) 18.0 Me. Ant. Lead (Blue) s. w. Approx. 18 s. W. “ANT” and “R-F” Trimmers Adjust for maximum output while rocking gang thru signal. When aligning the shortwave bands “OSC” trimmers care must be exercised to see that the circuits are aligned on the correct frequency and not on the image which is approximately 910 kilocycles less as indicated on the dial. To check, increase generator output, tune-in the generator frequency and then tune-in the image frequency which should be weaker than the fundamental and come in approximately 910 kilocycles lower on the dial than the fundamental. If image cannot be tuned-in, the “OSC” trimmer is adjusted to the wrong peak. (Correct peak is the second peak on trimmer from the closed position). Repeat the original alignment procedure for more accurate adjustments. Always keep signal gen erator output as low as possible to prevent action of the A.V.C. circuit._ SOCKET VOLTAGES MEASURED 117.5 VOLTS LINE (BETWEEN SOCKET PIN AND CHASSIS) WITH 1000 OHM PER VOLT, 500 VOLT RANGE VOLTMETER (D. C.) SOCKET PIN NUMBER TUBE FUNCTION 1 2 3 4 5 6 7 8 6K7GTR-F Amp. 195 78.6 2.0 *6.3 2.0 6ASGT Osc.-Moil. 195 78.6 5.5 B.C. 2.6 S.W. 136 *6.3 1.0 6SK7I-F Amp. 78.6 *6.3 234 6SQ7Det. A.V.C. 1st A-F. 110 *6.3 4.5 6J5GTPhase Invert. 118 195 110 *6.3 6K6GTOutput . 220 228 *6.3 15.0 6K6GTOutput . 220 228 *6.3 15.0 6SK7 Mike Amp. *6.3 POS. 5Y3G Rectifier . 6E5Indicator . 305 D.C. *325 225 *325 *6.3 305 D.C. Measured with A.C. volt meter VOLTAGE DROP ACROSS SPEAKER FIELD= 77 VOLTS MAXIMUM POWER OUTPUT 130 V. Line=7.5 Watts POWER CONSUMPTION 117.5 V. Line=Radio 80 Watts, Phono Motor 35 WattsTOTAL=115 WATTS Voltages may vary 10% of values given. COMPILED BY M. N. BEITMAN, SUPREME PUBLICATIONS 收音机爱 好者资料库 RadioFans.CN MANUAL OF 1941 MOST POPULAR SERVICE DIAGRAMS ne-vNN3iN* 9v*ifl*aNnotiCM COMPILED BY M. N. BEITMAN. SUPREME PUBLICATIONS The Crosley Corporation fiodel 34 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN