Sonora-Radio-and-Telev-Corp-WAU-244 电路原理图.pdf

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1、I2SK7 I2SA7 3SLBCT DIA PART NO. NO. R| N-4023 R2 N-402t 9 N-I2B2 R4 N-4003 R5 N-2087 RR N-4020 r7 N-4028 Re N-4007 R N-4027 Rio N-3355 R| N-4022 R|2 N-4023 R|3 N-4023 cl N-I34S c2 N-1343 C N-0013 C4 N-4094 cs N-eias IdiaJ part I NO. NO. .01 MPO 400V 20% .02 MPO 400 V 20* 40 MPO 130V ELECT RO 40 MPO

2、150V LYTIC JO3 MFD 4O0V 20% .1 MFO 200V 20% .05 MFO 200V 20% 22t000 OHM .3W 20% Cft N-1344 .01 MPO 400V 20% 220,000 OHM .3W 20% Cj N-1378 I .02 MPO 400V 20* L MEGOHM .3W 20%CV /40MF0 150V ELECTRO _ N-5051 1 47,000 OHM .5W 20 * C9J 40 MPO 150V LYTIC .5MEG VOLUME CONTROL C|0 N-1370 .05 MFO 4O0V 20% GO

3、 MEGOHM .SW 20% CH * MFO 200V 20% 220,000 OHM .SW 20% Ca N-Weft .05 MFO 200V 20% ISO OHM .5W 10% 470.000 OHM .3W 20% I N-6ie3 LOOP COIL 1,000 OHM I.W IO% 2 N-6192 2 GANG CONOENSER 33 OHM .3W 20% a N-4045 05C. COIL 82 OHM 2. W IO% 4 N-4613 1ST I.P. TRANSFORMER 58,000 OHM ,5W 10% 5 N-4840 2N0I.F TRANS

4、FORMER 8 N-4985 TRIMMER .05 MFO 200V 20% 7 N-8I8I OUTPUT TRANSFORMER .03 MPO 20OV 20% 8 N-8187 3 SPEAKER I00MMF0 500 V 20% .005 MFO 800V -15* 40% 250 MMFD 500V 20% ALL VOLTAGES SHOWN ARE MEASUREO PROM TERMINAL TO BUSS. LINE VOLTAGE 117 A.C. SWITCH ON J VOL.CONT* GENERAL DATA. The alignment of this r

5、eceiver requires the use of a test oscillator that will cover the frequencies of 455, 600, 1400 and 1720 KC and an output meter to be connected across the primary or secondary of the output transformer. If possible, all alignments should be made with the volume control on maximum and the test oscill

6、ator output as low as possible to prevent the AVC from operating and giving false readinas CORRECT ALIGNMENT PROCEDURE. The intermediate frequency (I.F.) stages should be aligned properly as the first step. After the I.F. transformers have been properly adjusted and peaked, the broadcast band should

7、 be adjusted. I.F. ALIGNMENT. Remove the chassis and loop antenna from the cabinet and set Ihem up on the bench so that they occupy exactly the same respective positions on the bench as they did in the cabinet. Care should be taken to have no iron or other metal near the loop. Do not make this set-u

8、p on a metal bench. With the gang SONORA RADIO Models VIA-243, -244 WAU-243, -244 5M3) condenser set at minimum, adjust the test oscillator to 455 KC and connect the output to the grid of the first detector tube (12SA7) through a .05 or .1 mfd. condenser. The ground on the test oscillator should be

9、connected to the ground buss. Indicated on the circuit diagram. Align all three I.F. trimmers to peak or maximum reading on the output meter. BROADCAST BAND ALIGNMENT. Connect the test oscillator to the antenna of the set through a 100 mmld. (.0001) condenser. With the gang condenser set at minimum

10、capacity, set the test oscillator at 1720 KC, and adjust the oscillator (or 1720 KC trimmer) on gang condenser. Nextset the test oscillator at 1400 KC, and tune In the signal on the gang condenser. Adjust the antenna trimmer (or 1400 KC trimmer) for maximum signal. Next set the test oscillator at 600 KC, and tune in signal on condenser to check alignment of coils. 收音机爱 好者资料库 RadioFans.CN