Noblitt-Sparks-Industries-Inc-143800 电路原理图.pdf

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1、MOST-OFTEN-NEEDED 1959 RADIO SERVICING INFORMATION ARVIN Model 2581 Chassis 1.43800 ran 5 12 BE6 (7) *5 I2BA6 _ _ id),_ E3.L_Tf_.pr UlILIIP 7 I2AV6 gg 4 V, p I if J* 3 si/.ijr 11 ! I-1 Tn I -!T-rTr-J 7 50C5 i Jl_5 _ A -&EXTERNAL CON NECTIONS TO PRINTED BOARD. VOLTAGES MEASURED WITH A V.TV.M. R3 , 50

2、0K VOL CONT OSC. COIL BOTTOM VIEW 1_ TO VOL. CONTROL SHAFT RESISTANCE VALUES ARE IN OHMS Kl,000,MEGl.000.000. capacitance values less thanoiare in Microfarads ( * ?), AND VALUES OF(l) OR GREATER ARE IN MICROMICROFARADS (MMf),UNLESS OTHERWISE INDICATED. CIRCUIT POINT 1 2 3 _APPROXIMATE SENSITIVITIES_

3、 DUMMY I INPUT FOR 05 WATT OUTPUT! INPUT FOR-5 WATT OUTPUT TO GENERATOR (04 VOLTS ACROSS VC) (I 26 VOLTS ACROSS VC.) 455%cT 2000 uv 5000 uv 6 0 150 (I 26 VOLTS ACROSS VC.) 5000 UV 455 KC STANDARD LOOP AT 1000 KC 60 200UV/M ALIGNMENT PROCEDURE Output meter connection Across speaker voice coil Output

4、meter reading to indicate 500 milliwatts (standard output). . . 1. 26 volts Connection of generator ground lead.Floating ground Generator modulation.30% 400 cycles Position Frequency Generator Trimmers Adjusted Function of of Dummy Output in Order Shown for of Variable Generator Antenna_Connection_M

5、aximum Output Trimme Open 455 Kc .05 p fd Pin 7 12BE6 Al, A2, A3, A4 I.F. Open 1670 Kc * Test Loop A5 Oscillat 1400 1400 Kc * Test Loop A6 Antenna 1000 1000 Kc * Test Loop Fan ClA Plates 600 600 Kc * Test Loop Fan ClA Plates_ * Standard Hazeltine Test Loop Model 1150 or 3 turns of wire about 6 in dia meter placed about one foot from the set loop. of Trimmer I. F. Oscillator Antenna 13 收音机爱 好者资料库 RadioFans.CN