Olympic Radio & Television, Inc. 571 Schematic

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Product Information:
Model:571
Manufacturer:Olympic Radio & Television, Inc.

Schematics Content:

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Page 1:

*Ii-E lure

ALIGNMENT PROCEDURE

Alignment procedure consists of four steps outlined in
the Alignment Procedure Chart.

For step No. 1, LF. alignment, connect the leads of a
test oscillator to the mixer grid and the common return
through an .01 mfd. caiacitor (dummy load). U on com-
pletion of this step, "roc " the variable condenser assure
that the I.F.'s have been aligned to the correct frequency.
Output should remain constant at any setting of the varl-
able condenser.

Steps 2 to 4 em
1150, or a reasona le substitute. Connect the test ' tor |
leads across this loop and place it ln a vertical position.
about two feet from the receiver loop.

IMPORTANT NOTICE; Make certain that each step is
done with a minimum input signal. .

ALIGNMENT CHART

STEP
CONNECT v TEST ADJUST
TEST OSC. OSC. POINTER FOR MAX.
T0 SETTlNG SETTING OUTPUT
1 Mixer Grid 455 KC 540 KC Trimmers
2 Standard* 1620 KC 1620 KC Trimmer E
Test Loop to 1620 KG
Test Loop Trimmer F
4 Standard* 600 KC 600 KC Variable
Test Loop Plates

NOTE: Hazeltine Standard Test Loop No. 1150 or a reason-
able substitute.

(C)John F. Rider

loy a Hazeltine Standard Test Loo Nov'

TRIMMER LOCATIONS

Electrical Rating

Line Voltage . . . .

Power Consumption
Tuning Frequency Range

Standard Broadcast . . . 540 t0 1620 KC
Intermediate Frequency

. . 110-120 volts, 50-60 cycle AC
..... 28 watts

Electrical Power Output
Maximum . . 1.75 watts

Loudspeaker I
e . . . Permanent Magnet
Outside Cone Diameter . . . 5"

Voice Coil Impedance . . . . . . 8.2 ohms at 400 cycles

Magnet Rating . . .

Page 2:

PAGE 17-4 PACK-BELL

PACKARD-BELL COMPANY .

REPLACEABLE PARTS LIST

Dummy Ante

D.C. Resistance Measurements

TUBE VOLTAGE CHART

(C)John F. Rider

Standard Output .
Volume Control . . . maximum

Ant. terminal to converter grid . .
Converter grid to 1st I.F. grid . . . 75X at 455 l\i<:.'>
1stl LF. grid to 2nd detector . 650K at 5 watts 400 cpsi

*NOTEz Measurements with A.C. V.T.V.M. AVG shorted;

PART PART
l NO. SYMBOL DESCRIPTION NO. SYMBOL DESCRIPTION
23522 C-l Capacitor, variable, 2 gang 73077 R-9 Resistor, 180 ohm, 1 w, 10%
C-11 54002 T-47 Lamp, dial
| 23009 C-4 Capacitor, .05 mfd. 400 V 89411 T-1 Transformer, output
23004 0-6 Capacitor. .005 mfd. soo V 180981; Bracket, Dial _ _
23001 C~7 Capacitor, .001 mfd. 600 V 21049 572 Cabinet. wood (specify finish)
0-12 V 20-25V 38079 571 Dial, paper
38080 572 Dial, paper
C-18 47001 572 Grille
0-14 _ 49004G 572 Handle, plastic (10% inch)
23018 C-15 Capacitor, 2 mfd. 200 V 49001F 572 Handle, plastic (9% inch)
290143 . L-1 Coil, 1st LF. 49002D 571 Handle, metal
29015B L-2 Coil, 2nd LF. 49008N 571 Handle, insert
29317 L-3 Coil, loo 52015B 572 Knob, ti" shank (specify col.)
29206 L-4 Coil, oscillator 52032 571 Knob, 34" shank (specify col.)
73041 R-2 Resistor, 22 K ohms, % w, 20% 55002 571 Crystal, dial
73055 R-B Resistor, 2.2 megohms, 'A w, 20% 55013 572 Crystal, dial
25014 R-4 Control, volume, 500 K 67021 Pointer, dial
73057 R-5 Resistor, 4.7 megohms, Mi w 20% 69013A Pulley, dial
73051 R-6 Resistor, 470 K, 55 w, 20% 79033 Socket, dial lamp v
78081 R-7 Resistor, 150 ohm, 1 w, 10% 83004 571 Speaker
'73022 R-S Resistor, 560 ohm, 'A w, 10% 83202 572 Speaker
MINIATURE TYPE GLASS TUBES SPECIAL SERVICE INFORMATION

*Stage Gain Measurements

Oscillator Cathode Voltages
117 AC line voltage
1620' KC . . . 2.0 volts A.C.*
1200 KC . . . 1.9 volts A.C.*
750 KC . . . 1.7 volts A.C.*
540 KC . . . 1.5 volts A.C.*

*NOTEz Measurements made with A.C. V.T.V.M. InputI
loading above 10 megohms.

- primary . . . o secon . . o ms
m IJF' 0"] . .oscillator coil
primary . . . . 21 ohms secondary . . . 21 ohms secondary . . . 6 ohms primary ..... 75 ohms
All D.C. voltages measured with a vacuum tube volt-
meter from socket contacts to ground buss. A.C. vol es
measured with a 1000 ohms per volt A.C. meter from soc et
contacts to ground buss. _
Volume control maximum, no signal, 117 volts A.C. line
voltage. All voltages shovm are positive D.C. unless other-
wise noted.

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