All American Mohawk S-6 Schematic

All American Mohawk S-6

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Product Information:
Model:S-6
Manufacturer:All American Mohawk (Wurlitzer)(Lyric)

Schematic Pages

PNG: Page 1 Rider Manual Volume 1
PNG: Page 2 Rider Manual Volume 1

Schematics Content

Page 1:

Model S-6 Receiver

Peak Frequency = 175 KC.

Power Transformer Connections
1 - 110 volt Primary Start
2 - 110 volt Primary Finish
3 - Shield
4 - High Voltage Secondary Start
5 - High Voltage Secondary Tap
6 - High Voltage Secondary Finish
7 - 80 Filament Winding Start
8 - 80 Filament Winding Finish
9 - Heater Winding Start
10 - Heater Winding Finish
11 - No Connection

Page 2:

All-American Mohawk Corp.
Model S-6

Technical Data
Resistors: All carbon resistors used in these chassis are color coded in accordance with the R.M.A. code.

Resistance Color Capacity Tolerance Part No.
300 ohms Orange-black-brown 1/3 watt 10% 14-1773
2,000 ohms Red-black-red 1/3 watt 10% 14-1806
3,000 ohms Orange-black-red 1 watt 10% 14-1498
5,000 ohms Green-black-red 1/3 watt 10% 14-1600
6,000 ohms Blue-black-red 1/3 watt 10% 14-1502
10,000 ohms Brown-black-orange 1/3 watt 10% 14-1599
15,000 ohms Brown-green-orange 3 watt 10% 14-1745
30,000 ohms Orange-black-orange 1/3 watt 10% 14-1555
50,000 ohms Green-black-orange 1/3 watt 10% 14-1544
100,000 ohms Brown-black-yellow 1/3 watt 10% 14-1541
200,000 ohms Red-black-yellow 1/3 watt 10% 14-1730
300,000 ohms Orange-black-yellow 1/3 watt 10% 14-1556
500,000 ohms Green-black-yellow 1/3 watt 10% 14-1531

One-third watt resistors are approximately 3/4" long ax 1/4" diameter.
One watt resistors are approximately 1 3/4" long x 1/4" diameter.
Three watt resistors are approximately 1 3/4" long x 3/8" diameter.

Resistor Color Code
All resistors on LYRIC Model "S" receivers have their resistance value indicated by the RMA Color Code which is described below.
A = body color denotes first significant figure
B = end color denotes second significant figure
C = dot or band color denotes number of zeros following second significant figure

  • 0 - Black
  • 1 - Brown
  • 2 - Red
  • 3 - Orange
  • 4 - Yellow
  • 5 - Green
  • 6 - Blue
  • 7 - Violet
  • 8 - Grey
  • 9 - White

A few samples of this code are given below.

Body Color End Color Dot Color Resistance
Orange Black Yellow 300,000 ohms
Brown Green Orange 15,000 ohms
Violet Green Red 7,500 ohms
Orange Black Brown 300 ohms

Condensers:
Fixed mica condensers used in these receivers are color coded to indicate capacity.
Capacity:.0005 Mfd.
Color: Green, Black, Brown
Tolerance: 10%
Part Number: 14-1186
Paper bypass condensers used in these receivers are of the cub type and are plainly marked to show capacity in addition each unit carries a distinguishing color dot indicating the voltage rating as listed below.

Voltage Color
200 Green dot or label
400 Red dot or label
600 Yellow dot or label

Normal Working Voltages:
1. Line voltage 115 volts.
2. Volume control in full "ON" position
3. Antenna disconnected so that no signal is received.
4. Measurements made with 1000 ohm per volt meter.
5. Except where a minus sign preceeds the reading the NEGATIVE SIDE OF THE INSTRUMENT IS TO BE CONNECTED TO THE CHASSIS PAN.
6. Tested tubes are used.

In a normal receiver all voltages will be withing 5% of the values listed below:

Position of tube Type of tube Filament Voltage Cathode Voltage Plate Voltage Screen Voltage Grid Voltage
1st Det. 24 2.5 4.2 185 70 0
Oscillator. 27 2.5 0 70 0
I.F. Amp 51 or 35 2.5 1.8 195 70 0
2nd Det. 24 2.5 4.5 195** 70 0
Output. 47 2.5 225 245 (note) -17**

Speaker Field Current - 49 M.A.
Note - Screen of pentode is connected to cathode pin on socket.
** Owing to the high resistance of the circuit these voltages can be measured accurately only with an electrostatic voltmeter.