All American Mohawk S-6
Model: | S-6 |
Manufacturer: | All American Mohawk (Wurlitzer)(Lyric) |
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.