TIG Parts List
| Componen | Description | Function | Part spec | Comment | Source | |
| Motor | 240v 5 hp reverseable | Energy Source | 240v 5 hp reverseable | Harbor Freight | $ 80.00 | |
| Drive Pulley | 6" A belt pulley | Energy Source | 6" 5/8" arbor A belt pulley | Ace Hardware | $ 9.00 | |
| S2 | Motor Control Switch | Energy Source | 240v 20A Breaker with box | discarded box, kept breaker mounting bracket | Home Depot | |
| Alternator | High output truck Alternator | Energy Source | Leece Neville 8LHA 160A 12V | Disabled Internal regulator | eBay | $ 86.00 |
| Pulley | 3.5" A/B Belt Pulley | Energy Source | 3.5" 7/8" arbor pulley | Mail Order | $ 11.00 | |
| Belt | 32" A belt | Energy Source | 32" A Belt | Ace Hardware | $ 5.00 | |
| T1 | Excitation Source | Power Supply | 240V/24V 300VA | eBay | $ 17.00 | |
| Dx | Rectifer | Power Supply | 25A 50V Full wave Diode Bridge | Radio Shack | $ 3.29 | |
| C1 | Filter | Power Supply | 4700uF 35V | Radio Shack | $ 5.29 | |
| C2 | Filter | Power Supply | 4700uF 35V | Radio Shack | $ 5.29 | |
| IC1 | Voltage Regulator | Power Supply | LM7812 12V 500mA | with heatsink | Radio Shack | $ 1.59 |
| Fan | Output Transistor Cooling | Output | 12v PC Heat Sink with Fan | Old AMD PC | ||
| IC2 | Quad Analog OP amp | Various | LM324N | Radio Shack | $ 1.49 | |
| Shunt | Alternator Output Current Sensing | Current Sensing | 150A/50mV Shunt | eBay | $ 16.00 | |
| R17 | Current Amp Resistor | Current Sensing | 1k 0.25W | Radio Shack | $ 0.20 | |
| R18 | Current Amp Feedback | Current Sensing | 240k 0.25W | 240x multiplier | Radio Shack | $ 0.20 |
| R19 | Current Amp Resistor | Current Sensing | 10k 0.25W | Radio Shack | $ 0.20 | |
| R15 | Voltage Sensing Resistor | Voltage Limiter | 47k 0.25W | Radio Shack | $ 0.20 | |
| R16 | Voltage Sensing Resistor | Voltage Limiter | 4.7k 0.25W | Radio Shack | $ 0.20 | |
| R2 | Max Voltage setter | Voltage Limiter | 10k 0.1W Trimmer | Radio Shack | $ 1.29 | |
| R9 | Voltage Limiter Feedback | Voltage Limiter | 10k 0.25W | Radio Shack | $ 0.20 | |
| R6 | Voltage Limiter Output | Voltage Limiter | 20k 0.25W | Radio Shack | $ 0.20 | |
| C7 | Voltage Limiter Output filter | Voltage Limiter | 1uF 35V | Radio Shack | $ 1.59 | |
| R10 | Voltage Limiter Transistor Bias | Voltage Limiter | 22k 0.25W | Radio Shack | $ 0.20 | |
| Q3 | Voltage Limiter Transistor | Voltage Limiter | TIP3055 NPN 15A 90W | Radio Shack | $ 1.79 | |
| C8 | Current Limiter Feedback | Current Limiter | .01uF 35V | Radio Shack | ||
| R12 | Current Limiter Output | Current Limiter | 2k 0.25W | Radio Shack | $ 0.20 | |
| R11 | Current Limiter Transistor Bias | Current Limiter | 100k 0.25W | Radio Shack | $ 0.20 | |
| Q1 | Current Limiter Transistor | Current Limiter | TIP3055 NPN 15A 90W | with heatsink | Radio Shack | $ 1.79 |
| Q3 | Output Transistor | Output | 2N5684 PNP 50A 300W | Mounting on PC Heatsink with Fan | eBay | $ 3.00 |
| D2 | Output Transistor Protection | Output | 6A 50V Diode | Radio Shack | $ 0.62 | |
| D3 | Output Transistor Protection | Output | 6A 50V Diode | Radio Shack | $ 0.62 | |
| R13 | Output Transistor Bias | Output | 1k 0.25W | Radio Shack | $ 0.20 | |
| R14 | Output Minimum Voltage setter | Output | 47k 0.1W Trimmer | Radio Shack | ||
| IFIELD | Output Current LED | Output | Green LED | Radio Shack | $ 1.39 | |
| R7 | Arc Detect Setter | Gas Valve | 10k 0.25W | Radio Shack | $ 0.20 | |
| R8 | Arc Detect Setter | Gas Valve | 1k 0.75W 15-turn Trimmer | Radio Shack | $ 2.59 | |
| R20 | Arc Detect LED | Gas Valve | 1k 0.25W | Radio Shack | $ 0.20 | |
| ARC | Arc Detect LED | Gas Valve | Red LED | Radio Shack | $ 1.29 | |
| R5 | Arc Detect Output | Gas Valve | 10k 0.25W | Radio Shack | $ 0.20 | |
| Q4 | Gas Valve Control | Gas Valve | 2N3904 NPN 600mW TO-92 | Radio Shack | $ 0.17 | |
| R4 | Gas Valve Control | Gas Valve | 10k 0.25W | Radio Shack | $ 0.20 | |
| C3 | Gas Valve Control | Gas Valve | 10uF 35V | Radio Shack | $ 0.99 | |
| D1 | Gas Valve Control | Gas Valve | Switching Diode | Radio Shack | $ 0.05 | |
| IC3 | Gas Valve Timer | Gas Valve | LM555 timer IC | Radio Shack | $ 1.49 | |
| C5 | Gas Valve Timer Cap | Gas Valve | 47uF 35V | Radio Shack | $ 1.19 | |
| R3 | Gas Valve Timer Resistor | Gas Valve | 470k 0.1W Trimmer | Suggested to control turn off time, 20 sec max | Radio Shack | |
| R21 | Gas Valve LED Indicator | Gas Valve | 1k 0.25W | Radio Shack |