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TUNG-SOL 12AT7 Tubes Triodes (Matched Pair)
These Tung-Sol 12AT7 triode tubes feature a beautiful design, using quality materials. They have improved dissipation and are ideal for power or reverb systems. They are also an excellent replacement for the ECC81 tubes. These 12AT7 tubes come in pairs and are matched to ensure the best performance.
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Tung-Sol 12AT7
Tubes Triodes (Matched Pair)
These Tung-Sol 12AT7 triode tubes feature a beautiful design, using quality materials. They have improved dissipation and are ideal for power or reverb systems. They are also an excellent replacement for the ECC81 tubes. These 12AT7 tubes come in pairs and are matched to ensure the best performance.
| # Pin | Electrode name |
| 1 | Second triode plate |
| 2 | Second triode grid |
| 3 | Second triode cathode |
| 4, 5, 9 | Heater |
| 6 | First triode plate |
| 7 | First triode grid |
| 8 | First triode cathode |
Technical characteristics
| Specifications | |
|---|---|
| Product type | Tubes |
| Tubes type | Triode |
| Number of pins | 9 |
| Quantity | Sold by pair |
| Measurements | |||
|---|---|---|---|
| Parameter | Conditions | Min. | Max. |
| Heater current | Filament voltage 6.3V | 340mA | 370mA |
| Heater current | Filament voltage 12.6V | 170mA | 185mA |
| Grid back current | Filament voltage 6.3V or 12.6V, plate voltage 250V, grid voltage minus 2V, grid circuit resistance 0.25MΩ | - | 0.5µA |
| Plate curent | Filament voltage 6.3V or 12.6V, plate voltage 250V, grid voltage minus 2V | 7mA | 16mA |
| First and second triodes plate current difference | Filament voltage 6.3V or 12.6V, plate voltage 250V, grid voltage minus 2V | - | ±25% |
| Amplification factor | Filament voltage 6.3V or 12.6V, plate voltage 250V, grid voltage minus 2V | 45 | - |
| Cathode - Heater insulation resistance | Filament voltage 6.3V or 12.6V, plate voltage 250V, grid voltage minus 12V | - | 60µA |
| Limit values | ||
|---|---|---|
| Parameter | Min. | Max. |
| Filament voltage (parallel) | 6V | 6.6V |
| Filament voltage (series) | 12V | 13.2V |
| Plate voltage | - | 330V |
| Cathode - heater voltage | - | ± 200 |
| Cathode current | - | 18mA |
| Power dissipation at the plate of each triode | - | 3.25W |
| Grid circuit resistance for each triode, fixed bias | - | 0.25MΩ |
| Grid circuit resistance for each triode, self bias | - | 1MΩ |
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