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Tube 12AT7 / ECC81 / B739 Gold Pins
The high-end Genalex Gold Lion Gold Pins double triode tube unveils a wide sound stage, characterized by expressive midrange, deep and precise bass and generously developed treble. This re-release of the Genalex Gold Lion ECC81 / B739 faithfully recreates the sound signature of the original, considered the best 12AT7 tube ever designed.
The contacts of this tube are gold plated, allowing a very good conductivity and resistance to oxidation.
| Specifications | |
|---|---|
| Product type | Custom tube |
| Compatibility | 12AT7 ECC81 B739 |
| Grid reverse current | Not more than 0.5µA @ Heater voltage = 6.3V or 12.6V, Plate voltage = 250V, Grid voltage = -2V, Grid circuit resistance = 0.25M Ohm |
| Heater current | Not less than 330mA @ Plate voltage = 6.3V Not less than 165mA @ Heater voltage = 12.6V Not more than 360mA @ Plate voltage = 6.3V Not more than 180mA @ Heater voltage = 12.6V |
| Current plate | Not less than 7mA @ Heater voltage = 6.3V or 12.6V, Plate voltage = 250V, Grid voltage = -2V Not more than 13mA @ Heater voltage = 6.3V or 12.6V, Plate voltage = 250V, Grid voltage = -2V |
| Plate current at the beginning of the curve | Not more than 10µA @ Heater voltage = 6.3V or 12.6V, Plate voltage = 250V, Grid voltage = -12V |
| Transconductance | Not less than 4.5mA/V @ Heater voltage = 6.3V or 12.6V, Plate voltage = 250V, Grid voltage = -2V |
| Amplification factor | Not less than 50 @ Heater voltage = 6.3V or 12.6V, Plate voltage = 250V, Grid voltage = -2V |
| Limit values | |
|---|---|
| Heater voltage | Not less than 6V or 12V Not more than 6.6V or 13.2V |
| Plate voltage | Not more than 330V |
| Cathode to heater voltage | Positive : Not more than 200V Negative : Not more than 200V |
| Plate current | Not more than 18mA |
| Plate dissipation power of each triode | Not more than 3.25W |
| Each triode grid circuit resistance | Fixed bias : Not more than 0.25M Ohm Automatic bias : Not more than 1M Ohm |
| Max grid reverse current | Not more than 55V |
| Interelectrode capacitances | |
|---|---|
| Input capacitance of each triode | 2.5pF |
| Output capacitance of each triode | 0.4pF |
| Transfer capacitance of each triode | 1.6pF |
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