Order Detail N°479896 - 2024-10-28
Je les ai reçus le 11/04/2024 17.20
Merci.
This review has been posted for SOVTEK 12AX7WA / 7025 Twin Triode Tube (Unit) Je les ai reçus le 11/04/2024 17.20
Merci.
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Twin Triode Tube

This Sovtek 12AX7WA/7025 double triode tube with low gain and extremely low microphony is ideal for the replacement of a 12AX7/ECC83 tube, or in a DIY setup. This model is known for its musicality and the roundness of its reproduction.

| Specifications | |
|---|---|
| Product type | Tube |
| Tube type | Twin triode |
| Number of pins | 9 |
| Dimensions | Ø22.5 x 56.5mm |
| Electrical parameters | |||
|---|---|---|---|
| Parameter | Conditions | Min | Max |
| Heater current | Filament voltage : 6.3V | 300mA | 340mA |
| Filament voltage : 12.6V | 150mA | 170mA | |
| Grid reverse current | Filament voltage 6.3V ou 12.6V, plate voltage 250V, grid voltage minus 2V, grid circuit resistance 1MΩ | - | 0.2µA |
| Plate current | Filament voltage 6.3V ou 12.6V, plate voltage 250V, grid voltage minus 2V | 0.75mA | 2mA |
| First and second triodes plate current difference | Filament voltage 6.3V ou 12.6V, plate voltage 250V, grid voltage minus 2V | - | ±40% |
| Amplification factor | Filament voltage 6.3V ou 12.6V, plate voltage 250V, grid voltage minus 2V | 82 | 110 |
| Limit values | |||
|---|---|---|---|
| Parameter | Conditions | Min | Max |
| Filament voltage | Parallel connection | 6V | 6.6V |
| Series connection | 12V | 13.2V | |
| Plate voltage | - | - | 300V |
| Cathode - Heater votlage | - | - | ±200V |
| Cathode current | - | - | 10mA |
| Power dissipation at the plate of each triode | - | - | 1W |
| Grid circuit resistance for each of the triodes | Fixed bias | - | 1MΩ |
| Self bias | - | 2.2MΩ | |
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