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This 13P1P vacuum tube is a direct replacement for the large (outer) tubes in the Dayton Audio HTA200 tube hybrid stereo amplifier. It acts as a shunt regulator and helps maintain a constant output voltage with a higher temperature coefficient and less noise than its solid-state equivalent.

Technical characteristics
| Specifications | |
|---|---|
| Product type | Tube |
| Number of pins | 7 |
| Filament heating voltage (Vf) | 13V |
| Filament heating current (If) | 750±80mA |
| Condition d'utilisation | |
|---|---|
| Anode voltage | 28V |
| Grid 2 voltage | 26V |
| Grid 1 voltage | 0V |
| Anode current | 42±10mA |
| Grid 2 current | ≤4mA |
| Output power | ≤220mW |
| Internal resistance | 1500 ohm |
| Slope | 7.5±1.5mA/V |
| Capacitance | |
|---|---|
| Input capacitance (Grid) | 15.5±2.5pF |
| Ouput capacitance (Anode) | 10.5±2.5pF |
| Transition capacitance (Grille-Anode) | ≤2.5pF |
| Max. values | |
|---|---|
| Maximum filament voltage | 14.3V |
| Minimum filament voltage | 11.7V |
| Maximum anode voltage | 110V |
| Grid 2 maximum voltage | 80V |
| Maximum anode power loss | 6W |
| Grid 2 maximum poxer loss | 1W |
| Max. voltage between cathode and filament | 100V |
| General | |
|---|---|
| Weight | 0.2g |
| Dimensions | 90 x 34 mm |
| Package | 1x Tube 13P1P |