These are very high quality tubes. They’re in fact on the same level as the Psvane 300B Z, at a much lower price. If you don’t need a lot of watts, they’re great.
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PSVANE's 2A3-Z power tube offers a warm sound, full and natural, with good balance and no background noise. PSVANE offers us a tube with a more pronounced analog texture than that of conventional tubes, with voices more prominent than usual and an overall sound evocative of vinyl's own texture.

Technical characteristics
| Specifications | |
|---|---|
| Product type | Power Tube |
| Tube type | Triode |
| Dimensions | 154mm x 62mm |
| ELECTRICAL CHARACTERISTICS | |
|---|---|
| Filament heating voltage | 2.5V |
| Filament heating current | 2.5A |
| Anode operating voltages | 250V |
| Grid control voltage | -45V |
| Plate current | 60mA |
| Mutual conductance | 5.25 mA/V |
| Control grid impedance | 800Ω |
| Amplification power | 4.2 |
| Power output | 3.5W |
| Limit Ratings | |
|---|---|
| Anode voltage | 300V |
| Anode power dissipation | 15W |
| Interelectrode capacitance | |
|---|---|
| Grid-anode capacitance | 12PF |
| Grid-filament capacitance | 6.8PF |
| Anode-filament capacitance | 3.2 PF |
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Jean-Louis G.