12B4A Sylvania USA - nos tube

12B4A Sylvania USA - nos tube

Beautiful Power Triode. Good power tube for OTL headphone amps. It is also a good driver.

Key specifications

• Tube model: 12b4a
• Base / socket: B9A (Noval (9-pin))
• Heater: 12.6;6.3 V / 0.3;0.6 A
• Max anode (plate) voltage (Va max): 550 V
• Max plate dissipation (Pa max): 5.5 W
• Max cathode current (Ik max): 30 mA

Links & datasheets

• Valve Museum / r-type exhibit
• Radiomuseum tube page
• R-type PDF datasheet

Technical data and equivalence information are compiled from public sources and may contain errors. Always verify suitability and ratings from original manufacturer datasheets before use.

NOS tubes are stored in our external warehouse. Most NOS tubes are therefore not available for immediate pickup from our physical shops. Please allow an additional 2–5 business days for delivery.