Philips DAF 96 = 1 AH 5 diode-pentode vacuümbuis (B7G, 1,4V)

Battery-powered radio receivers need a detector and AF amplifier that can operate efficiently at low voltage. The Philips DAF 96 = 1 AH 5 is a directly heated diode pentode designed for exactly this task. Its 1.4 V heater draws only 25 mA, making it ideal for portable sets where power consumption is critical. The pentode section provides AF amplification, while the diode section handles detection, combining two functions in one miniature B7G envelope.

Who is it for

Radio restorers and hobbyists working on vintage battery valve radios will find this tube essential. It is also suitable for anyone building or repairing equipment that calls for a 1AH5 or CV1919 equivalent.

Main features

• Diode pentode construction for detection and AF amplification
• Directly heated cathode with 1.4 V / 25 mA heater
• Miniature 7-pin B7G base for compact designs
• Glass envelope with any mounting position
• Equivalent to 1AH5 and CV1919

Specifications

• Tube type: Diode Pentode
• Base: B7G (Miniature 7-pin)
• Heater voltage: 1.4 V
• Heater current: 25 mA
• Filament type: Directly heated
• Pentode anode voltage: 90 V (typical)
• Pentode screen grid voltage: 45 V (typical)
• Pentode anode current: 0.25 mA (typical)
• Pentode transconductance: 0.25 mA/V (typical)
• Diode anode voltage: 90 V (max)
• Diode anode current: 0.1 mA (max)
• Control grid voltage: -0.5 V (typical)
• Input capacitance: 3.5 pF
• Output capacitance: 3.5 pF
• Transfer capacitance: <0.005 pF
• Application: Detector, AF amplifier in battery radios
• Equivalent tubes: 1AH5, CV1919
• Envelope material: Glass
• Mounting position: Any

Tips

When replacing this tube, verify heater continuity and check for gas or shorts before installation. The B7G base is keyed to prevent incorrect insertion.