EL504 (=6GB5A, 27GB5, 6P44S) Telefunken West Germany - nos tube

EL504 (=6GB5A, 27GB5, 6P44S) Telefunken West Germany - nos tube

Diamond bottoms. This valve is a triple mica type. Additional mica is placed between the upper mica and getter to reduce getter material contamination on the upper mica when the getter is made. This conductive contamination is sometimes the reason for the destruction of a power valve.

Key specifications

• Tube model: el504
• Base / socket: B9D (Magnoval (9-pin))
• Heater: 6.3 V / 1.38 A
• Max anode (plate) voltage (Va max): 550 V
• Max plate dissipation (Pa max): 16 W
• Max heater-cathode voltage (Vhk max): 200 V
• Max cathode current (Ik max): 250 mA

Links & datasheets

• Valve Museum / r-type exhibit
• 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.