Sensibly equivalent¶ to:
The EL506 is an audio output pentode. In single ended use the typical output would be 10 Watts at 13% total distortion.
Push pull pairs were used in 30 Watt amplifiers and the electrode dimensions suggest a 25 to 30 Watt anode dissipation. The VA-12 amplifer designed by Thorn-AEI is described in the attached PDF file.
The circuit of the VA-12 amplifier from 1967. The VA-12 was designed for both HI-FI and Guitar use. Thanks to Terry Bateman for sending the Application report No. L.96 as PDF.
The wide glass tube envelope is 27 mm in diameter and, excluding the B9D base pins, is 68 mm tall. Thanks to John Rumens for donating this valve.
Reference: 1040. Type EL506 was first introduced in 1966.
Absolute Maximum Operating Conditions¶
PDF scanned from an original document held by the museum
Updated August 13, 2013. shape:wide.glass.tube construction:all.glass type:pentode age:1960.1975 base:b9d heater:6.3v pins:9 pin:1.g2 pin:2.g1 pin:3.k.g3 pin:4.h pin:5.h pin:6.g1 pin:7.g2 pin:8.ic pin:9.a