Sensibly equivalent¶ to:
The CV2288 is a miniature audio output valve, commercially the DL66. It can produce the very small power of 2.5 mW and would need to be used with a high impedance headphone.
the grids can be seen through the holes in the anode. The red spot on the envelope denotes pin one which is the anode.
The thin glass tube envelope is 8 x 5 mm, and excluding the flying leads is 33 mm tall.
Reference: Datasheet. Type CV2288 was first introduced in 1951.
Absolute Maximum Operating Conditions¶
Updated October 12, 2013. shape:thin.glass.tube construction:all.glass type:pentode age:1950.1960 base: pin:1.a pin:2.g2 pin:3.f+ pin:4.g1 pin:5.f-.g3