The 6GK6 is an output pentode designed for audio but also useful in other TV circuits. In single ended Class A and output of 5.7 Watts is possible with 10% distortion.
In push-pull Class AB a maximum of 17 watts is possible.
The RCA Logo. Looking through the notch at the top of the anode the grid wires can be seen. The sloping outer wire is the suppressor grid.
Made in USA.
Another example. Unbranded but with the grids clearly visible.
The control grid of this example is wound on copper rods.
The thin glass tube envelope is 21 mm in diameter and, excluding the B9A base pins, is 70 mm tall.
Reference: Data-sheet. Type 6GK6 was first introduced in 1968. See also1968 adverts.
