Octal Socket (Int.Octal, IO) K8A, USA 1935 Filament Vf 6 Volt / If 0.3 Ampere Description The Octal TwinDiode-Pentode (K8A) 6BN8GT has nothing to do with the Noval TwinDiode-Triode 6BN8

The dual diode-pentode type electron tube, identical to the 6BN8GT, is often designated as the 6GH8A. This type of tube contains two diode sections and one pentode section within the same enclosure. The diode sections can be used for rectification functions, while the pentode section is used for signal amplification. The 6GH8A (or 6BN8GT) was used in several applications and its presence is common in many electronic circuits of the era in which it was manufactured. Its double diode-pentode configuration makes it versatile and suitable for amplifying and managing signals flexibly. If you have additional questions or need more specific information, don't hesitate to ask. It will be a pleasure to provide you with further details.