AW: [sdiy] Using Tubes in SDIY

[Roy J. Tellason]

On Wednesday 29 December 2004 01:37 am, Glen wrote:

> I hope you are aware that the filaments in a 12AT7 are designed to work
> with 12 volts, and the filaments in the 6BC8 are designed to work with 6
> volts.

Actually the filaments in that tube (as well as a number of other ones nearby 
in the numbering,  like 12AU7, 12AX7, etc.) are all equipped with a 
center-tapped filament,  allowing operation with either voltage.