Vacuum Tube - 12AD6 / 12AG6, Heptode
New-Old-Stock (NOS) tube
12AD6/12AG6 - Heptode
The 12AD6 is a miniature heptode primarily intended to perform the combined functions of mixer and oscillator in automobile radio receivers. The tube is specially designed to operate with plate and screen voltages supplied directly from a 12-volt storage battery.