B&K 667 issue

[dieseljeep]

Originally Posted by mbates14

Anyone have the schematic, or at least the tube socket wiring diagram for one of these?

Someone replaced Socket 6 in this one and of course when I stick a 12AU7 in there, it only lights half of it at twice the brightness. Yikes.

So in essence, I am sure it is wired wrong. but does someone have the proper schematic or wiring diagram?

Thanks.

Most tube checkers check the 12AU7 at 12 volts. It could be that the wiring going to pins 4 or 5 and 9 is reversed.
I'm not too familiar with the 667, as I have the 707 and a 747.
Look on the internet. There's information on the 707 but not sure about other models.