Newb B9A question

[JammyBStard]

Is this diagram as you look at the pins on the tube or the holes on the tube holder?

 

[Arnulf]

Pins (this is view from below the socket upwards).

UIf unsure, trace the thick heater wires (most often these are pins 4 & 5 in case of noval tubes although this isn't always the case).

 

[JammyBStard]

cheers!

 

[Brit01]

I've got that mixed up more than once I can tell you!

Luckily no damage done so far.