Old interstage transformer pinout (B, P, G, F?)

[rafafredd]

I have some old interstage transformer I want to use, and I used to know it, but now I am not so sure, as it's been some time I don't deal with these pinout labels.

They are usually marked as B, P, G and F pins for a SE plate to Single grid.

As far as I remember, B+ voltage goes to pin "B", and the tube plate goes to pin "P", am I right? I am not sure anymore.

And also, I don't have a clue about "G" and "F".

Is "G" for the grid, or ground?

And what the hell does "F" stands for?

I hope some old tube head sees this thread and help me, because I've searched with Google high and low, and I can't find an answer to that.

Thanks!

 

[Tom Bavis]

G: grid, F: filament, the grid return, At that time, directly heated triodes were cutting edge technology. And those transformers were a step-up, providing much of the circuit's gain. Best of them might exceed 5 KHz.

 

[rafafredd]

Oh, yes! Filament!

Thanks!

 

[directdriver]

F = Finish

Usually is ground.