6V6 Tube Pinout

Pin
---
1 - NC (no connection)
2 - Heater
3 - Plate
4 - Screen Grid
5 - Control Grid

7 - Heater
8 - Cathode (suppressor grid)

5Y3GT Tube Pinout

Pin
---
1 - [NC]
2 - [F] filament (cathode?)
4 - [p] plate (anode)
6 - [p] plate (anode)
8 - [F] filament (cathode?)

Notes >
A. pins two and eight receive 5 voltsAC/2 amperes
B. pins four and six receive 350 voltsAC/

12AX7 Tube Pinout

Pin
1 - "Pt2" Plate two
2 - "Gt2" Grid two
3 - "Kt2" Cathode two
4 - "Ht2" Heater two
5 - "Ht1" Heater one
6 - "Pt1" Plate one
7 - "Gt1" Grid one
8 - "Kt1" Cathode one
9 - "HM" Heater Tap