VACUTRACE Vacuum Tube Curve Tracer
7
Pin # Signal
Description
1
PLATE
Plate (common to A and B)
2
3 IKA
Cathode
(A)
4 GRIDA Grid
(A)
5
+6H
Switched 6.3V heater power
6
5CT
5V heater center tap, connected to cathode
7
+5H
Switched 5V heater power
8
SCREEN
Screen (can be switched to plate, common to A and B)
9
10 IKB
Cathode
(B)
11 GRIDB Grid
(B)
12
-6H
6.3V heater return
13 GND
14
-5H
5V heater return
On the Duals card, both sockets use A and B circuits (use only one tube at a time).
On the Pentodes card, the left socket uses A, right B. Both sockets on the Power
card use the A circuit.
