Heathkit TC3 Supplemental chart
Tube Type Fil. Plate Top Bottom Comment
             
1R5 1 1.4 26 BCDF AE  
1 1.4 85 BCF AE
1S5 1 1.4 31 DEF CG 1AH5
1 1.4 53 C G
1T4 1 1.4 26 BCF AE 1AF4
3S4 2 1.4 30 BCDF AG 3A4
6A8 2 6.3 34 EF GH 6D8
2 6.3 42 CDK GH
6C5 2 6.3 28 CE GH 6J5
6F5 1 6.3 24 DK GH  
6F6 3 6.3 30 CDE AGH 6V6
6K7 2 6.3 28 CDEK GH 6W7/6D6
6L5 2 6.3 28 CE GH 6C5
6P5 2 6.3 28 CE GH 6J5
6S7 2 6.3 27 CDEK GH 6K7
6SA7 2 6.3 38 ACH FG 12SY7
2 6.3 26 DE FG
6SG7 2 6.3 23 DFH CEG 6AB7
6SK7 3 6.3 28 DFH CEG 6SJ7/7A7
6SS7 3 6.3 28 DFH CEG 6SK7
12BA7 3 12.6 18 AB CEFGJ 6BA7
1 12.6 36 AFGJ BCE
12SA7 2 12.6 38 ACH FG 12SY7
2 12.6 26 DE FG
12SG7 2 12.6 23 DFH CEG 6AB7
12SJ7 2 12.6 27 DFH CEG 6SJ7
12SK7 3 12.6 28 DFH CEG 6SJ7/7A7
12SQ7 1 12.6 20 BF CG 6SQ7
1 12.6 40 D CG
1 12.6 40 E CG
35B5 3 32 24 AEFG BC 35C5
35Y4 3 32 20 B GH 35W4
35Z5 3 32 20 E BCH 40Z5
50A5 3 50 21 BCF GH 50L6
50B5 3 50 22 AEFG BC 50C5
UBL21 3 50 21 BCD EFGH  
2 50 42 E BCDFGH
2 50 42 F BCDEGH
UCH21 2 19.6 28 BEFG CDHK Connect grid cap lead to center tab of tube socket
2 19.6 28 CD BEFGHK
UY1N 3 50 20 C EGH Test developed on used tube
WD-11 2 1.4 45 BC D Insert adapter with locating pin at top

Note: When the Comment column refers to a tube, it usually means that the tester settings are based in some way on Heathkit's setting for that tube.