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               TABLE IV:   POWER-HANDLING ABILITY OF PENTODES

              Values of transconductance and screen-to-plate transconductance
                                      at half the rated plate dissipation

                                                                                                             .
 Tube          Gm1 (approx.)     Gm2 (approx.)            Rated Pp       Rated Pc2  .

6661                 6,000                  102                        3.0              0.5
6265                 5,000                  104                        2.0              0.5
5693                 2,400                  108                        2.0              0.3
6BH6                5,000                  110                        3.0              0.5
6BE6                2,500                  118                        1.0              1.0

6136                 6,000                  138                        3.0              0.65
6CS6                2,000                  160                        1.0              1.0
6AM8               8,000                  160                        2.8               0.5
6CB6               8,000                   172                        2.0               0.5
5915A              3,000                   175                       1.0               1.0

6137                3,000                   195                        3.3               0.4
5749                5,000                   200                        3.0               0.6
5840                6,080                   202                        1.1               0.55
5899                4,900                   204                        1.1               0.55
6AK5               7,000                   220                        1.7               0.5

5654                6,000                   220                        1.7               0.5
6BJ6               5,000                   230                         3.0              0.6
6AH6             13,300                   268                        3.2               0.4
6AZ8               6,000                   300                        2.0               0.5
6134              14,000                   312                        3.0               0.38

E-180-F         22,000                   380                        3.0               0.9
5686               3,750                   420                        7.5               3.0
12BY7           15,000                   431                        6.0               1.1
6V6                 5,000                  468                       12.0              2.0
6CM6              5,000                  480                       12.0              2.0

6AG7            11,000                   486                        9.0               1.5
6005                5,000                  500                      12.0               2.0
6CL6            12,500                   504                        7.5               1.7
5763             12,000                   552                      12.0               2.0
6L6                 8,000                  780                      19                  2.5

807                 9,800                  880                       25                 3.5
5902               6,000                  900                         3.7              0.4
6AR6              9,000                1,120                       19.0              3.2
5894A           10,500                1,200                       20                 7.0
6216             14,000                1,620                       10                 1.0

6BQ6GT       11,000                 1980                       11                  2.5
6Y6G            12,000                 2150                       12.5               1.75
6CD6GA       20,000                 3000                       15                  3.0
6DQ6A            9000                 3470                       15                  3.0
6DQ5            16,000                 5400                        2.4                3.2

    38.

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Copyright 2008 for Phyllis K. Pullen, M.D.,
by Robert J. Legg