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Values of transconductance and plate conductance at approximately
¾ rated dissipation, unless noted.
Tube gm (approx.) gp (approx.) Rated Dissipation (W)
12AX7 2,600 25 1.0
5751 2,000 27 1.0
6SL7GT 2,000 30 1.0
6112 2,500 39 0.55
5719 2,500 40 0.5512AY7 2,500 58 1.5
6072 2,800 58 1.5
12BZ7 7,500 60 1.5
6BY4 6,500 65 1.1
6679 8,500 105 2.86201 6,500 125 2.5
6AU8 6,500 141 2.5
6AM4 11,000 142 2.0
6BF7 5,300 150 1.0
6414 10,000 150 2.06135/5814A 3,500 177 2.75
6C4 - 12AU7 3,500 177 2.75
5670 6,200 184 1.5
6J6 6,200 184 1.5
5965 9,500 184 2.755492 3,000 185 1.75
5844 6,000 190 1.0
6021 6,500 192 0.7
6BQ7 8,500 200 2.0
6U8 8,500 203 2.76J5 4,500 220 2.5
6829 10,500 230 2.2
6BZ7 8,500 250 2.0
6BC8 8,500 250 2.0
5718 8,000 261 3.36111 6,000 266 1.1
6AZ8 5,500 280 2.5
6BH8 6,000 280 2.5
6386 6,000 300 2.5
12BH7 8,000 340 3.56463 6,000 350 4.0/7.0
5842 28,000 (half) 568 (half) 4.2
5687 12,500 613 4.2/7.5
6AH4 8,500 1,000 7.5
5998 10,000 4,000 13.06AS7G 12,000 (half) 5,500 (half) 13.0
6336 22,000 3,000 30
37.
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Copyright 2008 for Phyllis K. Pullen, M.D.,
by Robert J. Legg