KT88
Power Tetrode
電力増幅用ビーム管
| Heater | Maximum Rating |
| Ef | If | Ebb | Eb | Pp |
Ec2 | Pg2 | Ik | Ehk |
| 6.3V | 1.6A | 800V | 600V | 35W |
600V | 6W | 230mA | 200V |
| | Tetrode | Triode | AB1 PP |
UL AB1 PP | (T)AB1 PP |
| Ebb (V) | - | - | 560 | 560 |
500 | 375 | 560 | 460 | 400 |
485 |
| Eb (V) * | 250 | 250 | 521 | 552 |
436 | 328 | 553 | 453 | 349 |
422 |
| Eg2 (V) | 250 | - | 300 | 300 |
- | - | - | - | - |
- |
| Ec1 (V) | -15 | -15 | - | -34 |
- | - | -75 | -59 | - |
- |
| Rk (ohm) | - | - | 230 | - |
300 | 200 | - | - | 262.5 |
262.5 |
| Rl (kohm) | - | - | 9 | 4.5 |
6 | 5 | 4.5 | 4 | 4 |
4 |
| Eg1 (V) | - | - | 21.2 | 23.7 |
36.8 | 25.1 | 49.5 | 40.3 | 27.6 |
40.3 |
| Ib0 (mA) | 140 | 143 | 128 | 120 |
174 | 174 | 100 | 100 | 152 |
188 |
| Ibsig (mA) | - | - | 146 | 290 |
198 | 192 | 314 | 280 | 160 |
202 |
| Ic20 (mA) | 3 | - | 3.4 | 3.4 |
- | - | - | - | - |
- |
| Ic2sig(mA) | - | - | 18 | 30 |
- | - | - | - | - |
- |
| gm (mA/V) | 11.5 | 12 | - | - |
- | - | - | - | - |
- |
| rp (kohm) | 12 | 0.67 | - | - |
- | - | - | - | - |
- |
| ug1g2 | 8 | 8 | - | - |
- | - | - | - | - |
- |
| Po (W) | - | - | 50 | 100 |
50 | 30 | 100 | 70 | 17 |
31 |
| KF (%) | - | - | 3 | 2.5 |
1.5 | 1 | 2 | 2 | 1.5 |
1.5 |
*: Eb は P-K 間の電圧
注: 電流、Rk は２本分の値。