| Condition: | Output Power (4-ohm connection) |
Raw B+, volts | Reg. B+, volts | Screens, volts | Notes: |
| Idling | 0 | 762 | 447 | 330 | quiescent |
| Max. Class A | 27 | 752 | 445 | 328 | AB1 threshold |
| Max. Class AB1 | 110 | 730 | 442 | 303 | Vg<=0v |
| Class AB2 | 196 | 715 | 441 | 293 | no clipping |
| Max. Class AB2 | 228 | 710 | 440 | 290 | soft clipping |
| Full-out | 320 | 692 | 439 | 287 | hard clipping |
| Condition: | Output Power (not limited) |
Output Power (limited) |
Limiting (dB) | Notes: |
| 1 dB point: | 2w | 2w | -1 | minimum perceptible change |
| 3 dB point: | 25w | 12.5w | -3 | mild brightening |
| breakpoint: | 196w | 64w | -4.9 | warm distortion |
| max. limit: | --- | 220w | -9 | onset of clipping |
| Parameter: | Value: | Notes: |
| Maximum compression | 25 dB | maximum usable |
| Attack time constant | 15 mSec. | full settling in 50 mSec. |
| Decay time constant | 0.6 Sec. | full recovery in 3 Sec. |
| Condition: | Value: |
| All gains at max., compressor and limiter off | 7 millivolts RMS for full output |
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