| Size (overall dimensions) | 196.85 mm (7-3/4 in) high, 250.83 mm (9-7/8 in) wide, 292.10 mm (11-1/2 in) deep. |
| Weight | 13.62 kg (30 lb). |
| Ambient temperature range | 0 to +50 C. |
| Input requirements | 115 or 230 voltes, 50 to 400 Hz, 4 or 2 amperes. (Remove capacitor C1 when using a line frequency higher than 60 Hz.) |
| Heater power | 6.3 +/-0.3 volts ac. |
| Low -voltage B+ | 275 volts dc. Transmit NLT 250 volts dc; receive NMT 310 volts dc. |
| High-voltage B+ | 800 volts dc. TRansmit NLT 690 volts DC; receive NMT 970 volts dc. |
| Bias voltage | -55 to -80 volts, adjustable. |