| Type | Substitutes | Base Diagram |
|---|---|---|
| 1B3GT | 1N2, 1G3, 1AU3, 1J3, 1K3, 1G3GT, 1G3-GTA, 1B3GT, 1J3A, 1K3-A, 1N2A |  |
| Web References | 1B3GT (RCA (HB3)) @ Franks Electron Tubes 1B3GT (Tung-Sol) @ Franks Electron Tubes 1B3GT (RCA (RC30)) @ Franks Electron Tubes 1B3GT @ RadioMuseum.org | |
| Bulb | T-9 |
| Base1 | B5-82 B5-85 Short Intermediate Shell Octal 5-Pin B6-8 Intermediate Shell Octal 6-Pin B6-60 Short Intermediate Shell Octal 6-Pin B7-47 Short Intermediate Shell Octal 7-Pin B7-166 Intermediate Shell Octal 7-Pin |
| Cap | C1-34 |
| Outline | 9-51 9-52 |
| Basing2 | 3C |
| Cathode | Coated Filament |
| Mounting Position | Any |
| Filament Voltage3 | 1.25 | Volts |
| Filament Current | 200 | Ma |
| Plate to Filament and Internal Shield | 1.3 | ��f |
| Inverse Plate Voltage Total DC & Peak (Absolute Value) | 26,000 | Volts |
| Inverse Plate Voltage DC | 21,000 | Volts |
| Peak Plate Current | 50 | Ma |
| Average Plate Current | 0.5 | Ma |
| Peak-Inverse Plate Voltage (Absolute Value) | 33,000 | Volts |
| Peak Plate Current | 30 | Ma |
| Average Plate Current | 1.0 | Ma |
| Minimum Frequency of Supply Voltage | 1.5 | Kc |
| Maximum Frequency of Supply Voltage | 100 | Kc |
| Tube Drop for Ib = 7 Ma (approx.) | 100 | Volts |
| 1 | On the 5-Pin bases, Pin 1 is omitted On the 5, 6 and 7-Pin bases JETEC B7-166, Pin 4 is Omitted On the 5, 6 and 7-Pin bases JETEC B7-47, Pin 6 is Omitted |
| 2 | Socket Terminals 1, 3, 4, 5, 6 and 8 may be connected to terminal 7 or to a corona shield which connects to terminal 7. Terminals 4 and 6 may be used as tie points for components at or near filament potential. |
| 3 | Under no circumstances should the filament voltage be less than 1.05 volts or more than 1.45 volts. |
| 4 | For operation in a 525-line, 30-frame system as described in "Standards of Good Engineering Practice for Television Broadcast Stations; Federal Communications Commission," the duty cycle of the voltage pulse must not exceed 15% of one scanning cycle. |
