| BODY OVERALL HEIGHT | 1.965 INCHES NOMINAL |
| COMPONENT TYPE AND QUANTITY ACCOMMODATED | 2 CRYSTAL |
| CRYSTAL HOLDER DESIGNATOR | HC-6/U |
| HEATER ELEMENT OPERATING VOLTAGE RATING IN VOLTS AND TYPE | 6.3 AC NOMINAL |
| INCLOSURE TYPE | INCLOSED |
| MAINTAINED TEMP TOLERANCE RATING | -3.0 TO 3.0 CELSIUS |
| MAINTAINED OVEN CAVITY TEMP RATING | 55.0 CELSIUS |
| MAXIMUM WARM UP TIME IN MINUTES | 10.0 |
| OPERATING POWER DISSIPATING RATING IN WATTS | 8.0 |
| OVERALL DIAMETER | 1.000 INCHES MINIMUM AND 1.300 INCHES MAXIMUM |
| OVERALL HEIGHT | 2.160 INCHES MINIMUM AND 2.840 INCHES MAXIMUM |
| SPECIAL FEATURES | HC-6/U CRYSTAL HOLDERS MODIFIED TO ACCOMMODATE A SINGLE FOUR PIN MODULE |
| STYLE DESIGNATOR | OCTAL SOCKET |
| TERMINAL TYPE AND QUANTITY | 8 STANDARD TUBE BASE |