| Standard ID | SJ 1023-1976 (SJ1023-1976) |
| Description (Translated English) | Electronic tubes, Type FU-81 |
| Sector / Industry | Electronics Industry Standard |
| Classification of Chinese Standard | L36 |
| Word Count Estimation | 12,147 |
| Date of Issue | 1976/2/18 |
| Date of Implementation | 1976/10/1 |
| Adopted Standard | ��������, NEQ |
| Regulation (derived from) | Industry-Science (2010) No. 77 |
| Summary | This standard applies to FU-81 type bulb emitting power pentode (hereinafter referred to as the tube). The tube has a direct thermal thorium tungsten carbide cathode cooling method for natural cooling or forced air cooling. Suitable for radio equipment for use in power amplification or oscillation frequency is not greater than 50MHz. |