| Equivalent | 6046, KT32, VT201, VT201C, VR502, NR95, W3446 |
| Similar type | |
| With different Vf | 6L6, 35L6 |
| CV number | 25L6 = CV552 25L6G = CV551, CV1287, CV1502 25L6GT = CV553 |
| Swedish Mil.nr. | 25L6 = M2463-168 25L6GT = M2463-169 |
| Tektronix part no | 25L6GT = 154-0050-00 |
| Air Min. Ref. | 10E/312, 110E/3, 110E/252, 110E/468 |
