The fluorescent target is U-shaped and the anode is connected to a centered rod giving one shadow with varying angle depending upon the control voltage. Mainly used as a tuning indicator.
| Equivalent | 6DH7, 6DU6 |
| Similar type | |
| With different Vf | HM85 = 12DH7 UM85 = 19DH7 |
| CV number | |
| Swedish Mil.nr. |
