| Tesla - 504 U-II (Pionır) |
| Produced | Tesla (Czechoslovakia) |
| Year of manufacture | 1949 |
| Frequency range | LW (968-2145 m), MW (187-588 m), SW (16.5-51 m). |
| Set of tubes | UCH21, UCH21, UBL21, UY1N |
| Dimensions | |
| Weight | 4,5 kg |
| Serial number | 442756 |
| Condition |  |
| Remarks | - |
| Fragments |
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