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         Tesla Signal  | 
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| Year of manufacture: | 1947/48 | 
| Manufacturer: | Rel Electrum Brno, later nationalised as Tesla | 
| Tubes used: | 2x ECH21, EBL21, EM11, AZ11 or 2x ECH4, EBL1, EM4, AZ11 | 
| Wave bands: | long wave, medium wave, short wave 13,5 - 32 m and 28 - 62 m | 
| Description: | 
       This superheterodyne belonged to the middle class of radios on the market. Various types of tubes were used. The chassis was also used in many types of audio distribution systems.  |