| Year | Type EAK Köppelsdorf | Ref. | Tubes |
| 3/47 W | 2LN231 | AF7, AL4, AZ1 | |
| 3/48 GW | 2LN230 | UCH11, UCL11, UY11 | |
| 5/47 W II | 2LN229 | ACH1, AF3, ABC1, AL4, AZ11 | |
| 64/48 W | 2LN227 | ECH11, EBF11, ECL11, AZ1/11 | |
| 64/49 WKS | 2LN228 | ECH11, EBF11, ECL11, AZ1/11 | |
| 64/50 GWP | 2LNxx | UCH11, UBF11, UCL11 | |
| 64/50 GWS | 2LN226 | UCH11, UBF11, UCL11 | |
| 65/48 W | 2LN225 | ECH11, EF11, EBF11, EL11, AZ11 | |
| 65/49 | sch | ECH11, EBF11, EF11, EL11, AZ11/AZ1 | |
| 65/49 WKS + WKS II | 2LN224 | ECH11, EBF11, EF11, EL12, AZ11 | |
| 65/50 WKS II | 2LN219 | ACH1, AF3, ABC1, AL4, AZ1 | |
| 88/48 W | 2LN222 | EF13, ECH11, EF11, EBF11, EF11, EL12, EM11, AZ12 | |
| 912/50 W | 2LN220 | EF13, ECH11, EF11, EBF11, 3*EF11, 2*EL12, EM11, AZ12 | |
| Opal 6103 VEB EAK | sch | transistors |