Type(s) | Production period | Tubes/transistors | Speed | Channels | C |
TB 72 | 196x | n/a | n/a | n/a | n/a |
TB 72B | 196x | n/a | n/a | n/a | n/a |
TB 74 | 196x | n/a | n/a | n/a | n/a |
TB 74B | 1964 | 1 x ECC82; 4 x ECC83; 2 x EL84; 2 x EAM86 | 1 7/8 3 3/4 7 1/2 |
n/a | n/a |