Copland CTA 301 Mk II original tube manufacture

Does anyone know the tube manufacturer that Copland used in making the Copland CTA 301 Mk II preamp? I would think the best replacement tube (at least to start with) would be the one the unit was designed for.

Not necessary true.

You can tube roll the CTA 301 with any tubes that are comparable with the original ones.

Give Copland distributor (Divergent Technologies) a buzz for more information, tel 519 749 1565