Carl, do you mean you want to adapt a tube phono preamplifier schematics to modern transistor active components? In general, tubes and transistors work on different principles, and in most cases it is easier to design a new transistor circuit than modifying an existing tube circuit. Even if you succeeded, a transistor circuit will sound different than the tube variant.
We need a bit more info ... as previous poster stated, most tube phono preamps are utilizing passive filters that incorporate the Rp of the driving tube so it is not as simple as replacing the gain stages with silicon. Doing so would alter the RIAA accuracy. There are several known good designs both discrete and op-amp based that it isn't worth the trouble of trying to re-use a tube phono stage and replace the amplification devices with solid-state.
- Status
- Not open for further replies.