Do I need to replace my driver tube every time I replace my power tubes?

我每次更换后级电子管的时候是不是必须把前级管也一起换？

youdao

The output power is too low. Require to replace power tubes.

输出功率太低，请求更换功放管。

youdao

Please do check water supply and exhaust tubes. If necessary, replace them.

检查污水管及供水管，如有需要请更换。

youdao

Please do check water supply and exhaust tubes. If necessary, replace them.

检查污水管及供水管，如有需要请更换。

youdao