The ARC VT 200 is not user friendly when it comes time to replace the small signal tubes. They have to be biased. Its not for the novice.
https://forum.audiogon.com/discussions/please-give-me-advice-about-an-arc-vt-200-amp
https://forum.audiogon.com/discussions/please-give-me-advice-about-an-arc-vt-200-amp