Variac Power regulator

[dariez75]

Hi guys, I want build a Variac in order to achieve good distortion at low level volume in my new future build JMP 50. I've try to send an e-mail to Hall amplification but no answer come back. Is there someone could help me to diy variac build. Many thanks

[xtian]

Do you mean DC power scaling? If Hall is unresponsive, try London Power.

A variac is for scaling AC mains voltage. Maybe you knew that already.