Blackstar Ht Dual Pedal Schematic Apr 2026

The 12AX7 requires a specific filament voltage (usually 6.3V or 12.6V). If your pedal isn't lighting up or passing signal, this is the first place to check for a blown component. ⚠️ A Critical Warning The HT-Dual is not a beginner project for DIY repair. Lethal Voltages: The internal 300V rail can be fatal.

If you are looking at a circuit diagram, focus on these areas: Blackstar Ht Dual Pedal Schematic

Both halves of the tube are utilized. One half typically handles the initial gain stage, while the second provides additional clipping and drive. The 12AX7 requires a specific filament voltage (usually 6