Boss · Tuner
TU-3 Chromatic Tuner
9V · 85 mA · maker
Boss TU-3 Chromatic Tuner power requirements
9V DC · polarity not stated · draws 85mA
digital · also runs on a 9V battery · from the maker
“DC 9 V: Dry battery 6F22 (9 V) type (carbon), Dry battery 6LR61 (9 V) type (alkaline), AC Adaptor (PSA series: optional) … Current Draw 30 mA (DC 9 V) 85 mA (DC 9 V, when High Brightness mode is on)” source
Checked 2026-10-13
Size
73 × 129 × 59 mm (2.87 × 5.08 × 2.32 in)
Width × depth × height, from the manufacturer.
Power supplies that can run it
Each has an output that can power it, checked against its published figure. Plan the whole board to see what runs everything.
- Walrus Audio Canvas Power 1515 outputs · isolatedSweetwater
- Voodoo Lab Pedal Power 3 Plus12 outputs · isolatedSweetwater
- Truetone 1 SPOT Pro CS1212 outputs · isolatedSweetwater
- MXR M238 ISO-Brick10 outputs · isolatedSweetwater
- Strymon Zuma9 outputs · isolatedSweetwater
- Voodoo Lab Pedal Power 38 outputs · isolatedSweetwater