CT-3 COOL TUBE OWNER’S GUIDE CHANGING BATTERIES The CT-3 Is powered by 4 AA alkaline batteries located In the tuner/battery cartridge To replace the batteries, pinch the two cartridge tabs and pull out the cartridge. Replace the batteries carefully observing polarity. ma CONTROL Front Panel *COOL TUBE Lets you set tha amount of the guitar's pickup signal that ia applied bo the FTP-3's vacuum tube.
