The new Sencore Mighty Mite VI represents a unique breakthrough in tube testers. The Mighty Mite VI is completely solid state using the FET in a balanced bridge for an instant on checker. This new outstanding feature means that no time is wasted waiting for the checker to warm up and stabilize before accurate testing can begin. The new Mighty Mite is ready as soon as it is turned on. A full load cathode current check, high sensitivity grid leakage check, and the famous Sencore Stethoscopic shorts test make this the ideal checker for service work and the man on the go. Check the features of the Mighty Mite below: * Full load cathode current check to pick out the weak tubes other checkers miss. * 100 megohm grid leakage sensitivity to find the tough dog tubes fast. * Stethoscopic shorts test of 300K to pick out true shorts in the tube. * Burnout proof meter, even if a shorted tube is tested backwards. * FET balanced bridge circuitry for instant on action and greater accuracy. * All steel case for maximum protection and good looks for the life of the checker.