3420 - 

An economical, portable seven-decade resistance selector with a range of more than 11 Megohms in 1 ohm increments. This unit eliminates the guesswork and aids in the determination of appropriate resistance values. The substitution box is an easy-to-use, dedicated unit, which facilitates circuit design, breadboarding, and resolving circuitry problems. Has three binding posts, one to ground the case. The handy slimline size is housed using rugged metal construction. Slide switches are used to change the resistance values. Power: 1/2 watt (not to exceed 250 V). Accuracy: ±1% over 10 ohms, ±5% under 10 ohms. Size: 4" W × 6" H × 1" D. Weight: 13 oz.