TRANSISTOR TESTER model 85 Places transistor into actual operation Operated upon contact Clear speaker tone-no visual observations to make Tests transistors in or out of circuit A complete electronic tester. No aditional adjustment required. Designed to reach into small areas. Maximum voltage applied to the base-emitter junction by tester is 0.8 volts. TO OPERATE - Set the selector switch to NPN or PNP. Place the contacts of the tester in the correct position on the printed circuit board. The tester will emit a tone indicating that the transistor under test is a functioning unit. The absence of a tone indicates a shorted or open transistor. Setting the selector switch to the wrong position will cause no harm to your circuit. TO REPLACE THE BATTERY - Pull off the speaker cap, ______ (cant read this illegible word in photo - "slide out" or a similar word goes here) speaker, slide the battery out for replacement. PRODUCTION DEVICESS PO BOX 20175 SANDIEGO CALIF 92120 714-442-4900