Vintage Micronta Range Doubler Multitester with 43 Ranges. New 9v & "A" battery included. The first two pictures show a testing of a 9V battery. It was my father's, he was a TV Tech. I know little about the tester. I only used it for testing small batteries. One time, I used it with high voltage. Our electric dryer was running without heat. I followed the info off YouTube on how to check it out. The dryer wasn't the getting enough voltage from the power box. Water had been coming in through the main electrical wire coming off the pole. When the electrician replaced the box, he said cases like that are rare. I didn't intend to write this small 'book'. There is a date on the inside of the box-Feb 1981. I have a rubber band on the box because I didn't put the two screws back in place.
