1979 Micronta Dynamic Transistor Checker / Tester 22-024 1979 Micronta Dynamic Transistor Checker / Tester 22-024 Made in Japan by Micronta for the Tandy/ Radio Shack brands. An electronic copy of the original instruction manual can be provided upon request. An interesting piece of electronic history, the instrument is designed to take a 'C' cell battery, which is not included due to the difficulties in shipping. The meter is in fairly good working condition with some scuffs and blemishes commensurate with age and use. Manufactured by Micronta (Japan) for Tandy/Radio Shack Manufacturing Date: 1970s Meter Type: Dynamic Transistor Checker Approximate case Size (W.H.D): 12.3 cm x 17 cm x 5 cm Tests PNP and NPN Power types. The image below shows this meter testing a PNP transistor. Please click on the following link for more vintage tests, measures and meters.