Additional device for testing transistors "P-222".
Instruments for adjusting and controlling the PTA.An additional device for testing transistors "P-222" has been produced by the Omsk plant "Electrotochpribor" since 1973. The device is designed to measure the serviceability and parameters of forward and reverse conduction transistors together with a combined device of the "Ts-20" type. The disadvantage of the device is the change in the polarity of the batteries when checking transistors of different conductivity. Radio amateurs put a battery polarity switch between the handles of the device.
