Electrical measuring device of the "TL-4" type.

Instruments for adjusting and controlling the PTA.The electrical measuring device of the "TL-4" type has been produced since 1965. An electrical measuring device of the "TL-4" type is an ampere-voltmeter designed to measure DC and AC voltages over a wide range, as well as resistances in various electrical circuits. More details in the documentation below. Since 1981 the device “TL-4M” has been produced, and since 1987 the device “TL-4M2” with the addition of functions for measuring the parameters of transistors. There is no other information on these devices yet.