Nixie multimeter repair (M1T-242)

Fixing an old bench multimeter M1T 242 with a nixie tube display and autorange function. It measures AC and DC voltages, currents and resistances in 4 ranges. It was made in Czechoslovakia in 1987 by Metra Blansko, mostly using Tesla components.
The online calculator:
ohmslaw.eu
The 2nd multimeter:
• Fixing what somebody e...
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