Alteration of the power supply of the TR-4 multitester

Modern multitester-oscilloscope-generator - https://ali.ski/7rsoI.

The tester was powered by a crown, which is quickly discharged from storage.

For power from an external source, a stabilized 12-9 volt DC-DC step down was supplied.

Before installation, the DC-DC was set to 9 volts with a load of 470 ohms.

Buy DC-DC step down - https://ali.ski/r5LBQ.

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