1
The test setup. Variac on the left with DVM measuring line Volts. Transformer center with dummy load to the right of that. Simpson 260 to the right measuring output Volts.

2
AC line is connected.

3
Input voltage measured at the transformer, 241 VAC.

4
AC voltage measured at the dummy load. That's 5000 VAC scale, 2700 VAC.

5
Variac and transformer connections.

6
Transformer to dummy load connections.

7
Variac wiring.

8
Transformer primary wiring.

9
Dummy load tapped for 2700 Ohms.

10
Transformer secondary wiring.