Pye Mk3 Television Camera power supply unit

Type 842356/C serial number 418

Switches; top left on-off & mains input tap setting. Top right meter switch, valve currents. Toggle switches are B+ on and Camera AC on.

Pye used the primaries of the main PSU transformers as auto-transformers to supply 180v AC to other transformers and the camera. These transformers having a 180v primary winding.

On the rear is the mains input connector an EP4 wired to BBC standard 1=L, 2=N 3+4=E and the 20 way output connector made by  Magnetic Devices Ltd.