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ms660 · 16th May 2021, 4:08 pm

The brown wires aren't the cathode they're the heater, the cathode is the Red wire that's connected to the 2.7k resistor on the reservoir capacitor.

Lawrence.

16th May 2021, 4:08 pm	#9
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Bush BAC31 mains unit The brown wires aren't the cathode they're the heater, the cathode is the Red wire that's connected to the 2.7k resistor on the reservoir capacitor. Lawrence.