Reply To: Valves Won't Turn Off

[vik]

Thanks for getting back to me.

I bought a 24v Switched Mode AC DC Power Supply like this:

https://www.ebay.co.uk/itm/18W-750mA-Fixed-Voltage-24V-Switched-Mode-AC-DC-Power-Supply/282416149933

And then cut the plug off the end and wired it to the board.

Looks like this is the culprit – should a switching power supply work – or should I get another one which is only AC?