Such as this: http://uk.farnell.com/tenma/72-10480/power-supply-1ch-30v-3a-adjustable/dp/2251946
Although I’ve seen these at around £35 instead of the £50 they want currently. Is that Brexiteering?
Already needed it twice in the space, there’s a borrowed one there at the moment.
Surprised we don’t have one already - although I believe at GG we often used @gingebot’s LCD PSU that he had.
Is there anyone out there who has a PSU to donate to the space? 
Always worth asking!
Alternatively @Macaba might have some comments on power supplies. I’d be very interested to hear of the total cost of his DIY solution that was rather hefty.
Could use a linear L200C regulator ic. There is a circuit on Circuit Exchange International website… zen22142.zen.co.uk/ schematics/power circuits/23 Current limited power supply. Have delivered a few components to Guildford Boiler Room and purchased a few rotary switches, power resistors etc. Be attending on June 14th.
Now decided to clear away the components/case etc. to make more room on bench as I"m not yet a full member. Be attending tomorrow Friday where hopefully can get signed up. A major problem is the current selection switch as the open stacked style wafer type have been superseded by the enclosed type.