Variable AC/DC Power Supply (4 Amp)

okay it's Paul here and I thought we'd have a little fun today and do something a little different while I'm sort of in between projects always have a lot of projects around but I got this idea and to develop a available DC power supply well yes what's so different about that idea everybody has DC available power supplies well not so I have a limited DC power supply it doesn't produce much Cohen it's not very efficient for working on tube radios for sure and then I have some one amp power supplies but they're 5 volt and 12 volt respectively they really don't have variable voltage per se I could fix that by doing what I'm about to do here but I wanted to show you this because I think it worked better for tube radios especially to videos that use AC or DC the older models so what I did is I got on eBay I got an eBay and I ordered a lot of some new diodes that they're one in five four oh f