The power supply arrived. I picked this one out as I saw a picture of it on Cedric Green’s site.  After using unregulated battery chargers, I am looking forward to using this piece of technology. The unit is a Velleman LAB POWER SUPPLY 0-30V / 0-10A DUAL LED DISPLAY Model PS3010U. I checked the various suppliers and ordered from Velleman.  It cost me about $200 US