I checked the Stovebolt Tech Tips and they suggest i need a power supply. Will this one work for my 51 radio from my 6V truck? Of will this power supply not give me enough amps? Thanks

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200434833030&ssPageName=STRK:MEWAX:IT


'51 Chevrolet 3100 216 5-Window