Ok, so I have built my optimised power supply but I have one slightly unusual result. I have followed the scematic but rather than getting 5vdc and 14v DC I get 5v DC and 9v DC. When I check the output of the bridge rectifier its putting 12v DC out. I have tried 2 different power supplies so I know its not the power supply at fault. Is someone able to tell me the voltage that should be comming directly out of the bridge rectifier before it hits the Caps? Could the problem be the bridge rectifier dropping the voltage? What should the voltage be out of the bridge rectifier? I wasnt able to get the B40C80 so I used a 1b4b42, which is 1amp 100v. Then on to the next point, because Im using a 8580 SID the SID actually requires 9v and my supply is putting out 9.02v then coudlnt I actually just feed that to the SID module as long as I use a 7809 voltage regulator and replace the c1&2 caps with 6,8nF? Be greatful if someone could help me understaqnd why Im getting 9v rather than 14 and then if I can use the 9v to power the SID module. Thanks!