@betwixt
@BradtheRad
Thank you for your replies.
I may have not drawn the transformer a clearly as I had hoped. It is actually a multitap transformer with 0v,3v,4.5v,9v and 12v at 750mA. I have another variable power supply schematic that would use them but I decided not to make things too complicated for now and tapped into the 9v only. Would switching over to the 12v improve things? As it is the LM317 it is just warm, I suppose at 12v I would need an appropriately sized heatsink?
I wil keep an eye out for the lower rated - slow blow fuse.
@BradtheRad
''Watch for surge current at power-up because the 3000 uF capacitor is like a dead short for a few cycles."
Should I put some sort of diode or fuse protection in between the transformer and the 3300uF capacitor or is that overkill?
I have now added a red led+1k resistor right after the 3300uF capacitor as a power on indicator. I noticed that it takes a few seconds for it to fade out as it drains power from the large capacitor. Is there a faster way to drain the capacitors? I'm thinking a resistor in parallel to it.
Again, thank you for sharing. I appreciate it.