Comwiz999

I seem to be having a problem sourcing the parts. The closest the biggest supplier in the country can only offer is a 2x15VAC transformer. Can I use this? Otherwise, a 24VAC transformer is availible. Is there any good options for this voltage?

Hey guys I would like to build this circuit and I am looking for the best working solution..There are so many revisions I am not sure which is best. Can anybody please advise me on this? Thanks