I have inherited from a friend a lot of car speakers, amplifiers and related equipements, 'cause his widow says i'm the only friend with some general interest in this field. Most of these stuffs are from the eighties, some are rusty, some were flooded a couple of years ago and recovered, anyway almost all are in an unknown state, so i want to test them all and decide what to keep, sell or discharge.
I tried one functional amp by using a PC power supply but it can't handle the power peaks.
I have a big 230V to 24Vac transformer, which could handle the required power, but i'd need to build a circuit to have the 12~14Vdc.
I'm not really an expert so i don't know how to take care of the required power, so my question is: what could be a cheap circuit to have 12Vdc and enough power to test that equipement, starting from 24Vac?
("test" means that i doubt i will try to go to full volume, and that i don't care if the circuit can generate some noise... all i want is to see what's working and what's not)