darthtony

Hi, i am a beginner in electronics, and i decided tobuild this power supply. Unfortunately, i built the original design(here: http://www.electronics-lab.com/projects/power/001/index.html)(i didnt check out this topic). It seemed to work fine , but while i was testing it before finishing the enclosure, it started to have problems. Anyway, after a couple of burnt transistors, now i have a contsant(non-adjustable) output of 30V, howver the current limiting seems to work just fine. If i disconnect the middle wire from the voltage adjustment pot, the output will "float" around 1-4V, howver if i touch it to either of the other wires that go to the pot, it will shoot up to 30V again. Any ideas of what could be wrong?Are the corrections that i have seen necessary?(it really took me alot of time to make the pcb(twice, beacause once i printed it upside down) and to make it work, so i really dont want to start over again. thanks in advance I should note that it is not exacltly the original design: i am using a larger bridge rectifier, a 10,000uf cap, a second R7 i parallel with the first one, and 2x2n3772 in order to get 5-6A that my transformer(24VAC secondary) can supply.Howver right now i am testing it with only 1 2n3055.