the following link explains
http://www.diyaudio.com/forums/power-supplies/143693-simplistic-salas-low-voltage-shunt-regulator-200.html#post2108791

It's been fun to do simple head amps (RA1 clones) and chip amps (audiosector, chipamp.com) and then move onto 4 chip TDA boards off ebay into big heatsink chassis

Along the way I learned a lot about sourcing parts (a pain), chassis work (bigger pain) and component layout for optimal cable distance and distortion

My last finished project, the b1 buffer, was the best result so far.. it's simple, but it blew away my friends big name preamps.. enough that they are making a shift to DIY their own!

Time is a commodity that a lot of DIYaudio guys lack.. other responsbilities means we have very little time to devote to projects we start and a lot of times projects get drop to the wayside.

My latest project is the F5 and I hope to get it done by the next burning amp meet.. I want to see if I can convince papa to autograph that and the B1

2010/03/01; removed the unused Rotel amplifiers and re-arranged the rack. Looks much better now.