supply board for output amplifiers
supply board for output amplifiers
Apart from their electronic configuration,all output amplifiers comprisethe same elements: an amplifierboard, a mains transformer, a bridgerectifier, and electrolytic smoothingcapacitors. The board is normallyscrewed to the heat sink, while thetransformer and bridge rectifier arefixed to the bottom of the enclosure.Often, there is no such defined locationfor the electrolytic capacitors.These are mounted on a piece ofprototyping board, or to the bottomof the enclosure with suitable brackets.
Since this is a recurring difficulty,many constructors will be pleasedwith the board design shown here.Its layout is such that it is suitable foruse with almost any type of outputamplifier operating from a symmetricalpower supply.The board can accommodate sixelectrolytic capacitors with a value ofup to 10,000 μF and a rating of 50 V.They are assumed to have a pitch of