audioguru Posted October 12, 2012 Report Share Posted October 12, 2012 The original project used TL081 opamps and their total power supply voltage was higher than allowed. Then I changed the opamps to ones that are allowed the high supply voltage.The original project used a transformer that was overloaded and its voltage was too low.I changed it so it works perfectly.What transformer are you using?This project has the driver and output transistors inside the negative feedback loop of the voltage regulating opamp so the voltage regulation is excellent.But you said that you added "a pair of 2N3055 as voltage follower" that are not needed and might ruin the voltage regulation.Please post your schematic. Quote Link to comment Share on other sites More sharing options...
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