Archive for the Category


Class-A MOSFET Amplifier by 2SK1058

Friday, April 18th, 2008
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This is simple Class-A MOSFET Amplifier, used mosfet 2SK1058 in circuit.
It is easy to make, Must use supply volte 24V at high current. read more
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I am using this Class A Amplifier with a 12AU7 based valve preamp. It produces the most purest sound. I have no idea of distortion levels etc. but it has [...]

Simple Class A Power Amplifier by IRF530

Thursday, February 28th, 2008
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I was in need of high quality headphones amplifier because of many reasons and decided to build SDS Labs phone amp. This is extremely rewarding project in a sense that it is fully documented, includes PCB, parts list and building notes - so it’s easy to build and then it sounds great. I have used [...]

Class A Power Amplifier by IRF530N+78L05

Thursday, February 28th, 2008
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This is the best design I have came up so far!
I use two 6×6×4cm heatsinks per channel. Power supply is unregulated (just transformer, diode bridge and capacitors) but I cannot hear anything even when I put my ear within few centimeters of the loudspeaker. Opamp has very good power supply rejection ratio. I’ve tried to [...]