Tag Archives: earthing

Construction Starts

Construction of the first Bluetooth Portable HiFi has started.  I am working on the power supply build. The photos above show the banks of power supply capacitors, one for the positive rail and the other for the negative.  They are … Continue reading

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Amp Testing & Bias Setting

The amplifier is now being tested and the bias set from the driver stage.  I am using an LM4702B to drive the 2SK1058 / 2SJ162 MOSFET output stage.  These devices will have a bias of 115mA to take them just into … Continue reading

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HiFi Amplifier Earthing / Ground

Don’t let anyone ever tell you it’s easy. In laying out the Kicad component footprints I have started to look at this area again – the phono socket earth ring, how does that connect to the PCB? There are so … Continue reading

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Earthing System for Hi-Fi

The earthing for a mains powered Hi-Fi system is pretty straight forward, so long as you keep the signal currents away from the heavy currents placed on the power supplies and don’t introduce any loops etc. The earthing for the … Continue reading

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Earthing, Ground, Reference, 0V, Return

One area that must be got right is the system earthing.  Specifically how each object is earthed with relation to each other object – by ‘object’ I mean PSU, Regulator Board, Relay Board, Left PreAmp etc. Apart from having separate … Continue reading

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