audio reproduction gear, music and other stuff
I bought this device from eBay to try if I can get a decent sound out of my smartphone when used as a source connected wirelessly via Bluetooth to the audio system. This is the more direct way compared to the case when a smartphone is used only to control the playback by means of communicating with a dedicated streamer via the local network.
I just recently finished an interesting project I would like to tell you about – a tube rectified regulated power supply dedicated to Oto’s phono board.
Continue reading “Tube rectified power supply for Oto’s phono stage”
This project came in as a logical end of a continuous process of refining the amplifier’s performance. The itch to check out how a stepped attenuator will perform against the ubiquitous volume potentiometer became increasingly acute after the surgery that transformed my Audio Note OTO Phono SE Signature integrated into a P1 SE Signature power amplifier.
Two coils, two caps and resistor, arranged across two drivers, with the purpose to divide the energy between them evenly. This is what I came up with after several months of experimentation. I tried almost everything, but it was the series crossover network that brought resolution and peace to my weary soul.
Although it made an analog junkie out of me, I have to admit that I’ve been aware of the slightly resonant signature of Oto’s phono stage. To my ears there has always been a sonic disparity between its line level and phono performance that manifested itself in a kind of exaggerated euphonic quality attributed to the latter.