In preparations for my future amplifier builds I decided to start from a good power supply. For maximum performance, dual mono configuration is a must. But, I felt that this is a waste of my financial resources and planet Earth resources. Two oversized audio grade transformers, huge capacitor banks, specific “sounding good” capacitors, etc. Single regulated linear PS would be better than ordinary dual mono CRC, but I didn’t find any with low dropout, high PSRR, high output current, low noise, low output impedance and good transient response, in the same package.
So, I decided to make a one.
Silly me.
It was not an easy task.
Best approach seemed to be an add-on module for various existing CRC power supplies that replaces resistor in the CRC line and turns power supply in to the regulated one. I had some excellent CRC PS boards with active (synchronized) rectification from prasi (ANALOG DESIGN) and that was a starting point.
Final result is on the picture below and those modules should fit to all CRC PS designs suitable for amplifiers available in the Pass Labs section.
They work, as is without any changes, from 10 to 65 V output voltage and load up to 10 A, with dropout voltage of 0.15 V for 10 A load, PSRR greater than 100 dB @ 100/120 Hz and total noise less than 3 µV.
Diyaudio is a place where wealth of designs is available for free and, by extraordinary generosity of Mr. Nelson Pass, we get for free IP that someone else would charge you an arm and a leg.
Completing design that was not available and that could be of use to someone else except me, the only right thing to do would be to make an additional effort and provide complete documentation, but … not a small baggage comes along with such decision. After some debate with myself, here we go with my small contribution:
An arguably better replacement for the resistor in a CRC power supply - R21 PS module
So, I decided to make a one.
Silly me.
It was not an easy task.
Best approach seemed to be an add-on module for various existing CRC power supplies that replaces resistor in the CRC line and turns power supply in to the regulated one. I had some excellent CRC PS boards with active (synchronized) rectification from prasi (ANALOG DESIGN) and that was a starting point.
Final result is on the picture below and those modules should fit to all CRC PS designs suitable for amplifiers available in the Pass Labs section.
They work, as is without any changes, from 10 to 65 V output voltage and load up to 10 A, with dropout voltage of 0.15 V for 10 A load, PSRR greater than 100 dB @ 100/120 Hz and total noise less than 3 µV.
Diyaudio is a place where wealth of designs is available for free and, by extraordinary generosity of Mr. Nelson Pass, we get for free IP that someone else would charge you an arm and a leg.
Completing design that was not available and that could be of use to someone else except me, the only right thing to do would be to make an additional effort and provide complete documentation, but … not a small baggage comes along with such decision. After some debate with myself, here we go with my small contribution:
An arguably better replacement for the resistor in a CRC power supply - R21 PS module
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It is an interesting upgrade to any FW standard CRC power supply. From electrical standpoint, difference in PS output is dramatic.
If you ever wondered how would your amplifier sound with Jung super regulator, available only as 0.2 A capable PS for preamplifiers and DACs, now you can check. This design is not strictly the same as Jung super regulator, as it is designed for very low dropout and high current, but it is similar type of super regulator.
If you ever wondered how would your amplifier sound with Jung super regulator, available only as 0.2 A capable PS for preamplifiers and DACs, now you can check. This design is not strictly the same as Jung super regulator, as it is designed for very low dropout and high current, but it is similar type of super regulator.
Following with great interest - and appreciation of your strategy, research and development efforts.