Pace Car Killer Mods

[sandyk]

Another PSU Addon which is reported to give almost as good results as the Paul Hynes Regulators, is a design published in ETI International many years ago by the late John Linsley Hood. Typical specs. were given as 4uV noise , and an impedance below .02 ohms over the range 500HZ to 30KHZ, and < 0.1 ohm over the range 35HZ to 300KHZ. Back then, low ESR capacitors were not not used, and using modern low ESR capacitors, these figures are much improved. The design is non voltage specific, and dual rail versions can be constructed. It has essentially 2 sections, which are a capacitance multiplier with a simulated capacitance of approx. 0.5Farad, and a "ripple eater" section which opposes noise/ ripple on the output, with a correction ripple. The JLH PSU Addon is FAR less costly to construct, and can be used with currents in excess of 600mA, and voltage rails >55V with suitable transistors, and capacitor rating selection.

 

SandyK

 

[sandyk]

The JLHs have been extensively used by quite a few people in the last year or so,(>120) and have been judged to sound ALMOST as good as the Paul Hynes regulators when used with the +5v and higher voltage rails of the Twisted pear Buffalo 32 S DAC. Not everybody can afford to splash around that kind of money for Paul Hynes regulators, where the cost of the regulators alone, can exceed the cost of the rest of the whole project.

Please note that I have no financial involvement with anything to do with the JLH. I have been using them for many years with all of my gear, and substantially upgraded the original design for use by fellow DIYers.

 

SandyK

 

[sandyk]

Jesus R

If you are looking for info on the JLH PSU Addon , you are unlikely to find it there . The caretaker was not even aware of this PSU Addon until I sent him a copy of the original article from ETI a couple of years ago. I can email full info if requested.

Alex