Friedrich I think most of us will stick with JLH for 2 reasons. 1.The Borbely designs are voltage specific. The JLH will work from <5V to >55V with minor, or no changes if suitably rated components are used to start with. 2. The Borbely regulators are far more expensive to build or buy. Check out the official price list !
NEW!!! ALL-FET Regulators for Highest Performance It. Type no. Description Comments Price EUR 1 EB-208/418 ALL-FET reg Dual low-noise +/-(5-36)V, 200mA Dual 185.00 2 EB-906/255L ALL-FET Dual low-noise SUPER-SHUNT regulator Load current up to 100mA, Vreg: 2x +/- 12-28V DUAL 199.00 3 EB-906/255H ALL-FET Dual low-noise SUPER-SHUNT regulator Load current up to 250mA, Vreg: 2x +/- 12-28V DUAL 248.00xT
This based on Shunt Regulator - audioXpress June 2007 page 28/33 Ed Simon
I read about in audioXpress some times ago (but I discontinuit my subscription)
Alex if you want more info about please send me a PM
Friedrich I read the .pdf and saw the schematics etc. I doubt very much that there will be any any earth shattering improvements over a properly constructed JLH using the Suntan CD286 low ESR 2,200uF electros as we specified. Have you actually tried the JLH using the specified components ? The latest PCB from Will and Jon even has provision for fine tuning the capacitors with the addition of a smaller value film or ceramic capacitor. Those other designs would cost me too much to even consider, especially the ready made ones. Even if the prices were in Dollars, and not Euros ! BTW, I have known about the various Erno Borbely designs for some time, and visited his website on several occasions. I even have a couple of Erno Borbely amplifier articles from the late 1980s/early 1990s. Alex