I don't have a hackernap but i do have the Avondale Ncc200 boards with VBE boards. Is this idea the same as regulating the front end of the board? If it is then VBE is the way to go it sounds much better, a totally different amp.
I think the issue is that the opamp used on the superreg is limited in voltage output. I think John has managed to tweak it to give more but i dont know how. Other options to replace the on board regulator are the Avondale VBE board or the Avondale HCR board
I think the following links may help you, after the recent group buy for ALWSR there was a build thread, and I have been recording my efforts in putting ALSWR in a NAXO. Plenty more stuff to find on pfm about ALWSR but these are up to date and include links to a google docs BOM and the latest ALWSR online manual plus plenty of advice and experience.John
thank you for your reply, I have been researching ALWSR and I think I can see whats going on. I am unsure about C4 - I think this should be 100uF (?) low esr capacitor, and I am not sure where the negative supply for the op amp should be grounded - on the power input rail? Also where is the 0v sense rail grounded. I presume all capacitors will be electrolytic unless they have a low esr rating. Finally, I am slightly confused that there is 55v input and 55v output. I thought there should be a drop of say 2.5-5v across the regulator. I've checked with RS and I can get all the components next week, so I can get building. I have an weeks holiday next week enforced by the company I work for. This is why I thought i'd get on and finish my unfinished hackernap. Thank you for your help, look forward to your response. Keep well.
Dave
I believe the main input is the 60v line. The output from the regulator is 55v and it also goes to both the vref bank of led’s and the VBE for the supply voltage to the opampFinally, I am slightly confused that there is 55v input and 55v output. I thought there should be a drop of say 2.5-5v across the regulator