08-29-2007 Post does not mapped to Knowledge Tree Romy the Cat Boston, MA Posts 10,156 Joined on 05-28-2004 Post #: 1 Post ID: 5160 Reply to: 5160 A truly cool solution for RIAA re-tuning…. All records, particularly from good period, were recorded at different equalization. Even the records that were RIAA marked were in fact WAY off… How to deal with it? Running a feedback to high impedance, in the way how it made in EAR 384P, permited useing ultra small values of caps. I use variable air caps that act as a perfect equalizers… However, the variable air caps are very hard to dial-in exactly, at least the caps that I'm useing. Here I found today a solution that might do exactly what is necessary. It is an electronically programmable capacitor. So far it is up to 14.5pF, another year and it will be larger and as soon it hits hundreds of pFs it will be perfect for LP correction. I do not know how they milk capacitates in there and I hope that capacitates do have good sound…. http://www.intersil.com/cda/deviceinfo/0,1477,X90100,0.html The caT "I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche

08-29-2007 Post does not mapped to Knowledge Tree Paul S San Diego, California, USA Posts 2,657 Joined on 10-12-2006 Post #: 2 Post ID: 5163 Reply to: 5160 So, you do this by ear? How is one sure of finding/matching the actual turnovers used for the recording, since, as you mention, the labels don't always tell the whole story? Or is this just another way to fiddle with the sound? Does the switching get/stay out of the way? Cool idea, anyway! I hope the resistors themselves sound OK. Best, Paul S

08-30-2007 Post does not mapped to Knowledge Tree drdna San Francisco, California Posts 526 Joined on 10-29-2005 Post #: 3 Post ID: 5167 Reply to: 5160 Dialing in Romy, next you will be suggesting a digital equalizer! ;D