Archive for the ‘Other Amplifiers’ Category

Ipod LM1876 amp

Sunday, May 27th, 2007

This is a photo type for a Ipod amplifier.  It use 6DJ8 with supply at about +44V as input buffer and then drive a LM1876 IC power amplifier.

Circuit

All Jfet Op-amp – not completed

Wednesday, May 16th, 2007

This is another Borbely Erno design op-amp using all jfets.  This is the most complicated one with high gain and thus a servo is required to maintain the output at near 0Vdc.  I have tried this op-amp but I have not make it up to the best sound.  As of 2009, I think the all jfet buffer line amp sound the best.

All Jfet op-amp Circuit