I am about to build the Aleph30 from Volksamp. The circuit is slightly modified as compared to Pass Labs Aleph3. Could someone throw some light on the values of R1 and R8. In the Volksamp schematic, R1 is connected between the Source of Input MOSFET Pair and Drain of Q2/Negative Power Rail. R8 is connected from Gate of Q2 to Input pair Source and another R8 is in shunt with C11 in -IN line.
Any ideas on replacing Z3 9v1, with a transistor and forming a current source in conjunction with Q3 in order to reduce zener noise flowing into the input pair?
My simulations with Electronics WorkBench 5.0 showed that the square wave response is better with C8 10pf cap removed altogether and a capacitor about 47pf or higher connected in shunt with Z1 and Z2. Any comments?
Thanks everybody.
Any ideas on replacing Z3 9v1, with a transistor and forming a current source in conjunction with Q3 in order to reduce zener noise flowing into the input pair?
My simulations with Electronics WorkBench 5.0 showed that the square wave response is better with C8 10pf cap removed altogether and a capacitor about 47pf or higher connected in shunt with Z1 and Z2. Any comments?
Thanks everybody.