BTW, what is the measured offset at the chip's outputs?
Think you could try it bypassing the blocking caps?
Omit the 15k resistors at the level pot end, folks.
Omit the 15k resistors at the level pot end, folks.
That 15k resistor is the resistance from the non-inverting input to ground. For minimum offset it should be the same resistance as from the inverting input to ground. But with an output cap then offset is no problem.
I would eliminate the 100 ohm and the 100k ohm at the output. Just turn on the amplifier 10s after the preamp so any DC that leaks through the output capacitors is dissipated across the input resistance of the power amp. Thus no thumps.
Its nice to be associated with smart people. I am a hobbyist/builder and have no idea what you guys are talking about. LOL.
Just to make sure adding an input switch to something like this would be simple right? I mean really simple or is a normal switch going to detract from the whole concept?
Reason I ask is over the years I seem to be going back to simpler things. No EQ first then I bought a simple Krell Pre with no base and treble. It sounds better all the time.
I love to build and all I need is two inputs. One for CD and one for my phono stage. And of course a volume control.
Appreciate the efforts in this thread. The engineering aspects are beyond me but I am intrigued with a potential project
I would love to make something into machined billet aluminum block with exposed components, etc for my audio rack.
I am using DQ-10s for speakers so I still need to drive with big power. No minimalist stuff in the amp section !
I am a hobbyist/builder and have no idea what you guys are talking about. LOL.
Just to make sure adding an input switch to something like this would be simple right? I mean really simple or is a normal switch going to detract from the whole concept?
I love to build and all I need is two inputs. One for CD and one for my phono stage. And of course a volume control.
HT means a DPDT toggle switch.
The 100 ohm is to stop oscillation of some op amps. The 100k is to drain the output cap.