Here goes me asking about floating circuits again.
I've been trying to figure out a safe way to direct couple stages of a tube amplifier I'm building while still playing nice with external dacs. My specific dac has a direct coupled output with no capacitor buffer so I need to be careful what I connect it to.
I can either keep the input stage ground referenced and have the output of the amplifier be at a high positive voltage
or have the output be ground referenced and have the input stage be referenced to a high negative voltage but that would require me to float the entire dac which I'm still not sure I want to do.
The other option I'm thinking of is having the input stage at ground reference and having the amplifier be floating so the high voltage output is not a danger.
The problem I have here is that I do not understand what would happen if I connect a ground referenced dac output to the grid of an input tube in a floating amplifier.
Does this all of the sudden reference the entire amplifier to ground or will the bias just not work? I'm struggling to understand how the electrons will behave in this situation.
I've been trying to figure out a safe way to direct couple stages of a tube amplifier I'm building while still playing nice with external dacs. My specific dac has a direct coupled output with no capacitor buffer so I need to be careful what I connect it to.
I can either keep the input stage ground referenced and have the output of the amplifier be at a high positive voltage
or have the output be ground referenced and have the input stage be referenced to a high negative voltage but that would require me to float the entire dac which I'm still not sure I want to do.
The other option I'm thinking of is having the input stage at ground reference and having the amplifier be floating so the high voltage output is not a danger.
The problem I have here is that I do not understand what would happen if I connect a ground referenced dac output to the grid of an input tube in a floating amplifier.
Does this all of the sudden reference the entire amplifier to ground or will the bias just not work? I'm struggling to understand how the electrons will behave in this situation.