Hi all,
I have a bit of a head scratcher with channel tracking and the attached, very simple circuit.
I have an issue with a low input level of the DAC I use for my TV and made a very simple gainstage based on a standard OPAMP non-inverting circuit. It works very well, gain is at x3 (9db). This then goes into an ESP P97 preamp as indicated.
The problem I have is that there is a large channel imbalance when using the pot to adjust the level, but, when the pot is at max (zero resistance), the channels are perfectly balanced. So, perfect balance with no resistance, imbalance with any other setting.
I did speak with Rod at ESP and he stated it must be the load resistors are not matched, everything else being rulled out as the channels are balanced with no resistance (i.e. max setting). But, they are matched?
I thought to ask you guys here, I ask Rod too many questions (!)
I have a bit of a head scratcher with channel tracking and the attached, very simple circuit.
I have an issue with a low input level of the DAC I use for my TV and made a very simple gainstage based on a standard OPAMP non-inverting circuit. It works very well, gain is at x3 (9db). This then goes into an ESP P97 preamp as indicated.
The problem I have is that there is a large channel imbalance when using the pot to adjust the level, but, when the pot is at max (zero resistance), the channels are perfectly balanced. So, perfect balance with no resistance, imbalance with any other setting.
I did speak with Rod at ESP and he stated it must be the load resistors are not matched, everything else being rulled out as the channels are balanced with no resistance (i.e. max setting). But, they are matched?
I thought to ask you guys here, I ask Rod too many questions (!)
