Dr nEon
Well-known member
I have just finished adjustments to my 2180LA gssl .Sounding nice! :grin:
But I just noticed something which may be wrong:
I can see a small DC voltage at pin 1 of the vcas .. left channel = 4mV
right channel = 0.5mV
I tried replacing the right channel vca with another 2180LA , and this time the dc voltage on pin 1 is 1.6 mV .
Is this anything to be worrying about? Or is it the input offset voltage I'm seeing?
The same discrepancy is also visible at the two summing resistors.
I did the above test without an input signal present.
When a input is applied , the (ac) signal levels do seem to be fine throughout..
Do I have a problem , houston ??
But I just noticed something which may be wrong:
I can see a small DC voltage at pin 1 of the vcas .. left channel = 4mV
right channel = 0.5mV
I tried replacing the right channel vca with another 2180LA , and this time the dc voltage on pin 1 is 1.6 mV .
Is this anything to be worrying about? Or is it the input offset voltage I'm seeing?
The same discrepancy is also visible at the two summing resistors.
I did the above test without an input signal present.
When a input is applied , the (ac) signal levels do seem to be fine throughout..
Do I have a problem , houston ??