I completely removed R55 (R60 in my schematic) for now and the level is good.
My plan is to replace it with a trim pot for variable adjustment.
The setting of the power amp trim pots seems to be very critical for the amount of distortion and noise so I want to experiment with this a bit more while keeping the line level constant.
In addition to the noisy chorus (which is expected) I noticed a strange thing where a distorted version of the dry CH1 signal seems to make its way to CH2.
I suspect it has something to do with the signal loopback for the muter circuit. I checked the signal at C121 and it is exactly the distorted signal that I can faintly hear in the background on CH2.
It is very obvious when listening to the chorus signal at C93 with the chorus off (SW2 in position 2), which should normally not give any signal at all.
Is this behaviour expected or is something wrong? I'd guess it was always like this on my amp but I am only noticing it now after listening to CH2 completely isolated through headphones.
My plan is to replace it with a trim pot for variable adjustment.
The setting of the power amp trim pots seems to be very critical for the amount of distortion and noise so I want to experiment with this a bit more while keeping the line level constant.
In addition to the noisy chorus (which is expected) I noticed a strange thing where a distorted version of the dry CH1 signal seems to make its way to CH2.
I suspect it has something to do with the signal loopback for the muter circuit. I checked the signal at C121 and it is exactly the distorted signal that I can faintly hear in the background on CH2.
It is very obvious when listening to the chorus signal at C93 with the chorus off (SW2 in position 2), which should normally not give any signal at all.
Is this behaviour expected or is something wrong? I'd guess it was always like this on my amp but I am only noticing it now after listening to CH2 completely isolated through headphones.