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« on: April 15, 2026, 04:36:20 PM »
Is this less < 1 dBu increase in level I’m measuring at 1 kHz when engaging the unit considered normal behavior? Or should I investigate anything?
The increase is caused by the tolerance on the potentiometers value. All your measures are within specs.
If you need an absolute no gain change, you need to temporarily replace R13 (15k) by a potentiometer, adjust the pot for 0 gain change, measure the pot resistance and replace it by a fixed resistor of equal value.
I do hear a small tick when it passes through the “off" positions of the KCS switch.
Normal. It is caused by the relay switching with an audio signal not null.
if I put pressure on the switch towards the right, the unit disengaged intermittently.
Did you solder the rotary switch absolutely flat on the PCB? Normally, this should not happen because the potentiometer shaft inside the hollow switch prevents it from bending.
If it happens with very little pressure, it will be necessary to replace the switch.
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