Maybe, but that would make me question the stability of the regulator. More likely I would have thought was the inductance of the wire having a effect. But if (say) 1cm was unstable, its hard to know if 10cm (for example) was only just stable, or fine, or still prone to problems, just not as obviously. I would have tried to check the theory by trying to see the problem on a scope or measuring distortion and then check the theory by adding a 1R resistor in the supply.karatestu wrote: ↑Mon Jan 20, 2020 10:12 am True. My thoughts and those of others on pfm (who were far more electronics aware than me) were that the inductive nature of the output of the regulator needed a bit of resistance (provided by the extra wiring) to prevent oscillation with the low esr caps that are decoupling at the input of the opamps.
My point was you just have some hypothesis, but nothing certain. So all you have learnt is that you don't know for certain what happened.