Aw gee gentlemen, please!
According to my Oxford Dictionary 'argue' commonly indicates an effort to convince another side of your point of view, not necessarily of the truth! And 'bias' appears to be 'slanting' an existing condition to a different 'value' in this case.
Over-bias would thus mean too high a bias (voltage) or vice versa. Regarding quiescent current in semi-conductor circuits ..... but this is a tube thread! So not to discombobulate matters further.
Regarding tube rolling, it is often overlooked (or not understood), that there is a spread in same number tube characteristics. In present times experience shows this to be as large as + and - 15%, and sometimes as high as + and - 30% with the same brand items! (I am talking of batches of 20 - 30 items at a time). That makes it rather meaningless to state a preferred tube brand - what were the exact characteristics of the tube you 'rolled'? Some decade ago there was the then often encountered 'tube rolling' among guitarists. One gentleman was careful to also mention the current drawn together with the subjective experiences had. The difference between tubes causing an audible difference ..... was a factor >two! These were in a voltage amplifying stage; no wonder the sound differed if one contemplates the work point changes in the same circuit!
One would accept that manufacturers would quote electrode voltages using bogey tubes for their data sheets. This, together with component tolerances between models, might account for a sometimes mild horror show of different conditions.
You can 'roll' tubes and/or components in your amplifier to your heart's content; you have paid for it. But let us be practical and sober when glibly claiming that brand A is better than brand B (full stop!) on the basis of one/two-off examples. (I would still moderately assume that designers knew what they were doing when designing a circuit .... )
According to my Oxford Dictionary 'argue' commonly indicates an effort to convince another side of your point of view, not necessarily of the truth! And 'bias' appears to be 'slanting' an existing condition to a different 'value' in this case.
Over-bias would thus mean too high a bias (voltage) or vice versa. Regarding quiescent current in semi-conductor circuits ..... but this is a tube thread! So not to discombobulate matters further.
Regarding tube rolling, it is often overlooked (or not understood), that there is a spread in same number tube characteristics. In present times experience shows this to be as large as + and - 15%, and sometimes as high as + and - 30% with the same brand items! (I am talking of batches of 20 - 30 items at a time). That makes it rather meaningless to state a preferred tube brand - what were the exact characteristics of the tube you 'rolled'? Some decade ago there was the then often encountered 'tube rolling' among guitarists. One gentleman was careful to also mention the current drawn together with the subjective experiences had. The difference between tubes causing an audible difference ..... was a factor >two! These were in a voltage amplifying stage; no wonder the sound differed if one contemplates the work point changes in the same circuit!
One would accept that manufacturers would quote electrode voltages using bogey tubes for their data sheets. This, together with component tolerances between models, might account for a sometimes mild horror show of different conditions.
You can 'roll' tubes and/or components in your amplifier to your heart's content; you have paid for it. But let us be practical and sober when glibly claiming that brand A is better than brand B (full stop!) on the basis of one/two-off examples. (I would still moderately assume that designers knew what they were doing when designing a circuit .... )