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In Reply to: RE: Just show us the relevant physics behind it! posted by gusser on January 27, 2015 at 18:07:02
If you take 12 inches of 28 gage wire and it has 0.02 ohms resistance and you pass 0.1mA of signal, the wire will consume 0.0002 watts. Yippy.
Follow Ups:
> > 12 inches of 28 gage wire and it has 0.02 ohms resistance
But at what frequency?
The resistance is not independant of frequency.
DC resistance and AC resistance may not be equal.
If it is at 1KHz it may not be at 20Hz or 20KHz.
FYI I too am sold on solid core over stranded.
DanL
"> > 12 inches of 28 gage wire and it has 0.02 ohms resistance
But at what frequency?
The resistance is not independant of frequency.
DC resistance and AC resistance may not be equal.
If it is at 1KHz it may not be at 20Hz or 20KHz."
True. But the inductance of a 12 inch length of 28 gauge wire is about 0.4 micro Henries, so even at 20 KHz this would represent a reactance of only about 0.05 ohms. This would still be negligible, compared with the input impedance of the stage it was connecting to.
Chris
I am not saying I have all the answers but
I have found various gauge sizes and shapes
definitely changes sound as well as insulation.
Thinner gauges favor higher frequencies.
Thicker gauges favor lower freqencies.
I won't even get into flat/round/square wire.
DanL
But just because a violin and an amplifier both process sound in some fashion, that hardly means the same physical material laws apply.
Just as skin effect plays a major role on your CATV feed, that doesn't mean it's a factor in the performance of your audio interconnects.
"I am not saying I have all the answers but
I have found various gauge sizes and shapes
definitely changes sound as well as insulation.
Thinner gauges favor higher frequencies.
Thicker gauges favor lower freqencies.
I won't even get into flat/round/square wire."Well, it is hard to argue with anecdotal reports. All I would say is that with no apparent physical explanation that could plausibly account for the reported differences, and with no measurement data either, one would need to be extremely rigorous in conducting double-blind testing before being able to draw the conclusion that the effects were real. And certainly, before one could convince a skeptical outsider that the effects were real. "Extraordinary claims require extraordinary evidence."
Chris
Edits: 01/28/15
"If you take 12 inches of 28 gage wire and it has 0.02 ohms resistance and you pass 0.1mA of signal, the wire will consume 0.0002 watts. Yippy."
0.0002 micro-watts. Which makes your point even more strongly!
Chris
Edits: 01/27/15
45 volts peak (driver stage feeding output tube) across 250k grid resistor is .18ma
.18ma flowing across .02 ohms gives a .0000036 volt drop.
If we factor in the current needed to drive the Miller capacitance of the output tube the current will go up.
Assuming 3ma. and the voltage drop is .00006 volts.
Tre'
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