I am an easily confused old man.
My Atma-Sphere MA-1 140 watt tube amps use 5 amp fuses.
When I look at these fuses, the wire connecting one end to the other is absolutely tiny. At my age I need reading glasses to see it. Yes it is that thin.
This is the conduit through which the electricity flows. All the electricity.
The question I have: do you have an isolated ground with this dedicated 20amp service?.
This involves running a new wire outside, connected to a new copper rod, and having that rod driven into the ground, deep.
LOL, there is a lot more to many aftermarket power cords than merely the size of the conductors used. Nothing posted thus far has addressed any of that.
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Here is a quote from a post from Ralph, of Atma-Sphere:
"With power cords its all about voltage drop across the cord. Some of that is at 60Hz, and some of that is much much higher- well above 30KHz-100KHz depending on the power supply in the unit with which it is being used.
I’ve seen a 2 1/2 volt drop rob an amplifier of about 30% of its output power. The cord was rated for 10 amps, and the draw was about 6 amps. This measurement was done with a simple 3 1/2 digit Digital Voltmeter.
The more insidious problem is high frequency bandwidth. The power supplies of most amplifiers have a power transformer, a set of rectifiers, and a set of filter capacitors. The rectifiers only conduct when the power transformer output is higher than that of the filter caps. So:
When the caps are fully charged the amp is able to play. As it does so, the caps are discharged until the AC line voltage waveform gets high enough again that the rectifiers in the power supply are able to conduct. Depending on the state of charge of the filter capacitors, this might only be for a few microseconds or it might be a few milliseconds. Either way, the charge is a spike which has very steep sides- and requires some bandwidth to make it happen.
If the power cord has poor high frequency response, it will current limit on these spikes. This can result is subtle modulations in the power supply or even a sagging power supply voltage.
Romex wiring found in many buildings actually works quite well. So it really becomes all about that last few feet and also how well the power cord is terminated- molded cords generally are not terminated very well. If the ends of your power cord get warm after a while, you know you have a problem!
This can be measured, its quantifiable and also audible as many audiophiles know. Anyone who tells you differently probably has not bothered to do any measurements- please refer them to this post.
I can go into more depth but this is it in a nutshell. Incidentally, Shunyata Research is refining an instrument that does a more in-depth analysis of what this is all about. At the link you will see that their tests essentially confirm what I have said here."
http://www.theaudiobeat.com/visits/shunyata_visit_interview.htm
End of quoted material.
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Agon thread Link:
https://forum.audiogon.com/discussions/audiphile-power-cords#41
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As for the use of an isolated earth ground rod, that’s a no, no.
The purpose of the safety equipment ground is to provide a low resistive path for ground fault current to return to the source. Mother earth is not a low resistive path. If the earth is used as a path for ground fault current, and there is a ground fault event, the area around the earth driven ground rod works great for hunting fish worms.
The earth does not possess some magical mystical power that sucks nasties from an audio system.