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In Reply to: RE: Scientific evidence of power cables reducing signal distortion posted by reddogpt on June 18, 2009 at 12:01:02
One point that will surely be objected to as it fly’s in opposition to popular folk lore is that high end audio gear is usually well designed.
There are examples of good engineering but low cost and high looks are obviously very important and some problems show incomplete design. Not surprising in this day of fewer and fewer analogue and low RF designers I suppose.
In another area, that of test equipment or any industrial electronics really, the job of the power supply is to deliver a steady DC voltage, filtering out the hum and remnant AC, steady enough so that the operation of the circuitry doesn’t change with varying input line voltages.
Test equipment may be used right next to a transmitter or comparatively huge noise source as part of it’s job, it CAN’T be effected by that stuff or it will give erroneous reading.
Want to see some examples, examine any analyzer or Voltmeter from Hewlett Packard from the 1980’s to see excellent design.
I designed and built sections of experimental hardware flown on STS-7 and STS-51a, part of the acceptance testing was confirming it would all work normally with a horrendous DC supply and that the 100 Amp furnace controller didn’t radiate more than a small amount in air or by conduction.
The point I guess is that if in the home environment, a piece of electronics is effected by RF noise on its AC cord which is changed by a “better cord” than one is certainly by the very concept of proper engineering, dealing with a poor or incomplete power supply design, regardless of what it looks like or costs.
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