Measuring line noise and power conditioners

cakyol

Your statements fly in the face of long settled science.

Dude, google is your friend. Look it up: EMI ; RFI ; broadcast radiation.  Halfwave rectifiers.  Cell phones.......


Why does every research lab doing milspec research utilize power filtration: LASL; Sandia Labs; Lawrence/Livermore; KAFB; MIT; Stanford; NASA; DARPA; Fermi Institute; VVA; every semiconductor manufacturer on the face of the earth and on and on and on and...

You are just wrong. You are simply clueless.  Do some homework.  Try something.

Addenda:

https://www.eetimes.com/electrical-noise-and-mitigation-part-1-noise-definition-categories-and-measu...

https://www.allaboutcircuits.com/technical-articles/electrical-noise-what-causes-noise-in-electrical...

https://www.sciencedirect.com/topics/engineering/electrical-noise

http://www.arrl.org/power-line-noise
https://www.prelectronics.com/support/pr-knowledge-library/tips-and-tricks/8-tips-and-advice-for-red...
https://www.techhive.com/article/3063590/how-to-get-rid-of-hum-and-eliminate-other-noises-from-your-...

https://www.gcaudio.com/tips-tricks/power-line-distrubances/

http://www.equitech.com/articles/rep1.html
https://www.prosoundweb.com/in-the-studio-preventing-hum-and-rfi/

https://www.soundonsound.com/sound-advice/q-how-can-permanently-stop-mains-noise-my-studio

Need more?  I got million examples..

Duh.

People think this is something we understand well enough to even begin to measure. Why? The answer can only be: because you haven't even tried listening. Soon as you do, all this nonsense about measuring noise goes right out the window. To even ask the question is to show you literally do not have a clue.

LOL.... Everyone missed my point. I never argued about the EXISTENCE of noise. I simply said it is ALREADY taken care of inside the amp itself. Almost all decent amps today deal with it internally. There is NO need for an external noise filter.

And here is a small article for your education:

https://www.eetimes.com/bypass-or-decouple-your-way-to-power-supply-noise-reduction/

And here is another one. Read page 3 especially:

https://www.ti.com/lit/an/snaa057c/snaa057c.pdf?ts=1592043954950&ref_url=https%253A%252F%252Fwww.google.com%252F

Note that all these methods ALREADY exist in all decent amps costing more than about $1k and the filter components cost about 30 bucks at most.

And here are some examples of IEC inlet filters, a FEW bucks each:

http://www.radiuspower.com/emi-filters/iec-inlet-filters

What do you think are inside those expensive power conditioners LOL ?
Open one up & see one day.