I ran two dedicated circuits for my audio and video system, twisted 3 wire, over size wire inside conduit that is not connected on the outlet end, 2 ft apart full length of the run, plastic boxes, hospital grade outlets.
Now I need to test for AC line noise to see what filtering I might need. For now and at least a couple of years will use regular local power supply, eventually will have enough solar, batteries, good inverter, etc...
Also have a lot of smart meters 20 ft away so spending considerable time and funds on shielding as we plan to be here for some time in our RV.
All that said, looking into a way to test the line noise on the AC so I can best determine the proper filtering needed, DIY only, not going to buy some hugely over marketed and priced line conditioner, just not something I would do unless no other choice but I doubt really needed.
I know how to use an O-scope, retired Navy tech, and other gear but I only want to spend the minimal amount to get the job done.
I also need a good meter to check the smart meters, etc, so much BS when searching anything online these days it makes it hard to know what to believe so I am asking here because some of you know.
(I did search, might not of used the right terms, did not find what I was looking for.)
Thanks!!!
Rick
Now I need to test for AC line noise to see what filtering I might need. For now and at least a couple of years will use regular local power supply, eventually will have enough solar, batteries, good inverter, etc...
Also have a lot of smart meters 20 ft away so spending considerable time and funds on shielding as we plan to be here for some time in our RV.
All that said, looking into a way to test the line noise on the AC so I can best determine the proper filtering needed, DIY only, not going to buy some hugely over marketed and priced line conditioner, just not something I would do unless no other choice but I doubt really needed.
I know how to use an O-scope, retired Navy tech, and other gear but I only want to spend the minimal amount to get the job done.
I also need a good meter to check the smart meters, etc, so much BS when searching anything online these days it makes it hard to know what to believe so I am asking here because some of you know.
(I did search, might not of used the right terms, did not find what I was looking for.)
Thanks!!!
Rick
This site has various options for making mains AC voltage and current measurements:
https://wiki.analog.com/university/courses/tutorials/alm-awg-ac-mains-tests#:~:text=To display the AC line voltage waveform a,0 to 5 volt range of the M1k
https://wiki.analog.com/university/courses/tutorials/alm-awg-ac-mains-tests#:~:text=To display the AC line voltage waveform a,0 to 5 volt range of the M1k
Could always just build one inside an older, metal power strip, and then not think about it after.
I made one that has a couple common mode chokes, and three .47uf X caps.
Probably cost less than $20.
The only difference is a slight increase in timbre (details) using it. The isolation transformer is similar, but the cost is usually higher.
I made one that has a couple common mode chokes, and three .47uf X caps.
Probably cost less than $20.
The only difference is a slight increase in timbre (details) using it. The isolation transformer is similar, but the cost is usually higher.
And some of the noise is from the signal processing circuitry in your components. Safety is a real issue checking for line noise as well. There was an interface with transformers and filters that allowed for checking line noise with a scope and a spectrum analyzer .For your purposes something like this might be your best option : https://www.ebay.com/itm/2748714903...uag9KbwRtuTsaFuWJTP4ubdDw=|tkp:Bk9SR8LK0_CvYQ They aren't particularly wideband and the scaling/sensitivity is arbitrary but its easy to use, reasonably safe and not too expensive. The more serious option might be this https://www.ebay.com/itm/3742483650...V+kj8a9PFQxKWUVABM+mFazKA=|tkp:Bk9SR8aO3fKvYQ Its excellent for voltage noise and interfaces with scopes and spectrum analyzers safely. It has several isolation transformers and coupling caps to enable looking at noise in the presence of high voltage AC.
Magnetic field noise will also be present and some noise filters will make it worse. You need a pickup coil to see that.
Magnetic field noise will also be present and some noise filters will make it worse. You need a pickup coil to see that.