Musicseller: Try disconnecting your audio gear from the outlets while leaving the NH plugged in. If the light show remains, you've got a ton of noise coming in on that circuit. If the light show slows or disappears when plugged in by itself, your audio gear is generating at least part of the noise that the NH is picking up.
Using this approach, one can plug the NH into various outlets and find which of their house circuits / individual outlets is "cleanest". Once the "cleanest" outlet is found, you can plug one individual component at a time into the other outlet of the duplex that the NH is plugged into. By checking the "light show" of the NH, you can now see which of your individual components generates noise BACK INTO the AC system. Be aware that some components will do this whether they are turned on or off !!!
If you find an individual component that causes the NH to put on quite a light show, you may want to take steps to try and isolate / filter the AC coming in and out of that individual component. This can be done several different ways i.e. through the use of an isolation transformer, tuned AC filters, parallel line traps, etc...
Another trick that one can do is to use the NH as a "test circuit" for various AC line conditioners. That is, plug the NH directly into the wall and watch the light show. Now plug the NH into the various outlets of the PLC / filters that you may be using and compare the differences. If the NH flashes at or very near the same rate in both places i.e. when plugged directly into the wall OR plugged into your PLC, the PLC / filter isn't doing much to control incoming noise. Sean
>
Using this approach, one can plug the NH into various outlets and find which of their house circuits / individual outlets is "cleanest". Once the "cleanest" outlet is found, you can plug one individual component at a time into the other outlet of the duplex that the NH is plugged into. By checking the "light show" of the NH, you can now see which of your individual components generates noise BACK INTO the AC system. Be aware that some components will do this whether they are turned on or off !!!
If you find an individual component that causes the NH to put on quite a light show, you may want to take steps to try and isolate / filter the AC coming in and out of that individual component. This can be done several different ways i.e. through the use of an isolation transformer, tuned AC filters, parallel line traps, etc...
Another trick that one can do is to use the NH as a "test circuit" for various AC line conditioners. That is, plug the NH directly into the wall and watch the light show. Now plug the NH into the various outlets of the PLC / filters that you may be using and compare the differences. If the NH flashes at or very near the same rate in both places i.e. when plugged directly into the wall OR plugged into your PLC, the PLC / filter isn't doing much to control incoming noise. Sean
>