Excellent Power Supply Solution
I'll check it out. It's for a cable router, from the cable company. All of them are noisy. They have to be on a different circuit. No noise problem NOW, but it took a GL device and a different circuit, to do it.. They use to pull more watts than a class d working hard.. Quite the piles of dung.. BUT, I like the Music Channels, the wife like "Below Decks", I haven't watched TV in 3 years. 2-3 hours at the kids maybe..in 3 years.. 3rd or 4th one. This was the cable company's fix... I moved it to a separate circuit. Regards |
For reasons stated earlier in the thread, I don't buy into linear PSU for a router/networking device. I do for anything outputting audible analog signals. Being lazy at one point I had a power strip with all SMPS for various things plugged into an outlet shared with a Panamax filtering strip for my amp, DAC and preamp, and one day realized that things didn't sound as good as I thought it could. I had received my shipment of equipment from storage after having recently moved and was in a rush to hear my gear again. It took me a few moments to realize what I had done and when I did I moved that whole strip to another outlet a few yards away which don't run near each other at any point before the breaker box. The sound improved quite a bit. A smaller improvement was had by moving the power brick for my tiny PC to a filtered outlet on the Panamax. I think that last one may have had something to do with USB and it transmitting power on the cable between the PC and the DAC. I think the lighting strip is a good solution if noise is an issue even after putting the devices on a separate outlet. Minimizing the noise on the AC circuit closest to the amplification is pretty important. @oldhvymec, I keep my DVR turned off. It's a WAF thang that it's even in the rack. Damn HDD can be heard when I have the house on quiet mode (air filters, and cat water bowls turned off). I hate that you can't truly power off a cable DVR unit. I put a remote outlet on that thing so it turns on and off for the times that my wife might want to actually watch tv and can use voice command to turn it on otherwise. |
The one thing that I wan to point out regarding power supplies, is that they are 2 way devices. They can in fact create noise which makes it back into the household AC which then gets picked up elsewhere. Look at it this way:
For this reason, I think linear power supplies can be a good idea for digital devices, but so can having multiple power filters or isolated filter banks. Try to keep all the cheap wall warts "outside" of your analog power circuits. I wrote about this somewhat here: https://www.blogger.com/blog/post/edit/7333914575040594914/3933177263956486881 Best, Erik |
Oh the wonderful power of suggestion even self suggestion. I will guarantee you one thing with complete confidence, this power supply will be anything but “very low ripple and noise.” from a purely electrical standpoint. It is meant for lighting. When they say ripple, they mean DC ripple for lighting so you don't get minor strobe effects. You can have pretty large ripple in lighting without strobe effects. When they say noise, they literally mean acoustic noise as most linear strips are dimmed with PWM and it makes many power supplies buzz. What it won't be is less electrically noisy than most other things, those running it at a fraction of its rated power may result in less EMI than something ran at its rated power. Caykol, noise on the AC lines in the 10's of MHz from a switch mode is not unheard of, nor is radiated EMI at RF frequencies, into the 10's and hundred of MHZ. |
