spt87a wrote: > Been reading up on the Transporter power supply topic with great > interest - thanks to everyone for all the good info over the last few > years. > > My own Transporter throws a lot of noise which impacts AM radio > throughout my house. I moved last fall and didn't notice this occurring > at my last place so I believe the Transporter has developed this problem > recently. > > In my case - I have the Transporter in a rack below a Denon tuner. With > the Transporter plugged into power there is noise across the entire AM > band. Unplug the Transporter and it goes away. I have other nearby > devices - XBOX One, cable DVR box, TV, etc. and no noise from them. > With the Transporter plugged in again, I then try my tube based > 1950's/60's table radio in the kitchen and same AM noise which goes away > with Transporter unplugged. Pretty sure the noise is going thru the > power lines as I haven't noticed the problem with battery powered > radios. > > .
If I might jump in with a couple things to try... I have this problem with a touch, in the same rack with some arcam gear, including a tuner, and always assumed it was the power supply. I never traced it down, just stream the AM station I am interested in. But, I know what you are experiencing. It still could be EMI/RFI, but it seems like you think that the transporter is imparting noise on your power lines, and it didn't happen at your old place, I assume the gear is positioned similarly in the same rack. It also seems that it isn't happening with all equipment on the same outlet/circuit because your kitchen radio has the same problem. Do I have this correct so far? Two things: - see if your kitchen outlet is on the same circuit as where your kit is plugged into. - try an outlet that is on the other "phase" of the house power. Don't know where you are located, but here in the US our 240/120 comes in with 2 hots a neutral and a ground. two "phases" 120 is derived from HotA and Neutral, and HotB and Neutral. In our circuit box, HotA is on the left (odd number breakers), HotB is on the right (even number breakers). If we need 240, the connection in the box is HotA to HotB (phase to phase). So, you can look at your box, find a circuit that is on the opposite side from your kit's outlet and run an extension chord from a nearby outlet on the other phase to your transporter to test. I suggest this because those "power line ethernet" adaptors work by modulating the signal on the power lines. They work best if it's the same circuit, but still may work if it's the same phase. It's highly unlikely that the work phase to phase. This would at least tell you if the noise is being imparted on the power line, or if its travelling through the air (more insidious :)) Jim ------------------------------------------------------------------------ Redrum's Profile: http://forums.slimdevices.com/member.php?userid=33806 View this thread: http://forums.slimdevices.com/showthread.php?t=100509 _______________________________________________ diy mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/diy
