Hi

I have an Amanero USB to i2s converter with Cronus, Hermes and Rhea. Until now I connected this with a very short cat 5e cable to my Buffalo 2 via a RJ45 socket and a 2:1 mux. I also occasionally use a SACD player connected in the same way. It worked perfectly.

Yesterday I decided to install the Teleporters I bought years ago, to make it possible to use the converter more remotely, and just to adopt the most robust approach possible. So I installed a (v1.2) teleporter in the Converter module, and a (v 1.1) teleporter in the SACD player. It didn't work, no lock at all! I checked and rechecked my work, but all seemed fine, and I know you test all boards before dispatch.

I checked the support pages and found some reference to issues with the relative potential of transmitting and receiving compound grounds, and a description of the difference between v 1.1 and v 1.2 of the teleporter. I ran a wire between the Converter module's ps ground and buffalos' ground- which is connected to mains earth- and everything worked perfectly. (There is just this single earth connection to buffalo at its input. The spdif input is transformer coupled, and I use the balanced outputs which feed line input transformers in my preamp.)

What's the best way to resolve this issue long term? I'm surprised more people haven't reported this issue. Many source components will be unearthed category 2 devices- such as my SACD player- or powered by by floating power supply like my Amanero ( I use an iFi supply). I thought the best approach would be modify my v 1.1 teleporter to use a screened rj45 connector, ground this and the transmitters' v 1.2 connector locally, and use a shielded cat 5e lead between the two. Do you agree, or is there a better approach?

Many thanks

Paul Needs

Edited by user Wednesday, May 10, 2017 1:40:11 PM(UTC)  | Reason: Not specified

Hi Brian

I noticed that the v 1.2 connector isn't connected to ground on the board. I can jumper it, but why not connect it in the first place?

Do you mean to connect the screen or ground at both ends, or just at the day? My understanding indicates both ends, but this breaks the isolation. But I guess it the robustness of the differential signal which is the key thing here.

Thanks

Paul

Hi Brian

But should I connect the screen or ground at both ends, or just at the dac ? My understanding indicates both ends, but this breaks the isolation. But I guess it the robustness of the differential signal which is the key thing here.

Thanks

Paul