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Old 23rd April 2012, 11:12 AM   #201
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I2s ground (pin nr.5 )of my cdpro chassis goes to the ground pin of the Metronome. Should I run the ground through the Teleporter or not ? Can I use the ground for shielding the cat 5 cable using the 4 left over wires?

My english skills are way off when having a fever.
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Old 23rd April 2012, 11:36 AM   #202
Corpius is offline Corpius  Netherlands
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Hi Acidbrain,

Russ replied to met that the ground should also go through the teleporter.
Look here

I take the I2S signal from my cdpro2 like this:

CDPRO2 --> Teleporter --> Teleporter --> Metronome --> Sidecar --> DAC.

I'll be using Cat.6 cable. The provides more headroom, but Cat5 can handle the signals from the teleporter.
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Old 23rd April 2012, 11:54 AM   #203
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Thanks Corpius, I will do that. So this means the cdpro is floating, no real fysical gnd connection with the dac ?
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Old 23rd April 2012, 11:54 AM   #204
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The I2S ground should connect to the teleporter, but not between teleporters.
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Old 23rd April 2012, 12:08 PM   #205
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Hi Brian, How are the holidays ?

So the ground from the cdpro goes to a port or the gnd from the sending teleporter.(?)
No real gnd wire to the receiving teleporter and where do I attach the gnd from the metronome ?

A drawing of some kind would be helpful.
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Old 23rd April 2012, 12:21 PM   #206
Corpius is offline Corpius  Netherlands
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Quote:
Originally Posted by acidbrain View Post
A drawing of some kind would be helpful.
I Totally agree.

The 4 inputs closed to the boards are to connect the signals coming from a source. So the ground should probably be connected to one of the GND inputs (second row) behind the row of inputs, Right? If so, does it matter to which GND input it is connected?
Attached Images
File Type: jpg Teleporter GND conncection.jpg (45.4 KB, 293 views)

Last edited by Corpius; 23rd April 2012 at 12:24 PM.
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Old 23rd April 2012, 12:24 PM   #207
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Yes, ground to the second row, and no, it doesn't matter which one.

I would draw a pic, but I am restricted to my phone at the moment. It sounds like you get the idea though.

Off to LegoLand with the kidos ...
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Old 23rd April 2012, 12:38 PM   #208
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So the cdpro would be the only device that is not fysically connected with the shared gnd of my system. (only using i2s, mains earth cd-chassis is not connected to gnd )
This isolating has advantages, the same Russ mentioned earlier ?

You could answer later Brian, handsfree texting while driving is rather difficult

Last edited by acidbrain; 23rd April 2012 at 12:43 PM.
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Old 23rd April 2012, 11:31 PM   #209
ichiban is offline ichiban  United States
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Reconnected the pc sp/dif to Buffalo Sabre II via coax and no drop outs.
Either the teleporters are sensitive or the UTP Cat5 should be shielded,
the length is 100ft.


Quote:
Originally Posted by ichiban View Post
Thanks for the responses. Last night I did searches for lock problems on the TP Support Forum. Only got through the first three pages.
As to the ground potential difference, probably. The dac is in the living room and pc is in the kitchen, different AC lines. Getting them well grounded
could be a problem, our home built in the 50's is two wire not the three wire system.
Didn't have the lock problems when using coax to send sp/dif. Ground on cable saved the day? But I was going into the spdif-reciever then into the dac I2S inputs.
--------------------------------------------------------------------------------------
Just tried connecting pc&teleporter ground via a long wire to the dac ps.
Before connecting wire to dac I measured .23dcv & .9acv between ground wire and dac ps ground.
It did not make a difference. Lights, refrigerator motor starts/stops still cause unlocks!

I first tried the teleporters between a Phillips CD80 and the BII to transmit I2S signals. Can't recall now, if the lock problem occurred then. Both devices were on the same AC outlet. But, between every track there was a squelch. The I2S signal was tapped at the decoder output. I tried tapping at the SAA7220/DigitalFilter outputs tp the dac, but that wouldn't fly. I seem to recall that the 7220 level shifted the output to the dac for some reason!?
Quote:
Originally Posted by ichiban View Post


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Old 23rd April 2012, 11:51 PM   #210
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I had lock problems with Teleporters in my Denon 3910 to my BIII DAC. The 3910 did not have a ground lug on the IEC socket. It was like that from the factory. Installing an IEC socket with ground lug and attaching a chassis ground to it fixed my lock problem.

I have to go back in and connect my I2S grounds to the Teleporters based on Russ's post. To the ground row, not to a channel position, in the DAC and CD player.

We have a powered reclining chair in the listening room. Anytime the wife reclined the chair, I lost lock, the sound cuts out. This was after my Denon ground fix. My system is on a dedicated 20 amp isolated ground circuit, the chair is on a different circuit. Is that still DC through the mains or I need to put the covers back on the DAC and CD player?
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