B 111 se upgrade lock problem.

[spresto9]

Hi anyone please help,
having updated my dac from B 11 / Mercury to B 111 se / Mercury it sounds great on s/pdif but I have a lock problem when connecting to my streamer / teleporter for i2s, I get no lock until I touch the teleporter even the lightest touch on an insulated section of the circuit board causes the dac to lock and sound fine. I don't think this is a mechanical issue such as a dry joint as I barley have to touch the board and it was working fine with the B11. Befor the change to B111 there was an Otto between the teleporter and Dac

Many thanks

Steve

Shared album - Steve Preston - Google Photos

Shared album - Steve Preston - Google Photos

 

[BrianDonegan]

Does the same thing happen if you touch the Teleporter with an insulated object (wood stick)?

 

[spresto9]

Hi Brian,
Thanks for answering, I don't even need to touch the teleporter just hovering my finger 1mm from the back of the board causes a lock!

Steve

 

[BrianDonegan]

Hi Brian,
Thanks for answering, I don't even need to touch the teleporter just hovering my finger 1mm from the back of the board causes a lock!

Steve

That's capacitance I think. You seem to have built a touch control device 🙂

Do you have a ground connection between the DAC and the Teleporter? I only see the three signal lines.

 

[spresto9]

Its my magic touch..........
Only power ground
Steve

 

[BrianDonegan]

Its my magic touch..........
Only power ground
Steve

Try adding a signal ground and see if that fixes it.

 

[spresto9]

Thanks Brian will give that a try tomorrow, I'll let you know how it goes.
Sounds great by the way, not sure why its better than B11 but more musical especially on live music.
Steve

 

[spresto9]

Hi Brian
sorry, where do I conect signal ground on the Teleporter?
Steve

 

[BrianDonegan]

Hi Brian
sorry, where do I conect signal ground on the Teleporter?
Steve

There are ground connection pads next to the output signal pads. Just connect one to the B3Pro input GND pad.

 

[spresto9]

Thanks Brian
the ground seems to have done the trick, cheers.
Steve