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Old 8th January 2020, 03:01 PM   #1
spresto9 is offline spresto9  United Kingdom
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Default B 111 se upgrade lock problem.

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

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Last edited by spresto9; 9th January 2020 at 03:44 PM. Reason: add photo
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Old 10th January 2020, 03:47 PM   #2
BrianDonegan is offline BrianDonegan  United States
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B 111 se upgrade lock problem.
Does the same thing happen if you touch the Teleporter with an insulated object (wood stick)?
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Old 10th January 2020, 05:40 PM   #3
spresto9 is offline spresto9  United Kingdom
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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
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Old 10th January 2020, 05:59 PM   #4
BrianDonegan is offline BrianDonegan  United States
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B 111 se upgrade lock problem.
Quote:
Originally Posted by spresto9 View Post
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.
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Old 10th January 2020, 06:03 PM   #5
spresto9 is offline spresto9  United Kingdom
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Its my magic touch..........
Only power ground
Steve
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Old 10th January 2020, 06:19 PM   #6
BrianDonegan is offline BrianDonegan  United States
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B 111 se upgrade lock problem.
Quote:
Originally Posted by spresto9 View Post
Its my magic touch..........
Only power ground
Steve
Try adding a signal ground and see if that fixes it.
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Old 10th January 2020, 06:24 PM   #7
spresto9 is offline spresto9  United Kingdom
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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
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Old 10th January 2020, 06:50 PM   #8
spresto9 is offline spresto9  United Kingdom
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Hi Brian
sorry, where do I conect signal ground on the Teleporter?
Steve
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Old 10th January 2020, 06:54 PM   #9
BrianDonegan is offline BrianDonegan  United States
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B 111 se upgrade lock problem.
Quote:
Originally Posted by spresto9 View Post
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.
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Old 10th January 2020, 07:23 PM   #10
spresto9 is offline spresto9  United Kingdom
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Thanks Brian
the ground seems to have done the trick, cheers.
Steve
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