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In Reply to: RE: Inline adapters ... are they useful ? posted by beppe61 on July 10, 2014 at 11:25:09
a 75 Ohm to 110 Ohm converter using a small toroid transformer. Sounds OK
Follow Ups:
Hi and thanks for the valuable reply
My main concern is to ruin to source
From the schematic i see that pin 1 of the XLR is grounded and 2 and 2 connected to the primary of the transformer
Does this ruin the source ?
And where to put it .. after the dac or after the preamp ?
But above all i would not ruin the equipment with something like a short circuit between phase + and pahse -
But i like the ground isolation provided very very much.
I have ground problems ... i am sure of this
Because if i short the preamp inputs there is no noise to speak of.
If i connect the source ... tac ! i have noise ... very disturbing
Thanks again.
Kind regards,
bg
Unless I am mistaken on your unit, this is for converting 75R 0.5V digital
to AES/EBU 110R voltage level for use as input to a dac. It is not meant to be usede after a preamp or in the analog line.
Hi and thanks again
Now i understand it is not for me. I would like to separate source and preamp grounds, like for instance a coupling transformer does.
Unfortunately i have not a scope to see the quality of noise coming from the source but i think it is ground related.
But i have decided to do differently
I will get galvanic separation by means of an optical cable between the source and the dac.
I want to get rid of noise ... perfect silent and the music above.
Thanks again.
Kind regards,
bg
Do not ground source and use one point grounding at the last destination
Hi and thanks again for the very kind and valuable advice.
It has helped me to understand that i should not go this way.
I will use a toslink connection to achieve galvanic separation of the source. I will loose maybe somtething with an optical cable, but i need to isolate.
Thanks again.
Kind regards,
bg
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