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Old 2nd May 2013, 05:37 PM   #671
marce is offline marce  United Kingdom
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Looks cool, and nice to see something other than the standard box.:0
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Old 2nd May 2013, 05:42 PM   #672
ecdesigns is offline ecdesigns  Netherlands
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Hi jean-paul,

Quote:
BTW John, are those RCA/cinch sockets in the ISDV1 not too close to the transformers ?
The ISDV1-player is experimental.

The sockets on the rear were intended for AUX input and when they are connected I use screening tubes that fully screen the RCA socket pin and attached interlink.

Connections between SDV1-player and power amp modules are hard-wired and don't come even close to the transformers.

The final products are separate units as can be seen on my new website. Two separate monoblocks and a separate SDV1-player.

The SDV1-player is always powered by an external 12V DC power supply, even for the experimental ISDV1-player.
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Old 22nd September 2013, 02:39 PM   #673
maxlorenz is offline maxlorenz  Chile
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Hi -EC-

A couple of questions:

You declared you are using another DAC chip for improved sound...did the output circuit (I/V) also changed?

With my present SD card reader I have troubles with random playing of orderly tracks: is your SD1 free of these troubles?

Thanks.
M.

SP: QLS launched an SD player that has opamps at the output, and I am (you have me) accustomed to passive or discrete JFET outputs...
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Last edited by maxlorenz; 22nd September 2013 at 02:44 PM.
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Old 22nd September 2013, 03:20 PM   #674
Onnosr is offline Onnosr  Netherlands
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Hi EC

What type of DAC chip you are using now ??

Onno
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Old 29th October 2013, 09:02 AM   #675
ecdesigns is offline ecdesigns  Netherlands
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Hi maxlorenz,

Quote:
You declared you are using another DAC chip for improved sound...did the output circuit (I/V) also changed?
The DAC chip was changed in order to realise lowest possible DAC chip jitter contribution in combination with active jitter control.

The I/V circuit consists of a 250MHz current buffer (meets DAC chip output compliance) that drives a variable, passive I/V resistor.

Output is DC-coupled in order to maintain transparent sound.

Quote:
With my present SD card reader I have troubles with random playing of orderly tracks: is your SD1 free of these troubles?
The SDV1-player supports both, disc and track shuffle these work fine.
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Old 29th October 2013, 09:53 AM   #676
ecdesigns is offline ecdesigns  Netherlands
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Hi onno,

Quote:
What type of DAC chip you are using now ??
I am using a selected multibit DAC chip in the final SDV1-player.
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Old 29th October 2013, 10:17 AM   #677
maxlorenz is offline maxlorenz  Chile
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Quote:
Originally Posted by -ecdesigns- View Post
Hi maxlorenz,

The DAC chip was changed in order to realise lowest possible DAC chip jitter contribution in combination with active jitter control.

The I/V circuit consists of a 250MHz current buffer (meets DAC chip output compliance) that drives a variable, passive I/V resistor.

Output is DC-coupled in order to maintain transparent sound.



The SDV1-player supports both, disc and track shuffle these work fine.
Thank you very much for your reply, dear -EC-.
So no opamps...

About the tracks, I didn't explained well my trouble: my reader disorders orderly tracks without reason.

Cheers,
M.
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