Finally, an affordable CD Transport: the Shigaclone story

[tvicol]

This is how the remote may look.
A single side PCB with all components on the copper side.

Regards,
Tibi

[uncle_leon]

Originally Posted by tvicol

...

The great news it that we were able to source a large batch of LC78601RE, maybe the last ones. :-)

Regards,
Tibi

That is splendid news indeed! The Shigaclone project evaded demise once more thanks to your efforts

[tvicol]

Short update to project status.
Today we have received the trafos.
We expect to have LCD displays delivered on 28. August
We´ll receive Shiga PCB boards on 31. August.
Remote IR boards are also in production and I expect to have them around 31. August as well.

As soon we get PCB boards we´ll start shipping for DIY and Full Shiga Kits.
Ready mounted and tested will take off in the first week of September.

Thank you for your patience and understanding.

Regards,
Tibi

[yoaudio]

Thanks Tibi for the update, we appreciate all your hard work.

[spartan]

Tibi,
A question about the 5v circuit.
If I use a separate regulator for the 5v circuit and power it with batteries, leaving the 8v circuit (reg) to be powered by a mains transformer, couldn't that introduce some grounding issues? Do you think it would be better to leave both circuits powered by the same battery supply?

[sigurd]

Hi all,
Please, I want to know if the output impedance on the DIGITAL out is about 235 Ohm? That's for calculate an ideal T-pad resistor circuit : attenuator about -10 dB and 75 Ohm output.

Thanks.

[sigurd]

Because the output impedance have a hudge influence on the soundstage 'picture' and 'linearity' , specific of character of sound on solo instruments...!

[sigurd]

I have really very good results with (after surching with all kind of possibility's ): 6K8 parrallel on direct ouput , 200 Ohm in series to output and 90 Ohm parallel to output : to now that's the best result I have , really nice !
But maybe that would be better ?
Some experiences ?

[sigurd]

6k8 to ground, 200 Ohm in series, 90 Ohm to ground : T section

[uncle_leon]

These are some interesting comments you make sigurd, but I am a bit confused as to what actual resistor layout you are using - could you draw a schematic for us, or take a picture? You are saying you have two resistors to the ground + one series, but this sounds like a Pi-pad, not a T-pad?... I'm not nitpicking, just trying to making sure I understand you correctly.

The datasheet for LC78601 doesn't state this, but the digital output impedance is most likely 75Ohm, as per S/PDIF standard. Did you try the 75Ohm Pi-pad I suggested earlier? I built one with my hand-made resistors (which were accurate to +/-0.1R), and I found it to sound far superior to the original L-pad (the detail and resolution took a leap, in particular). I have not tried any further combinations because I assumed 75Ohm should be optimal... But of course, I will be the first to admit that in the audio world theory and practise are often two different stories.