Finally, an affordable CD Transport: the Shigaclone story - Page 400

jonners · 15th March 2010, 09:13 PM

Quote:

Originally Posted by BMW850

Jvc-rcez31 jvc-rcez32 jvc-rcez51

The EZ32 is not entirely compatible - apparently it takes a lot of extra work. See the posts by kevinkr.

woodturner-fran · 15th March 2010, 09:41 PM

As jonners said: you can make the EZ32 work but it ain't easy. Go for the 31 or 51 only.

Fran

johnm · 16th March 2010, 06:28 PM

Whilst waiting for parts to arrive so I can build the re-clocking board mentioned a few pages back in this thread, I stumbled upon this review of a CEC TL-1X transport:

CEC TL-1X

Looks to have more or less than same digital output board as Peter's TL0, but with the addition of an optical receiver too.

Scroll down about halfway and you can see the awful trace put out by the SPDIF signal from this board - this guy gets far better results from using the digital output 'direct' from the board and bypassing the output board.

Has anyone experienced a lack of bass who's DIY'd version of the CEC style digital output?

Cheers,

- John

Peter Daniel · 16th March 2010, 07:34 PM

The Lampizator was wrong: Suggestions please: Improving motor CEC (Mabuchi)

woodturner-fran · 16th March 2010, 09:01 PM

I did the mod and the bass is actually far far better - as are the highs. Well worth doing, one of the best mods of all.

Fran

johnm · 16th March 2010, 09:34 PM

Just read that thread - whew! Nice to know this was just a case of a faulty test then (one hope's he'll update his pages to reflect this...).

Looking forward to trying out this CEC-style reclocking board on my Shiga once the chips arrive. Only difference is I'll do it without the pulse transformer and instead use the 300/100 resistors. There's already a pulse transformer on the input of my DAC at any rate. Have heard many people don't like using pulse transformers, so I guess this is another avenue to experiment with.

- John

audio1st · 17th March 2010, 12:11 PM

Yes I also prefere mine with the added re-clock circuit.. No pulse transformer with mine and I changed the output resisitors to 150/150 because the output was lower with the extra circuit..

johnm · 17th March 2010, 12:15 PM

Wow I love that diagram - you must be a whiz at Photoshop? I'm currently doing an evening class studying beginners Photoshop actually, though will be a while before I produce work like that! Really helpful and makes it near enough foolproof to put one of these boards together - thanks!

Just curious why there's only one 33uF cap providing decoupling to both chips, whereas on the CEC circuit diagram I believe there is one cap per chip?

- John

johnm · 02:37 PM

P.S. I've probably missed a post somewhere that explains this, but according to Peter's circuit, plus Audio1st's, the digital output comes from pin 9 of the 74AS74. However according to the original CEC schematic it appears to come from pin 8...

Have I missed something?

Peter Daniel · 17th March 2010, 03:08 PM

I went with the actual CEC board, and the output comes from pin9, see post #12: The CD Transport

16th March 2010, 07:34 PM	#3994
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	The Lampizator was wrong: Suggestions please: Improving motor CEC (Mabuchi) __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

17th March 2010, 02:23 PM	#3999
johnm diyAudio Member Join Date: Sep 2003 Location: Hampshire	P.S. I've probably missed a post somewhere that explains this, but according to Peter's circuit, plus Audio1st's, the digital output comes from pin 9 of the 74AS74. However according to the original CEC schematic it appears to come from pin 8... Have I missed something? Last edited by johnm; 17th March 2010 at 02:37 PM.

17th March 2010, 03:08 PM	#4000
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	I went with the actual CEC board, and the output comes from pin9, see post #12: The CD Transport __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

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15th March 2010, 09:41 PM	#3992
woodturner-fran diyAudio Member Join Date: Jan 2006 Location: Ireland	As jonners said: you can make the EZ32 work but it ain't easy. Go for the 31 or 51 only. Fran

16th March 2010, 06:28 PM	#3993
johnm diyAudio Member Join Date: Sep 2003 Location: Hampshire	Whilst waiting for parts to arrive so I can build the re-clocking board mentioned a few pages back in this thread, I stumbled upon this review of a CEC TL-1X transport: CEC TL-1X Looks to have more or less than same digital output board as Peter's TL0, but with the addition of an optical receiver too. Scroll down about halfway and you can see the awful trace put out by the SPDIF signal from this board - this guy gets far better results from using the digital output 'direct' from the board and bypassing the output board. Has anyone experienced a lack of bass who's DIY'd version of the CEC style digital output? Cheers, - John

16th March 2010, 09:01 PM	#3995
woodturner-fran diyAudio Member Join Date: Jan 2006 Location: Ireland	I did the mod and the bass is actually far far better - as are the highs. Well worth doing, one of the best mods of all. Fran

16th March 2010, 09:34 PM	#3996
johnm diyAudio Member Join Date: Sep 2003 Location: Hampshire	Just read that thread - whew! Nice to know this was just a case of a faulty test then (one hope's he'll update his pages to reflect this...). Looking forward to trying out this CEC-style reclocking board on my Shiga once the chips arrive. Only difference is I'll do it without the pulse transformer and instead use the 300/100 resistors. There's already a pulse transformer on the input of my DAC at any rate. Have heard many people don't like using pulse transformers, so I guess this is another avenue to experiment with. - John

17th March 2010, 12:15 PM	#3998
johnm diyAudio Member Join Date: Sep 2003 Location: Hampshire	Wow I love that diagram - you must be a whiz at Photoshop? I'm currently doing an evening class studying beginners Photoshop actually, though will be a while before I produce work like that! Really helpful and makes it near enough foolproof to put one of these boards together - thanks! Just curious why there's only one 33uF cap providing decoupling to both chips, whereas on the CEC circuit diagram I believe there is one cap per chip? - John