Marantz CD63 & CD67 mods list - Page 548 - diyAudio
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Old 26th January 2007, 07:59 AM   #5471
AndrewT is offline AndrewT  Scotland
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Hi Young,
can you confirm what you have finally used to achieve that 4.95Vdc output?

Edit,
What did you actually use that gave the successful result?

That ref to excess current through the zeners is wrong. The current through the Zeners is limited to the regulator current + the resistor out to adjust (1.25/100)
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Old 26th January 2007, 08:03 AM   #5472
YoungSC is offline YoungSC  Australia
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Same as the Super-Raygulators, except in the 5V output version I've used two 1N4148's in series instead of just one to get the required voltage.

The 12V version doesn't need this extra part.

I think the Zeners in the 5V version draw a lot of current, so you need the extra diode to make the difference.

Simon
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Old 26th January 2007, 08:09 AM   #5473
Chivvyp is offline Chivvyp  United Kingdom
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Quote:
Originally posted by imperfectcircle

Im definitly interested! Ill email the guy that sells them and ask if they are still available. If not we will have to figure something else out. Is anyone else interested in this at all?? If we get some interest in it maybe we can put our heads together and come up with something Im very interested in using the cd67 as a stand alone DAC for my PC. Anyone know if you would still have to press play to get sound out of it if your not using the cd transport? Or does the play button just control the transport? Where would we hook up the I2s output in the cd67? Ill let you guys know what I find out.
thanks
Hi,

I believe the I2S feed goes through RD11 (DATA), RD12 (SCLK), RD13 (WCLK) on the 63.

R501,2,3 on the CD67 I think but you'd need to trace from pins 45,46 and 48 on the SAA7372 to be sure.

Incidentally, I've also read about lifting these 3 resistors and feeding through a TDA1543 to make the marantz nonoversampling. It's something I might try if I can get hold of a TDA1543 cheaply (evidently stacking 8-10 of them gives a very good result).

You/d have to be careful when using the Marantx as a transport not to disconnect anything (like clock disconnects between clock and chip) which give focus errors or similar and stop the machine functioning.

Regards

Pete
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Old 26th January 2007, 10:25 AM   #5474
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Hi there!

First, I've now a gain at my Hphones opamp of... 1! So It's almot useless here, is it ok to remove all? I mean bypass all hphones pcb (and remove stuff) and wire from C901/C902 (removed) to J901. Then may C980 be upgraded for sound?

Second, we have an exclusive Nora Jones performance on one of our biggest radio here, I'll try to record it at CD's PCM specs. Does some want it?

Thanks for hphones answer
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Old 26th January 2007, 10:32 AM   #5475
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No sure how many of you have improved your mains whether it be with a new lead or using such items as Russ Andrews sells.

Well I have stripped down the Mini Purifier (150)

Click the image to open in full size.

What did suprise me was the lower component count and less filtering capabilities it had compared to my own Ultra plug (65). Some over pricing there I think!!!

No Noise Ultra piccy (note:- pic is from development stage, some parts have changed)

Click the image to open in full size.

Brent

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Old 26th January 2007, 10:42 AM   #5476
poynton is offline poynton  United Kingdom
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150pounds does seem alot of money for a box, 4 caps, 3 resistors, 1 vdr and a diode (?)


Did you ever find out what the 'Toffee' was ??

Andy
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Old 26th January 2007, 10:50 AM   #5477
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Hi Andy

Of course some of the cost is R&D and time to build but its just as quick to build that as his Silencer plug. So yes its over priced. It takes me a good 30 mins (and i'm efficient at it) to build ours.

The diode is a transient diode.

The Toffee is an unknown quantity at the moment, I have feelers out all over the place and nobody knows what it actually is.

As a company we are trying to get similar products out to people at much more sensible prices. These plugs do work but paying hundreds of pounds for a few plugs makes it hard to part with your cash. These prices put people off from even trying such a product.

Brent
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Old 26th January 2007, 11:43 AM   #5478
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Yes, and have you ever checked what idly lumping capacitance across the mains can do? It makes things worse! See the 'Dont' try this at home' section here:

http://www.acoustica.org.uk/other/filter.html

PS - this was on a socket thats a spur just 600mm from my consumer unit (100A service). Things will be even worse on longer mains runs
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Old 26th January 2007, 11:54 AM   #5479
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Fitting an inductor is the worst thing you can do! it adds inductance for starters.
Also and LC circuit reacts differently to a capacitor only circuit.

Fitting caps across L-N does cause a small phase shift but this is not a problem.

SerCals and Russ Andrews plugs are parallel filters, series filters add their own problems.

Brent
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Old 26th January 2007, 12:02 PM   #5480
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Yes but did you look at the plot lower down - simply adding 'parallel filters' - i.e. only capacitance L-N - increases noise on the line.

Its almost exactly the same problem as bypassing caps with small ones of other types - you get unpredicted resonances, in this case firmly inside the audioband. It's not a panacea...
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