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Marantz CD63 & CD67 mods list
Marantz CD63 & CD67 mods list
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Old 12th September 2011, 11:01 PM   #17421
andrewjameshoward is offline andrewjameshoward  United Kingdom
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You mean an L78S05CV - same as a 7805?
2A Positive Fixed Voltage Regulators : Voltage Regulators : Maplin
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Old 13th September 2011, 09:37 AM   #17422
Ben Hanke is offline Ben Hanke  Canada
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I fitted two of my shiny 5v 317 regs on the analogue pins of my DAC this evening, with really great results. The analogue pins were a bit tricker to do than the digital ones because I had to remove some caps to get at those undocumented wire bridges. That's why I chose to do the analogue first, even though I know the digital probably needs it most. I can't play loud because it's late, but everything seems to sound clearer as far as I can tell so far. Unfortunately, my display/button ribbon has finally decided to start being temperamental. It took me about 15 minutes of coaxing to get it to work again. It's threatening to make routine removal of the board a bit miserable from now on unless I can fix it somehow.
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Last edited by Ben Hanke; 13th September 2011 at 09:41 AM.
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Old 13th September 2011, 05:54 PM   #17423
Ben Hanke is offline Ben Hanke  Canada
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Just received my DOS and Flea boards, thanks Ray :-D
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Modified Marantz CD63KI -> Modified PM66KI -> B&W 805S
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Old 13th September 2011, 11:07 PM   #17424
bikeral10 is offline bikeral10  United Kingdom
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Default regs

Quote:
Originally Posted by andrewjameshoward View Post
lm7805 ts7805 andrew any 5v fixed reg will do .
de solder pump and a good iron .
away you go .
regards alan


any probs always some very helpful ppl on here
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Last edited by bikeral10; 13th September 2011 at 11:16 PM. Reason: more info
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Old 15th September 2011, 07:40 AM   #17425
Ben Hanke is offline Ben Hanke  Canada
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Hello everyone, it's very quiet in here.

I'm still really enjoying the benefits of adding new regulators to the analogue supply of my DAC chip. It sounds much cleaner, smoother and more detailed. Stereo imaging seems much better too. I can't imagine what performance you guys with loads of SPowers must get. I'm thinking of building a few more of these regs and fitting them to all the 5v chip supplies. Thanks Martin Clark, NAD, Ray and everyone else who helped out with that one - much harder than simply swapping caps, but seriously worth it.

I'd love to hear how people are getting on with their new DOS builds. It's quiet so it must be good. I have my PCB and Black Gates in the bank, but I think it's going to be a while before I get to start on mine.

Cheers,

Ben
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Old 15th September 2011, 09:25 AM   #17426
UV101 is offline UV101  England
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No time to build yet!!!

Was too busy having and recovering from my 40th plus trying to find another car (after the M3 went lol).

I want to build mine up with decent components too so I may order from partsconnexion :-) tempted to try those Z-Foil resistors on the filter stage but having a hard time justifying the cost!!
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Old 15th September 2011, 02:48 PM   #17427
gareth is offline gareth  Wales
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Hi Guys,

I was wonder ing if Ray 6h5c was on line. I had been promising a schematic for a clock for the 63 and wanted him to take a look at it for me and give his opinion and maybe run a couple of simulations.

Does anybody know what format and file size I have to use to get a copy of the schematic put up on this post ??????????

Any ideas.... .jpg, .gif or what ?

Cheers gents
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Old 15th September 2011, 08:33 PM   #17428
Fidelity Audio is offline Fidelity Audio  England
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My dos is still running in. Up to now it is not has linear or as analogue as my previous board. More bass weight has come out of it over the last 24 hours but am finding piano to be a bit shrill. After the weekend I'll make another judgement and tweak were necessary.

Brent
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Old 16th September 2011, 02:41 PM   #17429
UV101 is offline UV101  England
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The original version of the DOS was very very good especially with a good PSU and regs. I'm also building mine up with Mica and styrene caps on the filter section. I've used mica caps in filters before with excellent results. I've gone for rc55y resistors in the end. Hopefully it'll be better. If not, I also got one of the last original DOS boards to play with ;-)
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Old 16th September 2011, 02:49 PM   #17430
Fidelity Audio is offline Fidelity Audio  England
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I listened some more last night and simply could not listen to it. So I brought it into work today for a play.

Firstly I messed around with the CCS by altering the current. I ranged it from 3.5mA up to 15mA and the sound character never really changed. I had to try different fets to get the more extreme mA. In the end I decided to remove the CCS and fit a 1K8 0.1% RC55Y from my old DOS. Straight away the whole spectrum of sound changed, more fluid, deeper and rhythmic bass, no peaks in the upper mids (around piano keys etc). Pretty much as it used to be.

I'll test this over the weekend properly and will be able to hear what the CFP is doing over my old dos.

I will add a note to say I have not come to my final conclusion yet but if anyone has bought or is thinking of buying this new dos pcb do so. It is still a cracking design and it is easy to alter if need be. Much easier to alter than the early pcbs.

Brent

Last edited by Fidelity Audio; 16th September 2011 at 02:54 PM.
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