Marantz CD63 & CD67 mods list - Page 97

Fidelity Audio · 24th February 2006, 10:15 AM

Quote:

Originally posted by awpagan

they are using pcm****'s
very hard to read

have you got the schematic of how the used the HDAM's

looking at using passive filter to fet buffer.

have you seen the D1 output?

allan

PCM1716

awpagan · 24th February 2006, 10:39 AM

Quote:

Originally posted by rowemeister

PCM1716

hmmm
digital filter built-in

allan

awpagan · 24th February 2006, 10:45 AM

rowemeister
send me an email and i'll email you

allan
ray would be interested in this version HDAM

Fidelity Audio · 24th February 2006, 10:47 AM

I can't email you allen, it says you don't accept them from forums.

Send me one mate from my link

PCM1716

ashok · 24th February 2006, 11:01 AM

I have a CD17-MkII.
When the machine is in pause mode I get significant noise on my mV meter. However it is not audible. RF trash ? Shouldn't the output be in the mute state ?
Cheers,
Ashok.

philpoole · 24th February 2006, 11:05 AM

Great summary Rowemeister! Nice one.

Looking at the CD17 schematic, can I assume that, like the DAC in the cd63/67, the output is balanced, but this time, going into the HDAM rather than the first opamp stage?

Cheers,
Phil

Fidelity Audio · 24th February 2006, 11:15 AM

Quote:

Originally posted by philpoole
Great summary Rowemeister! Nice one.

Looking at the CD17 schematic, can I assume that, like the DAC in the cd63/67, the output is balanced, but this time, going into the HDAM rather than the first opamp stage?

Cheers,
Phil

The PCM1716 has built in filter so basicaly the op amp is in the DAC. It uses Burr Brown sound plus technology which is used in the OPA2134 op amp

Fidelity Audio · 24th February 2006, 11:17 AM

Quote:

Originally posted by ashok
I have a CD17-MkII.
When the machine is in pause mode I get significant noise on my mV meter. However it is not audible. RF trash ? Shouldn't the output be in the mute state ?
Cheers,
Ashok.

I'm sure the CD17 MKII uses different DACs and op amps (NJM2114)

Not sure on mV mate, I would have thought it was zero though

Fidelity Audio · 24th February 2006, 11:40 AM

If anyone wants some spec on the cd17 mkIII here is a nice pdf.

check out the feet

CD17 MK III pdf

poynton · 24th February 2006, 11:56 AM

Hi.

For those who want to play some more !
I found this on another thread.

" I've tried to bias I/V OPA627 in class A with 8mA (using BC107B as current source).

And... sound improves "

FET would be better than BC107.

Andy

24th February 2006, 10:45 AM	#963
awpagan diyAudio Member Join Date: Nov 2004 Location: sydney	rowemeister send me an email and i'll email you allan ray would be interested in this version HDAM __________________ Indecision makes the world gone round. Maybe

24th February 2006, 10:47 AM	#964
Fidelity Audio diyAudio Member Join Date: Dec 2005 Location: Doncaster England	I can't email you allen, it says you don't accept them from forums. Send me one mate from my link PCM1716 __________________ Fidelity Audio - Home of quality products & upgrades - What HiFi 5 Star Headphone amp » Hifi World 5 Star Pre amp » HiFi Choice 5 Star Group test winner HPA-100

24th February 2006, 11:01 AM	#965
ashok diyAudio Member Join Date: Jun 2002 Location: 3RS	I have a CD17-MkII. When the machine is in pause mode I get significant noise on my mV meter. However it is not audible. RF trash ? Shouldn't the output be in the mute state ? Cheers, Ashok. __________________ AM

24th February 2006, 11:40 AM	#969
Fidelity Audio diyAudio Member Join Date: Dec 2005 Location: Doncaster England	If anyone wants some spec on the cd17 mkIII here is a nice pdf. check out the feet CD17 MK III pdf __________________ Fidelity Audio - Home of quality products & upgrades - What HiFi 5 Star Headphone amp » Hifi World 5 Star Pre amp » HiFi Choice 5 Star Group test winner HPA-100

24th February 2006, 11:56 AM	#970
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	Class A op-amps Hi. For those who want to play some more ! I found this on another thread. " I've tried to bias I/V OPA627 in class A with 8mA (using BC107B as current source). And... sound improves " FET would be better than BC107. Andy


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24th February 2006, 11:05 AM	#966
philpoole diyAudio Member Join Date: Oct 2004	Great summary Rowemeister! Nice one. Looking at the CD17 schematic, can I assume that, like the DAC in the cd63/67, the output is balanced, but this time, going into the HDAM rather than the first opamp stage? Cheers, Phil

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