Mpp - Page 681

Joachim Gerhard · 14th August 2012, 10:32 PM

Holger, some fascinating stuff going on here...dac I/V convertion with very low distortion

RCruz · 15th August 2012, 10:38 AM

Some more numbered parts.....
Do no take me wrong... I also prefer the values in the board, but when it comes to stuff matched parts, numbers help a lot.

Bksabath · 15th August 2012, 06:00 PM

Quote:

Originally Posted by RCruz

There is a turning point... Increasing current in the CCS creates a much bigger sounstage with perceivable microdetail.

So (what am I going to start now?

) how wuld one sligtley increse current on paradise? Just a litle bit mind you.

OR maybe what is a CCS is more apropiate question.

Tweak times already

Bksabath · 15th August 2012, 06:08 PM

Constant Current Source I think (Plese remember that spanners is more my field)
So supose one got a load of 3 W 100 Homs 15 PPM Holcos to replace the 120 Homs....

Any danger of fire?

Second small tweack
I have to turn down the CD player when jumping from Black to silver disk any quick Paradise value change? (Again Just litle bit and This may aply just to my set up so academic value only)

Joachim Gerhard · 15th August 2012, 07:12 PM

The shunt in the Paradise already runs quite hot.
To change the gain ( increase ) all resistors in the RIAA have to be raised and the caps have to be lowered. Doubling the resistor values and halving the caps gives 6db more gain.
Not recommended though. Sorry guys, this is a rigid corset.

RCruz · 15th August 2012, 07:17 PM

We would need beafier heatsinks to play with larger CCS in this case.

maybe a 10db prepre would be good for you bksabath... JG is cooking something new right now !

Bksabath · 07:24 PM

Tanks Joachim
I am going to tweak the preamplifier to tame CD player (not that I use that so much) as I like the RIAA as it is.

Tanks Riccardo 10 dB prepre be over kill.
Beafier heath sink no problem....

Joachim Gerhard · 15th August 2012, 07:28 PM

I think the heat sinks are big enough to run the shunts hotter. I just would like to repeat :
first build it as is and then change if you will. You can do what you please of cause but that would give us a common point of reference.

FdW · 09:35 PM

Quote:

Originally Posted by RCruz

We would need beafier heatsinks to play with larger CCS in this case.

maybe a 10db prepre would be good for you bksabath... JG is cooking something new right now !

Do not try to feed the CVS of the CCS of the shunt

with a regulated power supply, there is a good possibility that one of them (or even both) will oscillate.

Of course the team highly recommends a passive filter using a common mode choke as discussed before, and a board was designed by Bksabath see Mpp and later.

See also Mpp
And Mpp

jacco vermeulen · 15th August 2012, 09:39 PM

Mpp

Hoplahop

15th August 2012, 07:17 PM	#6806
RCruz diyAudio Member Join Date: Sep 2006 Location: Saxon Blog Entries: 1	We would need beafier heatsinks to play with larger CCS in this case. maybe a 10db prepre would be good for you bksabath... JG is cooking something new right now ! __________________ RC

15th August 2012, 07:22 PM	#6807
Bksabath diyAudio Member Join Date: Dec 2007	Tanks Joachim I am going to tweak the preamplifier to tame CD player (not that I use that so much) as I like the RIAA as it is. Tanks Riccardo 10 dB prepre be over kill. Beafier heath sink no problem.... Last edited by Bksabath; 15th August 2012 at 07:24 PM.

15th August 2012, 09:39 PM	#6810
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, Rotterdam or Curaçao	Mpp Hoplahop __________________ Not so much,.......if it says "ZM" in the corner.

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14th August 2012, 10:32 PM	#6801
Joachim Gerhard diyAudio Member Join Date: Mar 2009	Holger, some fascinating stuff going on here...dac I/V convertion with very low distortion

15th August 2012, 06:08 PM	#6804
Bksabath diyAudio Member Join Date: Dec 2007	Constant Current Source I think (Plese remember that spanners is more my field) So supose one got a load of 3 W 100 Homs 15 PPM Holcos to replace the 120 Homs.... Any danger of fire? Second small tweack I have to turn down the CD player when jumping from Black to silver disk any quick Paradise value change? (Again Just litle bit and This may aply just to my set up so academic value only)

15th August 2012, 07:12 PM	#6805
Joachim Gerhard diyAudio Member Join Date: Mar 2009	The shunt in the Paradise already runs quite hot. To change the gain ( increase ) all resistors in the RIAA have to be raised and the caps have to be lowered. Doubling the resistor values and halving the caps gives 6db more gain. Not recommended though. Sorry guys, this is a rigid corset.

15th August 2012, 07:28 PM	#6808
Joachim Gerhard diyAudio Member Join Date: Mar 2009	I think the heat sinks are big enough to run the shunts hotter. I just would like to repeat : first build it as is and then change if you will. You can do what you please of cause but that would give us a common point of reference.