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Old 12th February 2009, 01:18 PM   #41
RCruz is offline RCruz  Switzerland
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Awesome work.

Wish I could go there and listen personally.

Ricardo
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Old 12th February 2009, 01:34 PM   #42
Malefoda is offline Malefoda  France
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You're welcome if you happen to be around
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Old 13th February 2009, 06:31 PM   #43
RCruz is offline RCruz  Switzerland
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Thank you !

Also If you happen to visit this sunny place... remenber to come and hear my evolutions.

Ricardo
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Old 22nd February 2009, 03:09 PM   #44
Malefoda is offline Malefoda  France
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An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.

Finished.
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Old 23rd February 2009, 06:07 PM   #45
RCruz is offline RCruz  Switzerland
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Another magnificent job.

How does it perform ?

Ricardo
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Old 23rd February 2009, 07:17 PM   #46
Malefoda is offline Malefoda  France
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Better dynamics and bass presence, ( PEH ? ) and since the Teflon make the input capacity value OK the whole is more fluent and natural, defo less harsh.
Usefull job, music deserve it

Let's find a Playstation now...
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Old 24th February 2009, 07:39 PM   #47
Malefoda is offline Malefoda  France
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Back : I defo love it now ! Maybe go further later for fun... and music
It's just so foot tapping !
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Old 24th February 2009, 08:34 PM   #48
Malefoda is offline Malefoda  France
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Shame we can't edit...

Where to look at now?
Blue Velvet ALPS pot?
Separated PSU for the opamp? ( 55V flows through a 2K
LM4562HA or even Burson type?
Better main PSU?

...
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Old 16th March 2009, 01:19 PM   #49
Malefoda is offline Malefoda  France
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For Ricardo:
Yes as I was waiting for the Teflon as my K40Y-9 200V were not 0.492F as sold but 0.442F (and OEM Aura was 0.470F MKCs and checked at 0.498 for one and 0.460 for the other ( don't remember well but not matched ) and I don't wanted to change that value.
First I wanted to fit just the PIOs. Then I needed to add caps to go to at least 0.470. PIO by itslef just sounds good in mids, bass and highs did not improved and my feeling is that they got less present. Less life to overall feeling.
Then the Teflon (2x 0.22F 200V for the lid space, 0.470 FT-1 Teflon are just too big ) and the good value:
I think gone from the 0.442 PIO to 0.485 PIO+FT-1 does it for the bottom, and the magic of Teflon makes the highs soooo ... just nice
As I said when you hold something good you just feel it : " OMG, that's just sooo good, don't touch anything there !! ".
before I was just asking myself is this amp was woth it, no I just love it!
But more than just that was done (remember the BHC 4700 changed for PEH169 6800 and NE55xx for LM4562 with ZA 220/35.).

The former post is still in my head, maybe a dedicated PSU for LM4562 then will go sheileded HA package... that can be quite cheap.
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Old 24th March 2009, 09:46 AM   #50
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What rectifier may I use?
Good ref or spec I should find ( such as type of rectifier, as an IC with 4 or just 4 ones no prob there ) for the purpose is to feed as much as possible the bigger caps.
Offers are also welcome guys!

Thanks
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