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Old 23rd December 2011, 03:28 PM   #3821
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That´s what i thought. You already have a PSU that works.
"Ges" is part of "Gesamt" and that means : all things in total. Gesamtkunstwerk is an old (german?) artistic concept. For example you build a house and also design all the furniture and the paintings on the wall are also made by you. One example could also be the cathedral in Cologne.
Gaudi did thinks like that in spain or McIntosh in scotland. I am not intimate familiar with the portuguese art scene
though.
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Old 23rd December 2011, 03:51 PM   #3822
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Today the last exotic parts arrived so i was able to finish the main boards of the Opus Magnum. It is also a bipolar design with current mirrors though very different from the Paradise. We are in good neighborhood though.
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Old 23rd December 2011, 04:13 PM   #3823
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The BC327/337 and the ultra low noise Sanyos have arrived. I measured Hfe in some random chosen BC´s and it is around 300 in the NPNs and 500 in the PNPs. This is a rare case that the PNPs are stronger. When i look at the printing they are from the same manufacturer.
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File Type: jpg Sanyo Ultra low Noise.jpg (130.6 KB, 263 views)
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Old 23rd December 2011, 05:18 PM   #3824
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Looks like Reichelt stuff...?
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Old 23rd December 2011, 06:00 PM   #3825
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by Joachim Gerhard View Post
That´s what i thought. You already have a PSU that works.
"Ges" is part of "Gesamt" and that means : all things in total. Gesamtkunstwerk is an old (german?) artistic concept. For example you build a house and also design all the furniture and the paintings on the wall are also made by you. One example could also be the cathedral in Cologne.
Gaudi did thinks like that in spain or McIntosh in scotland. I am not intimate familiar with the portuguese art scene
though.
Now I understand. I know Gaudi´s work and also other artists that extend their work to the complete build so we can taste a "familiar" and more or less homogeneous environment. I do not know any Portuguese artist that produced in such a way. The most proeminent PT artists are writers.
The great constructions in existance where built during the monarchic era when pt sailors found new territories and brought back all kinds of goods.
They also brought new ideas and workers from all over the world so these grand buildings have a mixture of trends.

IMO in any electronic circuit, the PSU is quite important. Not only does it matter in low PSRR analog circuits but also in more complex structures like those using opamps, dac´s, decoders etc.

Just for learning purposes, I want to experiment the very complex Paradise with different PSU´s and verify if there are any differences.

I am not trying to mystify or in any way modify the original design and in the end I believe I will keep the dedicated PSU designed here, but I want to know how my last hot rod shunt PSU behaves.

I am still working in my layout but as I only have small veroboards and due to the extreme complexity of the design I guess I will not be able to do it p2p before the boards are ready...
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File Type: jpg EXPPCB Paradise.jpg (259.7 KB, 264 views)
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Last edited by RCruz; 23rd December 2011 at 06:05 PM.
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Old 23rd December 2011, 06:11 PM   #3826
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Yes, Holger, when i can i buy from Reichelt. They have a good selection of japanese transistors. No luck with recent 2SJ74 though. They where all GR grade. Useful for constant current sources.
The other vendors i buy from are Schuro, Digikey ( best with Panasonic and american Opamps ), Mouser ( good selection of Mil.Spec. resistors ), Distrelec ( Rifa-Evox PPS ) and Bürklin ( Frolyth caps ).
Yes, Ricardo, i would wait for the boards. Even i have no desire to build it p2p.
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Old 23rd December 2011, 06:13 PM   #3827
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Your PSU experiments are most welcome. Just do not bug me when it does not work (:
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Old 23rd December 2011, 06:20 PM   #3828
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Rüdiger, did you get my PM ?
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Old 24th December 2011, 09:08 AM   #3829
hesener is online now hesener  Germany
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Originally Posted by RCruz View Post

I am still working in my layout but as I only have small veroboards and due to the extreme complexity of the design I guess I will not be able to do it p2p before the boards are ready...
Hi Ricardo,
thanks for posting your layout, looks good and inspiring! on perfboards you do have some degrees of freedom that dont exist on pcbs, especially for ground and power routing. in fact, I am looking into the ground routing right now, goal is to have a star ground at the input, to not ¨contaminate¨the ground returns from the caps and the RIAA network so those will have separate return paths. if i find the space i will put add`l connectors for external power supplies, but don`t bet on it. also, with these current mirrors the impact of different power supplies should be far less than in single-ended topologies for example....

merry christmas to you all, this has been a fascinating and exciting thread! thanks especially to joachim for all the inspiration and insight!
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Old 24th December 2011, 10:25 AM   #3830
MiiB is offline MiiB  Denmark
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I would route the pcb with two groundplanes one that includes the powersupply and the internal 15V area and one where the sigal is. The two planes can then be jumper connected...or gnd resistor connected...this will create the star on star youre looking for...and at the same time make the layout much simpler...
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