Woooooops!!! It is total ten.Henrik said:You see, even I can´t count to ten at first, but of cource 10 fets in total. Ups!!!
🙂JH
2 x 42V.Henrik said:
No forced air flow. I just made number of small holes in the top plate above the location of FETs.
JH
for those who built a soz (classical one or X)
what's the output power?
is a "high power" version possible?
what's the output power?
is a "high power" version possible?
Bricolo
My XSOZ produces about 8W.
If You want more than say 15 W or so You shoud consider the Aleph-X. A high power version is possible, but take a look at this one: http://www.passdiy.com/gallery/soz-p6.htm
My XSOZ produces about 8W.
If You want more than say 15 W or so You shoud consider the Aleph-X. A high power version is possible, but take a look at this one: http://www.passdiy.com/gallery/soz-p6.htm
Short version, look at the graph that shows the output watt versus supplyvoltage in the soz-papers by Nelson.
Henrik,
Henrik,
now your new xbosoz had broken in...?
How would you describe the sound?
Was it worth the (much more) money?
Ralf
Henrik said:
Henrik,
now your new xbosoz had broken in...?
How would you describe the sound?
Was it worth the (much more) money?
Ralf
Ralf
It certainly has, all I need now is to stay sober through out the day and do some seriously unbiased listening tests.
I will be back soon.
It certainly has, all I need now is to stay sober through out the day and do some seriously unbiased listening tests.
I will be back soon.
Hi all
Ralf, I replied to you yesterday, that my XBOSOZ was broken in.
But to day I am not so shure.
Scematic: http://www.diyaudio.com/forums/showthread.php?threadid=3949&pagenumber=17
Difference between my testsetup and my final is:
1) Coupeling caps changed from BlackGate Standard 47uF/50V to BlackGate typ N 47uF/50V (non-polarized).
2) Input- feedback- and input to ground resistors changed from Beyslag 1 Watt (reasonable good sounding resistor) to Audionote Tantalum resistors 1 Watt.
The drain and source resistors is changed from Yaego 2W to Holco MP930 resistors.
The rest of the resistors is unchanged, Audionote Tantaluresistors 1Watt.
In the Powersupply I have some Beyslag 1W and some Panasonic 1W.
3) Wirering on varoboards, connections between veroboards, attenuater and RCA plugs (except fom short wiring on input veroboard) is changed from thin silverplated solid ofc cobber isolated with teflon called Stripline (product from LCAudio) to 1mm Ø solid ofc cobbercore without isolation, stripped some Tara Labs Loudspeaker cable.
4) The testsetup´s feedbackloop were shortend from 35 cm(14 inches) to nothing more than the parts length say 10 cm (4 inches).
5) Changed the psu from BJT to Mosfets and made it a "virtual battery" suppliy like the PSU from Andrea Ciuffoli´s Powerfollower99. (This almost remooved the turn on thump).
The improvements here and now don´t comes near to those from the X feedback, not what so ever.
"Was it worth the (much more) money" it is hard to tell Ralf. For me I think it is, and since Nelson´s Idears are free (bless his soul) I feel good to pay some more for this, and if You compare the time spent on this project, it´s peanuts.
But on the other hand, build these constructions on surplus and reasonable parts and I am shure You will end op with some real good sound anyway.
The very day I finished my new and final setup, I wrote "Hi all, I have just changed my test-XBOSOZ into a new and better XBSOZ" and "The sound is verry different from my testsetup".
When I fired up my new XBOSOZ it certainly was different, not only for the better:
Tighter bottom but less deatail in mid and high frequensies.
The 3D quality: deapth, wideness, highth, focus and space in the soundstage was remarkable poorer.
The little hardness from the testsetup in the upper mid and higth dissapeered, the sound became smoother.
But since I know that the 47uF/50v BlackGate type N coupeling caps has an ideling time at 50 hours, I told my self to calm down.
After about 30 hours ideling I felt much better when listening to my cd´s and records.
After 50 hours of ideling the sound changed again, and again after 30 more hours.
The impact from the BG N´s under the ideling process has been outrages.
Yesterday, after 80 hours ideling, I listend to to the amp most of the day, and my conclusion is:
Still tighter bottom but now more detail in upper mid and hight. Specially acustic instruments and vocals is well defined. In my testsetup vocals like Leonard Choen and Tom Waits often tended to be a little too hard and tense, I had to move my listening position a little back to avoid their attack, now I have moved listeningposition back and they are now more relaxed and focused and they so to speak stayes inside the the more homogeneous soundstage where they belong.
The sound is more relaxed and detailed, wich makes some cymbals on "Talking Timbuktu" of Ali Farka Toure and Ry Cooder outstanding, almost as if they extended their vibrant form from the rap-center of the drumstick to fade out in a gracefull horizontal movement throughout the whole room, hanging there for a while and then dissapear without any traces or echoes. This is a very nice and detalied representation.
In general, the dynamic is also a little better all over the spectrum.
After these 80 hours of ideling, I have a feeling, that this process still might not be over, so it coud happen that the balance or all acpects may improove even more. Time will tell.
Ralf, I replied to you yesterday, that my XBOSOZ was broken in.
But to day I am not so shure.
Scematic: http://www.diyaudio.com/forums/showthread.php?threadid=3949&pagenumber=17
Difference between my testsetup and my final is:
1) Coupeling caps changed from BlackGate Standard 47uF/50V to BlackGate typ N 47uF/50V (non-polarized).
2) Input- feedback- and input to ground resistors changed from Beyslag 1 Watt (reasonable good sounding resistor) to Audionote Tantalum resistors 1 Watt.
The drain and source resistors is changed from Yaego 2W to Holco MP930 resistors.
The rest of the resistors is unchanged, Audionote Tantaluresistors 1Watt.
In the Powersupply I have some Beyslag 1W and some Panasonic 1W.
3) Wirering on varoboards, connections between veroboards, attenuater and RCA plugs (except fom short wiring on input veroboard) is changed from thin silverplated solid ofc cobber isolated with teflon called Stripline (product from LCAudio) to 1mm Ø solid ofc cobbercore without isolation, stripped some Tara Labs Loudspeaker cable.
4) The testsetup´s feedbackloop were shortend from 35 cm(14 inches) to nothing more than the parts length say 10 cm (4 inches).
5) Changed the psu from BJT to Mosfets and made it a "virtual battery" suppliy like the PSU from Andrea Ciuffoli´s Powerfollower99. (This almost remooved the turn on thump).
Because the nature of the changes I have just described, it is hard to tell wich role the different changes played in the entire improvements.
The improvements here and now don´t comes near to those from the X feedback, not what so ever.
"Was it worth the (much more) money" it is hard to tell Ralf. For me I think it is, and since Nelson´s Idears are free (bless his soul) I feel good to pay some more for this, and if You compare the time spent on this project, it´s peanuts.
But on the other hand, build these constructions on surplus and reasonable parts and I am shure You will end op with some real good sound anyway.
The very day I finished my new and final setup, I wrote "Hi all, I have just changed my test-XBOSOZ into a new and better XBSOZ" and "The sound is verry different from my testsetup".
When I fired up my new XBOSOZ it certainly was different, not only for the better:
Tighter bottom but less deatail in mid and high frequensies.
The 3D quality: deapth, wideness, highth, focus and space in the soundstage was remarkable poorer.
The little hardness from the testsetup in the upper mid and higth dissapeered, the sound became smoother.
But since I know that the 47uF/50v BlackGate type N coupeling caps has an ideling time at 50 hours, I told my self to calm down.
After about 30 hours ideling I felt much better when listening to my cd´s and records.
After 50 hours of ideling the sound changed again, and again after 30 more hours.
The impact from the BG N´s under the ideling process has been outrages.
Yesterday, after 80 hours ideling, I listend to to the amp most of the day, and my conclusion is:
Still tighter bottom but now more detail in upper mid and hight. Specially acustic instruments and vocals is well defined. In my testsetup vocals like Leonard Choen and Tom Waits often tended to be a little too hard and tense, I had to move my listening position a little back to avoid their attack, now I have moved listeningposition back and they are now more relaxed and focused and they so to speak stayes inside the the more homogeneous soundstage where they belong.
The sound is more relaxed and detailed, wich makes some cymbals on "Talking Timbuktu" of Ali Farka Toure and Ry Cooder outstanding, almost as if they extended their vibrant form from the rap-center of the drumstick to fade out in a gracefull horizontal movement throughout the whole room, hanging there for a while and then dissapear without any traces or echoes. This is a very nice and detalied representation.
In general, the dynamic is also a little better all over the spectrum.
After these 80 hours of ideling, I have a feeling, that this process still might not be over, so it coud happen that the balance or all acpects may improove even more. Time will tell.
Ralf
I am looking forward to read about Your Aleph-X when You have finished it.
Happy New Year!🙂
I am looking forward to read about Your Aleph-X when You have finished it.
Happy New Year!🙂
Henrik: I'm trying to understand the differences between SOZ and X-SOZ; but it's quite difficult, since many things have changed
Can you explain me the reason of every change made to the original SOZ shematic? (resistor add, value changed...)
Thanks a lot
Can you explain me the reason of every change made to the original SOZ shematic? (resistor add, value changed...)
Thanks a lot
strasbourg
Nice to comunicate with fanatics all around the world - internet life high..
Ralf
...years ago i was in the dome (Munster) of Strasbourg - very impressive..Bricolo said:
Nice to comunicate with fanatics all around the world - internet life high..
Ralf
Henrik,
Henrik,
i fear it will take a while with the aleph x. (it`s not as easy to build p2p as XSOZ). The parts have arrived me, but i build a CD Player in the moment, too, which also takes much time....
Ralf
Henrik said:
Henrik,
i fear it will take a while with the aleph x. (it`s not as easy to build p2p as XSOZ). The parts have arrived me, but i build a CD Player in the moment, too, which also takes much time....
Ralf
Bricolo
If You look at the original scematic of the SOZ and compare it with my version of XSOZ, then You will know the difference.
To fully understand the X thing is something else, You can read about it in Nelsons patent, but it can be hard to understand.
If I can explain it in other way than NP did in the patent I will post it, and then we will se if my understanding is correct. Funny, nobody has yet given the fully logical explanation in laymans word, if somebody has, let me know.
If You look at the original scematic of the SOZ and compare it with my version of XSOZ, then You will know the difference.
To fully understand the X thing is something else, You can read about it in Nelsons patent, but it can be hard to understand.
If I can explain it in other way than NP did in the patent I will post it, and then we will se if my understanding is correct. Funny, nobody has yet given the fully logical explanation in laymans word, if somebody has, let me know.