I'm experimenting myself with those issues. You could use plastic screws and spacers (plastic or fiberglass is not conducting heat as good as metal). But the best way is to use some non-metal spacers directly under the caps (with small area of contact). I would be interested myself what would the caps housing temp. compares now and when you decide to use spacers.
RW
If you are thinking of the unbalanced input, the - input is to go to the ground, according to my understanding.
JH
If you are thinking of the unbalanced input, the - input is to go to the ground, according to my understanding.
JH
Do not laugh please. Here is BOSOZ preliminary finished last night.
I was about to connect to XSOZV2, but I forgot to make the balanced
interface line. Therefore, no sound yet.
This is made with CCS tails, and for the unbalanced input and balance output.
In the power regulation circuit, I used IRFP240 and 9240 instead of
IRF610 and 9610. I just wanted to use the transistors I have.
JH
I was about to connect to XSOZV2, but I forgot to make the balanced
interface line. Therefore, no sound yet.
This is made with CCS tails, and for the unbalanced input and balance output.
In the power regulation circuit, I used IRFP240 and 9240 instead of
IRF610 and 9610. I just wanted to use the transistors I have.
JH
Attachments
jh6you said:
Certainly there will be no laughing from me! As a fan of point-to-point wiring, I think it looks quite lovely.
On another note, the knobs look interesting. Do they have a rubberized grip ring around them? (A little off the beaten path, but I'm always looking for distinctive hardware...)
Erik
Hi Erik
Not rubber, but actually plastic having very fine teeth. To the
aluminium-skinned knob of small diameter, it provides good grip
and smart look. Sure the knob price is also cheap.
JH
Not rubber, but actually plastic having very fine teeth. To the
aluminium-skinned knob of small diameter, it provides good grip
and smart look. Sure the knob price is also cheap.
JH
Ye...
XSOZV2 and BOSOZ(unbalanced in and balanced out) are interfaced.
CD player and speakers are set up too. Power is fed on.
I hear nothing. My ear is hitting the speaker corn. I still hear nothing. Leave it away one hour.
I put on CD, Ryan Adams, La Cienega Just Smiled. It starts playing. WHOA! NICE! NICE! NICE!
I put on another CD, Tracy Chapman, Fast Car. WHOA! NICE! NICE! NICE!
I select one classical music CD, Rachel Barton, violin, and Samuel Sanders, piano,
Homage to Pablo De Sarasate. WHOA! NICE! NICE! NICE!
I play DVD, Steven Spielberg, Saving Private Ryan. WHOA! The soundtracks kill me.
Tonight I will forget the X-circuit, CMRR, distortion cancellation, Spice model
simulation, frequency BW, ... I will just enjoy nice music, and wine...
I would like to describe the sound, but it is out of my ability. I do not know
how to describe. Okay, I will read a book, and week later, I hope I will find
right words to write down about the sound... In addition, I will post the circuit and
resistor values exactly as built...
JH
XSOZV2 and BOSOZ(unbalanced in and balanced out) are interfaced.
CD player and speakers are set up too. Power is fed on.
I hear nothing. My ear is hitting the speaker corn. I still hear nothing. Leave it away one hour.
I put on CD, Ryan Adams, La Cienega Just Smiled. It starts playing. WHOA! NICE! NICE! NICE!
I put on another CD, Tracy Chapman, Fast Car. WHOA! NICE! NICE! NICE!
I select one classical music CD, Rachel Barton, violin, and Samuel Sanders, piano,
Homage to Pablo De Sarasate. WHOA! NICE! NICE! NICE!
I play DVD, Steven Spielberg, Saving Private Ryan. WHOA! The soundtracks kill me.
Tonight I will forget the X-circuit, CMRR, distortion cancellation, Spice model
simulation, frequency BW, ... I will just enjoy nice music, and wine...
I would like to describe the sound, but it is out of my ability. I do not know
how to describe. Okay, I will read a book, and week later, I hope I will find
right words to write down about the sound... In addition, I will post the circuit and
resistor values exactly as built...
JH
You certainly deserves all good music in the world and some good red wine too, and we are eager to read all about your machines and how they sound when your hangover is gone.
Cheers
Cheers
henrik
could you post diagram showing the connection from your rca plugs to the +/- inputs on xbosoz thanks.
could you post diagram showing the connection from your rca plugs to the +/- inputs on xbosoz thanks.
jh6you
jh6you,
what speakers do you use?
i understand, that someone who has just finished a new project may be enthusiasted.
I still fire SOZ and BOSOZ with absolutely best parts one can buy- with wilson audio Watt/Puppy speakers.
All people, who listened to my system say that it`s within the best they ever heard- regarding the price of making the Pass circuits. But i am overcritical, and think that there is space to improve. some instruments and voices could be better placed and the room between them could be better defined...and so on.
Cause of that reason i hope that i can improve the system by upgrading SOZ and BOSOZ to X.....
Has anyone else tested different xsoz schematics?
jh6you, when you come down after a few days and you have read a book with sound decription, it would be kindly of you to precise your listening impressions.
Nelson Pass and others: one more thanks for sharing know-how,
Regards,
Ralf
jh6you said:Ye...
XSOZV2 and BOSOZ(unbalanced in and balanced out) are interfaced.
CD player and speakers are set up too. Power is fed on.
I hear nothing. My ear is hitting the speaker corn. I still hear nothing. Leave it away one hour.
I put on CD, Ryan Adams, La Cienega Just Smiled. It starts playing. WHOA! NICE! NICE! NICE!
I put on another CD, Tracy Chapman, Fast Car. WHOA! NICE! NICE! NICE!
I select one classical music CD, Rachel Barton, violin, and Samuel Sanders, piano,
Homage to Pablo De Sarasate. WHOA! NICE! NICE! NICE!
I play DVD, Steven Spielberg, Saving Private Ryan. WHOA! The soundtracks kill me.
Tonight I will forget the X-circuit, CMRR, distortion cancellation, Spice model
simulation, frequency BW, ... I will just enjoy nice music, and wine...
I would like to describe the sound, but it is out of my ability. I do not know
how to describe. Okay, I will read a book, and week later, I hope I will find
right words to write down about the sound... In addition, I will post the circuit and
resistor values exactly as built...
JH
jh6you,
what speakers do you use?
i understand, that someone who has just finished a new project may be enthusiasted.
I still fire SOZ and BOSOZ with absolutely best parts one can buy- with wilson audio Watt/Puppy speakers.
All people, who listened to my system say that it`s within the best they ever heard- regarding the price of making the Pass circuits. But i am overcritical, and think that there is space to improve. some instruments and voices could be better placed and the room between them could be better defined...and so on.
Cause of that reason i hope that i can improve the system by upgrading SOZ and BOSOZ to X.....
Has anyone else tested different xsoz schematics?
jh6you, when you come down after a few days and you have read a book with sound decription, it would be kindly of you to precise your listening impressions.
Nelson Pass and others: one more thanks for sharing know-how,
Regards,
Ralf
Hi Ralf
You have good speakers. I have two sets.
I am listening to CD, the pure voice of Emma Kirkby, DECCA DD 5903 460 583-2. It is now on Track 10, O let me weep!, Purcell. Her voice is really pure. I do not know where the song is recorded, but I guess it was in a church as thin hall tone is backing her voice. No digital smell at all, and sound more like a high-end tube amplifier.
To learn how to write down the sound on the paper, I am reading, Robert Harley, The Complete Guide to High-end Audio, Acapella Publishing 1994.
JH
PS
My as-built version of XSOZV2 has no negative feedback loop from the output to the input.
I believe Henrik tried both SOZ and XSOZ. Right Henrik?
You have good speakers. I have two sets.
- Ariel
- Kochel Horn (8 ohm 97dB) http://www.welbornelabs.com/recomendspeaks.htm
I am listening to CD, the pure voice of Emma Kirkby, DECCA DD 5903 460 583-2. It is now on Track 10, O let me weep!, Purcell. Her voice is really pure. I do not know where the song is recorded, but I guess it was in a church as thin hall tone is backing her voice. No digital smell at all, and sound more like a high-end tube amplifier.
To learn how to write down the sound on the paper, I am reading, Robert Harley, The Complete Guide to High-end Audio, Acapella Publishing 1994.
JH
PS
My as-built version of XSOZV2 has no negative feedback loop from the output to the input.
I believe Henrik tried both SOZ and XSOZ. Right Henrik?
jh6you
jh6you,
you build XSOZV2 Revision 5. of page 25 with original bosoz?
your XSOZV2 Revision 5 brings about 30 Watts?
What can one take instead of ztx450?
How did you adjust R4?
however, the speed of building your amps was mach5 - at least- (respect)
Regards,
Ralf
jh6you,
you build XSOZV2 Revision 5. of page 25 with original bosoz?
your XSOZV2 Revision 5 brings about 30 Watts?
What can one take instead of ztx450?
How did you adjust R4?
however, the speed of building your amps was mach5 - at least- (respect)
Regards,
Ralf
jh6you
Yes I have ben able to directly compare SOZ, XSOZ and XSOZ with a buffer.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=3949&perpage=15&pagenumber=17
The XSOZ without buffer was clearley the best sonding, but it requiered the low ouputimedance from the XBOSOZ.
When You compare A wit B, then You get a clear answer, but how explain their relation to other onknowns, that is the hard question.
Ralf
It is easy to tryout the X on already build SOZ and BOSOZ.
Yes I have ben able to directly compare SOZ, XSOZ and XSOZ with a buffer.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=3949&perpage=15&pagenumber=17
The XSOZ without buffer was clearley the best sonding, but it requiered the low ouputimedance from the XBOSOZ.
When You compare A wit B, then You get a clear answer, but how explain their relation to other onknowns, that is the hard question.
Ralf
It is easy to tryout the X on already build SOZ and BOSOZ.
Hi Ralf
Your questions are somewhat difficult, but I will do my best to put down the right answers.
JH
Your questions are somewhat difficult, but I will do my best to put down the right answers.
- XSOZV2 as-built is faintly different from Revision 5: C2 and R21 removed.
- Not original BOSOZ. Mine is on page 21 of this thread. But, R1 is changed to 750 and R15 reduced to 430.
- Maximum 25W unless Nelson Pass or someone else does not correct me.
- You can use MPSA42, MPSA18, 2N6517 (I used this) or equivalent.
- Adjust R4 of + input side in order to get the Q-voltage of about 18, and adjust R4 of - input side until I get to nearly zero DC volt between speaker terminals.
- My speed was Mach 6, and I got scars on my hands, and made wife lonely.
JH
Hi Henrik
I have not thought about the input buffer from the beginning. My measure has been V = (results/number of element). I have pursued high value of V with low value of number of elements. I rarely do A/B test. I just draw my sound and music in mind, and try to get it. I might be quite subjective.
I agree that it is a hard question if any one asks me to compare mine with the reference I do not have.
JH
I have not thought about the input buffer from the beginning. My measure has been V = (results/number of element). I have pursued high value of V with low value of number of elements. I rarely do A/B test. I just draw my sound and music in mind, and try to get it. I might be quite subjective.
I agree that it is a hard question if any one asks me to compare mine with the reference I do not have.
JH
BOSOZ and XSOZV2 / as-buily
To be able to describe the sound, I have read the book, The Complete Guide to High-end Audio, three times. It however does not help. I still can not describe the sound. I might articulate simply one word: ¡°THESOUNDISWONDERFUL.¡±
BOSOZ and XSOZV2 as-built give me wonderful sound and music for new CDs, no doubt. Therefore, I have tried to listen to three old-recorded CDs.
Have you listened to the set up of Nagra pre, KR enterprise tube power and Avantgarde Uno speakers? If so, we could share the same language. Nelson Pass and others, who have better systems, might laugh. If so, I would like to propose them to make one set and see.
There might be certain room for further improvement by better selection of resistor values or with nice bypass coupling film capacitors, or else. I could think about such things someday, but not now.
JH
To be able to describe the sound, I have read the book, The Complete Guide to High-end Audio, three times. It however does not help. I still can not describe the sound. I might articulate simply one word: ¡°THESOUNDISWONDERFUL.¡±
BOSOZ and XSOZV2 as-built give me wonderful sound and music for new CDs, no doubt. Therefore, I have tried to listen to three old-recorded CDs.
- Beethoven, Violin Concerto ;Yehudi Menuhin; Orchestre Philharmonique de Berlin; W Furtwangler; Live 30 Sept. 1947
- Beethoven, Piano Concerto No.5 ¡°Emperor¡±; Eswin Fischer; The Philharmonia Orchestra; W Furtwangler; Feb. 1951
- Bellini, Norma; Maria Callas; Tullio Serafin; 1954
Have you listened to the set up of Nagra pre, KR enterprise tube power and Avantgarde Uno speakers? If so, we could share the same language. Nelson Pass and others, who have better systems, might laugh. If so, I would like to propose them to make one set and see.
There might be certain room for further improvement by better selection of resistor values or with nice bypass coupling film capacitors, or else. I could think about such things someday, but not now.
JH
jh6you
HI jh6you,
it`s really amazing, how you do want to describe the sound of your amps.
Whats about the description as: the singer can exactly be located in the middle between the speakers, about one meter (3 feets) behind, mouth in 5 feet high... The size of the singer is exactly as big, as in original...
guitar is left side two feet left of the left speaker.
each instrument has his size and color. The space between singer and instruments can exactly be defined with the ears... and so on.
But i think the psychological aspects are very tricky and many people hear that what they wish to hear.
Nevertheless i think your designed amps are worth to be build - and tested.
Whats with the other guy`s in the x-soz forum,
i think jh6you and hendrik are the only fews, wich share it in the moment?
the big advantage of this design is, that one do not need such big parts as the original SOZ, and cause of this reason very interesting for people like me, wo want to build more of them for going active- not payable with SOZ!.
Regards,
Ralf
What do others think about the amp of jh6you?
HI jh6you,
it`s really amazing, how you do want to describe the sound of your amps.
Whats about the description as: the singer can exactly be located in the middle between the speakers, about one meter (3 feets) behind, mouth in 5 feet high... The size of the singer is exactly as big, as in original...
guitar is left side two feet left of the left speaker.
each instrument has his size and color. The space between singer and instruments can exactly be defined with the ears... and so on.
But i think the psychological aspects are very tricky and many people hear that what they wish to hear.
Nevertheless i think your designed amps are worth to be build - and tested.
Whats with the other guy`s in the x-soz forum,
i think jh6you and hendrik are the only fews, wich share it in the moment?
the big advantage of this design is, that one do not need such big parts as the original SOZ, and cause of this reason very interesting for people like me, wo want to build more of them for going active- not payable with SOZ!.
Regards,
Ralf
What do others think about the amp of jh6you?