Thank you again.darian said:
I will short the chip legs and report the"damages".
Regards
Ricardo
I think I saw this on DIYA, but there is a Technics IC that uses a tracking bias scheme - the SVI chip - reportedly very good sounding. Does anybody have a schematic for this chip? Does it operate in a similar manner to Steve schematic?
Well I have. 😀
It almost seems as if there is much less interest in a design if the designer is not selling either kits or assembled units.
If any one is interested in my design I will be happy to give as much help as possible. I was hoping to generate enough interest to post a finalized schematic. So far, no such interest.
Maybe I should sell kits. 😉
It almost seems as if there is much less interest in a design if the designer is not selling either kits or assembled units.
If any one is interested in my design I will be happy to give as much help as possible. I was hoping to generate enough interest to post a finalized schematic. So far, no such interest.
Maybe I should sell kits. 😉
Well I am no designer, but if a design can be finalized I would be more than happy to organize a GB of PCB's..
If we can make the numbers where we have price breaks, and we agree on a BOM I might even do kitting...
All work is done free it just requires patience on the buyers end..
If we can make the numbers where we have price breaks, and we agree on a BOM I might even do kitting...
All work is done free it just requires patience on the buyers end..
troystg:
The design HAS been finalized at different levels of performance. I had hoped to explain and show how I went from the basic design to each of the latter levels. Lack of interest has caused me to neglect this. If there is enough interest, I will start a new thread of my on instead of thread jacking this one. As you can see from the posts so far there is little interest. I haven't even drawn the interest of the usual people who are oh so ready to tell you what you have done wrong and why it can't work.
I learned alot when I started having the amps manufactured. For one thing, it is very difficult to make people believe you really want the parts you specked in the documentation. Fortunately this design is willing to accept most common transistor brands with the only change in the bias circuit.
If the interest is there I will draw up a schematic and parts list of the complete amp or the output stage only to be used with your favorite flavor of VGS. Since there is no GFB you can do that.
The design HAS been finalized at different levels of performance. I had hoped to explain and show how I went from the basic design to each of the latter levels. Lack of interest has caused me to neglect this. If there is enough interest, I will start a new thread of my on instead of thread jacking this one. As you can see from the posts so far there is little interest. I haven't even drawn the interest of the usual people who are oh so ready to tell you what you have done wrong and why it can't work.
I learned alot when I started having the amps manufactured. For one thing, it is very difficult to make people believe you really want the parts you specked in the documentation. Fortunately this design is willing to accept most common transistor brands with the only change in the bias circuit.
If the interest is there I will draw up a schematic and parts list of the complete amp or the output stage only to be used with your favorite flavor of VGS. Since there is no GFB you can do that.
Hello Steve, there is some hidden eyes(not a pair or so) watching this thread believe me 🙂
and there is lot of interest, just not enought skills on amplifiers designing.
I hope you are well ,and disaster will not progressive,stay well , think positive and remmeberth ere is always somewhere, someone in less good condition. at least we say so in hospital.
and there is lot of interest, just not enought skills on amplifiers designing.
I hope you are well ,and disaster will not progressive,stay well , think positive and remmeberth ere is always somewhere, someone in less good condition. at least we say so in hospital.
I don't think there is a "lack of interest", I think most (including myself) were somewhat confused on the illness issues.
The thread started then was put on hold due to illness and I don't think it ever "officially" resumed.
1. I hope you are well enough to do this.
2. If your condition changes please let me know so I don't badger you when your not well.
3. If you have a stash of parts by all means design the circuit with what you have, we (the forum) can design a PCB, I can order PCB's and parts you don't have, I can kit and mail.
We can put this circuit in peoples hand to evaluate for themselves.
If you want to do it in this thread, ok, if not we can start a fresh one. 😉
The thread started then was put on hold due to illness and I don't think it ever "officially" resumed.
1. I hope you are well enough to do this.
2. If your condition changes please let me know so I don't badger you when your not well.
3. If you have a stash of parts by all means design the circuit with what you have, we (the forum) can design a PCB, I can order PCB's and parts you don't have, I can kit and mail.
We can put this circuit in peoples hand to evaluate for themselves.
If you want to do it in this thread, ok, if not we can start a fresh one. 😉
Steve... try to post the full schematic...entire circuit from the input to output
including values, voltages, part numbers and suggest part.
This way we will be able to assemble... we will be able to listen... we will be able to show interest.
There's nothing complete... we have to arrange, to design input, to adapt.
There's nothing to have interest...just your suggested output.
Even when we offer complete, tested, absolutelly guaranteed schematics people feel afraid to try.... i worked as a crazy horse for years and could have less than 300 guys building my "for free" amplifiers!
We are more than seventy thousand....so, produce the statistics.
There's nothing to be sold as an idea....nothing to be sold as a kit also.... i could see almost nothing.... just clues, tracks, suggestions and ideas.
Post the real thing... post pictures!..show boards, pictures of parts.
This is my suggestion.... i do not feel confortable to try using the informations i have... post the entire, complete amplifier, from input to output, values and part numbers, transistor sugggestions and so on.
Jennings offered himself to help doing the hard work.
Send me boards and critical parts...i will be able to produce, to show to forum folks, to say what i felt listening.
Carlos Eugenio Mergulhão
Rua Dona Balbina Menelau 56-1601
Candeias - Jaboatão dos Guararapes
Pernambuco - Brazil
South America
54440-331
I think.... well, i can be wrong, people has absolutelly none interest into amplifiers they could not see pictures, and schematics.. and also they trust when some forum member build and said worked fine, sounded fine..otherwise thread goes to the land of forgotten things.
I can instruct you or Jennings how to send me parts without customs block... cannot be too much parts and there are tricks to hide them.
Carlos
including values, voltages, part numbers and suggest part.
This way we will be able to assemble... we will be able to listen... we will be able to show interest.
There's nothing complete... we have to arrange, to design input, to adapt.
There's nothing to have interest...just your suggested output.
Even when we offer complete, tested, absolutelly guaranteed schematics people feel afraid to try.... i worked as a crazy horse for years and could have less than 300 guys building my "for free" amplifiers!
We are more than seventy thousand....so, produce the statistics.
There's nothing to be sold as an idea....nothing to be sold as a kit also.... i could see almost nothing.... just clues, tracks, suggestions and ideas.
Post the real thing... post pictures!..show boards, pictures of parts.
This is my suggestion.... i do not feel confortable to try using the informations i have... post the entire, complete amplifier, from input to output, values and part numbers, transistor sugggestions and so on.
Jennings offered himself to help doing the hard work.
Send me boards and critical parts...i will be able to produce, to show to forum folks, to say what i felt listening.
Carlos Eugenio Mergulhão
Rua Dona Balbina Menelau 56-1601
Candeias - Jaboatão dos Guararapes
Pernambuco - Brazil
South America
54440-331
I think.... well, i can be wrong, people has absolutelly none interest into amplifiers they could not see pictures, and schematics.. and also they trust when some forum member build and said worked fine, sounded fine..otherwise thread goes to the land of forgotten things.
I can instruct you or Jennings how to send me parts without customs block... cannot be too much parts and there are tricks to hide them.
Carlos
Steve Dunlap said:
Hello Steve,
as a proof of interest I can tell you that I have turned on email notification of new posts to this thread (almost from the beginning) since I believe this amplifier has a potential.
My amplifier uses a tube front end followed by a power diamond buffer and I was looking for another design to compare... it seems I found it.
Regards
Andrea
The recent illness was not mine but that of the wife of c2cthomas (Tom). He had planned to help me with the things I can no longer do, but he has been very busy. I understand what he is going through and will not complain that he has not had time for me. My illness was in the past but the results will be with me always. I am no longer able physically to build amps or even handle parts. I "type" with voice recognition software.
I posted the basic schematic because that is what I had on hand while sitting in front of the computer. It seemed some people were somewhat impatient and I felt if I took the time to draw up the current schematic people would lose interest. The schematic I posted does work but I will produce one that is more current. I also posted my VGS and pointed out you could use it or another that you might prefer more. Since there is no GNF the output stage can be considered a buffer for the VGS (voltage gain stage) of your choice.
I have lots of parts on hand (anybody need 1000 transformers?) to build amps at different power levels. I have boards, heat sinks, filter caps and all the little stuff. I even have leftover cases that I used to build the prototypes. If you live close enough to Nashville (west of the city) I will even give all the parts to someone to build and report on. I CANNOT SHIP, don't ask. This is why I never sent parts to Carlos. Tom was going to handle that for me.
Please understand also that this is not just one amp. I built and sold at several power levels. The circuit scales well with proper consideration of power supply, number of output pair and heat sinking. I will start with a 50W amp. That's what the 1000 transformers were for. If there is interest I will show higher power units. 1200W at 8 ohms seems to be the practical upper limit with currently available transistors.
Be patient. Ask questions while you wait. Talk amongst yourselves.
I posted the basic schematic because that is what I had on hand while sitting in front of the computer. It seemed some people were somewhat impatient and I felt if I took the time to draw up the current schematic people would lose interest. The schematic I posted does work but I will produce one that is more current. I also posted my VGS and pointed out you could use it or another that you might prefer more. Since there is no GNF the output stage can be considered a buffer for the VGS (voltage gain stage) of your choice.
I have lots of parts on hand (anybody need 1000 transformers?) to build amps at different power levels. I have boards, heat sinks, filter caps and all the little stuff. I even have leftover cases that I used to build the prototypes. If you live close enough to Nashville (west of the city) I will even give all the parts to someone to build and report on. I CANNOT SHIP, don't ask. This is why I never sent parts to Carlos. Tom was going to handle that for me.
Please understand also that this is not just one amp. I built and sold at several power levels. The circuit scales well with proper consideration of power supply, number of output pair and heat sinking. I will start with a 50W amp. That's what the 1000 transformers were for. If there is interest I will show higher power units. 1200W at 8 ohms seems to be the practical upper limit with currently available transistors.
Be patient. Ask questions while you wait. Talk amongst yourselves.
Hi Steve - YGM and a message on your phone service. 😀
Susan (AKA "Dances With Dachshunds") is recovering well from her stroke. Doing therapy for speech and memory but the physical things are OK. Having trouble with heart fibulation (which was the cause of the stroke) but we fired one heart specialist and found a new one that seems to have her back on track.
More testing to be done next week - but I see a light at the end of the tunnel and should be able to free up some time to help out with things. I would love to see your design getting into the hands of a few builders and see what comes out!
I can bring my digital camera over for some shots of your stuff if that might help things out.
Susan (AKA "Dances With Dachshunds") is recovering well from her stroke. Doing therapy for speech and memory but the physical things are OK. Having trouble with heart fibulation (which was the cause of the stroke) but we fired one heart specialist and found a new one that seems to have her back on track.
More testing to be done next week - but I see a light at the end of the tunnel and should be able to free up some time to help out with things. I would love to see your design getting into the hands of a few builders and see what comes out!
I can bring my digital camera over for some shots of your stuff if that might help things out.
Well, I have a digital camera. I just haven't taken a picture in over a year. Bring your own if you want to. I can point out what to shoot and you can take the top off to show the good stuff inside.
I have learned not to run for the phone when it rings. 😀
I have learned not to run for the phone when it rings. 😀
Steve & Thomas,
I for one am very grateful for your efforts, particularly when you are faced with such life circumstances that could easily lead you to an inwardly focused perspective.
I am about the same age and have some relatively small health issues but am eternally grateful for how lucky both my wife & I are.
I would love to see this amp design gain more exposure here as it seems to contain some concepts that are realised in a novel way.
I can't enter into another new build as I'm already overstretched in trying to finish my currently started projects but I will be watching this thread keenly.
I for one am very grateful for your efforts, particularly when you are faced with such life circumstances that could easily lead you to an inwardly focused perspective.
I am about the same age and have some relatively small health issues but am eternally grateful for how lucky both my wife & I are.
I would love to see this amp design gain more exposure here as it seems to contain some concepts that are realised in a novel way.
I can't enter into another new build as I'm already overstretched in trying to finish my currently started projects but I will be watching this thread keenly.
Steve,
For my part, and I can't answer for others, your ownership of the IP prevents me taking too much interest as I make my living from building and selling amps. I would not want to infringe on your work, or designs, and this is why I took it no further.
I have a healthy interest in your design, but IP is a difficult area and I want all my products to be my designs.
Good health,
Hugh
For my part, and I can't answer for others, your ownership of the IP prevents me taking too much interest as I make my living from building and selling amps. I would not want to infringe on your work, or designs, and this is why I took it no further.
I have a healthy interest in your design, but IP is a difficult area and I want all my products to be my designs.
Good health,
Hugh
He can make it more simple, less sophisticated, a simplified version as a sample
for our forum... without worries about IP... as he can make more complete, more perfect and better.
I have made something alike that.... i have published my Dx Amplifier, and you can see it uses the same topologie as your Aksa 55.... had not the perfect sonics, the superior sonics as the 55 has.... but is some "demonstration", a sample of what your amplifier can do...means.... "the real thing, the developed schematic, having the IP parts and subcircuits can do better than that one!"
So... if someone wants the best one... a much better one...then go to the Aksa 55.... paying, of course, to have the rigth to listen to the best.... BUT had a previous sample...something inferior but able to demonstrate some of the characteristics will be also present into the "real thing", that was used as "inspiration"... with almost same tophologie and a lot of carefull to avoid the IP things and to include my own love for strong, special, loosen deep bass.
The same method can be used by Dunlap.... without hurt his secrets and copyrigth protected gods, he can produce the VAS, a simplified one..... a sample only.... a workable unit... an entire schematic, a working amplifier, with some of his ideas included, alike the output, and the "special parts and subcircuits and tuning" should be not published.
This way, people will have something to build, something to evaluate and the interest to have the complete, entire unit will be alive.... IP protected, and if he decide to produce this as business, to advertise into the forum or other place he will be free to do, to sell or to offer as kits.
Well.... i can do all i can do.... i am unable to do more than that... i cannot travell to US to have some tricky parts... also i cannot help typing without informations.... also i cannot assemble what i have not in my hands... i cannot discover schematics using telepathy.
Well, to work as a "round the clock" electronics design counsellor we already have hundreds.... virtual folks is what we have in excess in our forum...theories and "i think so" we have in enougth quantity to bother even heaven anjos.... substance, material, real amplifiers,working things, not only simulator things, is what we need... the real DIY is what is needed, the rarity into the DIY forum... interesting that.... a show you off, show yourself, the prides show, or some "I am good forum" will be hundred percent more used than our forum.
People trust into things made, build, tested and evaluated by forum members... testimonies are needed... i cannot see another way to see our things beeing built, accepted and considered reliable.
You know what i mean... you can offer a nice barbecue... a wonderfull steak with some salt and garlic.... and to offer to your special guesses the ones having paprica, some pepper, a touch of other things that makes the steak much better.... even offering good steak for your people.... a chance to taste, the introductory idea... the sample!
Be happy folks... i do my best to be happy... i hope you do it better than i can do.
Carlos
regards,
for our forum... without worries about IP... as he can make more complete, more perfect and better.
I have made something alike that.... i have published my Dx Amplifier, and you can see it uses the same topologie as your Aksa 55.... had not the perfect sonics, the superior sonics as the 55 has.... but is some "demonstration", a sample of what your amplifier can do...means.... "the real thing, the developed schematic, having the IP parts and subcircuits can do better than that one!"
So... if someone wants the best one... a much better one...then go to the Aksa 55.... paying, of course, to have the rigth to listen to the best.... BUT had a previous sample...something inferior but able to demonstrate some of the characteristics will be also present into the "real thing", that was used as "inspiration"... with almost same tophologie and a lot of carefull to avoid the IP things and to include my own love for strong, special, loosen deep bass.
The same method can be used by Dunlap.... without hurt his secrets and copyrigth protected gods, he can produce the VAS, a simplified one..... a sample only.... a workable unit... an entire schematic, a working amplifier, with some of his ideas included, alike the output, and the "special parts and subcircuits and tuning" should be not published.
This way, people will have something to build, something to evaluate and the interest to have the complete, entire unit will be alive.... IP protected, and if he decide to produce this as business, to advertise into the forum or other place he will be free to do, to sell or to offer as kits.
Well.... i can do all i can do.... i am unable to do more than that... i cannot travell to US to have some tricky parts... also i cannot help typing without informations.... also i cannot assemble what i have not in my hands... i cannot discover schematics using telepathy.
Well, to work as a "round the clock" electronics design counsellor we already have hundreds.... virtual folks is what we have in excess in our forum...theories and "i think so" we have in enougth quantity to bother even heaven anjos.... substance, material, real amplifiers,working things, not only simulator things, is what we need... the real DIY is what is needed, the rarity into the DIY forum... interesting that.... a show you off, show yourself, the prides show, or some "I am good forum" will be hundred percent more used than our forum.
People trust into things made, build, tested and evaluated by forum members... testimonies are needed... i cannot see another way to see our things beeing built, accepted and considered reliable.
You know what i mean... you can offer a nice barbecue... a wonderfull steak with some salt and garlic.... and to offer to your special guesses the ones having paprica, some pepper, a touch of other things that makes the steak much better.... even offering good steak for your people.... a chance to taste, the introductory idea... the sample!
Be happy folks... i do my best to be happy... i hope you do it better than i can do.
Carlos
regards,
Attachments
I have a very good friend in Washington DC
And Luis Eduardo, Duda or Dudainc in our forum will travel to brazil in a matter of 1 week or 2 weeks..... he will be here for Christmas for sure...he has family into the South of this country.
Duda is always ready to help...if you want me to build i can do it gladly, i am curious about the sonics...just let me know.... Duda can bring the stuff to my hands soon and without customs problems.
Tricky parts, board (one is enougth as separation, sound stage is more a consequence of supply separation and phase than other things)... and even transformer can be sent to Duda adress.
Duda has an International Company for Acoustic works... always travelling but will "land" in Washington headquarters soon, as he is a good son, a Christian and it is almost impossible to him not to come to Brazil to be with his mother and family during Christmas.
So...it is up to you dear Steve Dunlap.... i suggest you to ask wife to catch that chip, those trick small transistors..the critical capacitors (if you have this into your circuit) and all minimum stuff needed to allow me to build and i will be ready to do it.
After one build...can be me or other forum folk..not needed to be me.... maybe better someone from your town that can collect some instructions and hard to find parts directly from your hands...and the guy can offer sample of pictures posted, can offer to us evaluation and test results...then a lot of folks will be interested to build, or to buy the real thing.
Just let me know into this adress and i will ask Duda to offer his adress to you:
panzertoo@yahoo.com
regards,
Carlos
And Luis Eduardo, Duda or Dudainc in our forum will travel to brazil in a matter of 1 week or 2 weeks..... he will be here for Christmas for sure...he has family into the South of this country.
Duda is always ready to help...if you want me to build i can do it gladly, i am curious about the sonics...just let me know.... Duda can bring the stuff to my hands soon and without customs problems.
Tricky parts, board (one is enougth as separation, sound stage is more a consequence of supply separation and phase than other things)... and even transformer can be sent to Duda adress.
Duda has an International Company for Acoustic works... always travelling but will "land" in Washington headquarters soon, as he is a good son, a Christian and it is almost impossible to him not to come to Brazil to be with his mother and family during Christmas.
So...it is up to you dear Steve Dunlap.... i suggest you to ask wife to catch that chip, those trick small transistors..the critical capacitors (if you have this into your circuit) and all minimum stuff needed to allow me to build and i will be ready to do it.
After one build...can be me or other forum folk..not needed to be me.... maybe better someone from your town that can collect some instructions and hard to find parts directly from your hands...and the guy can offer sample of pictures posted, can offer to us evaluation and test results...then a lot of folks will be interested to build, or to buy the real thing.
Just let me know into this adress and i will ask Duda to offer his adress to you:
panzertoo@yahoo.com
regards,
Carlos
Yep... for sure i do not like complicated schematics, and life
experience has shown me that this do not result fine...but there are some exceptions and i believe your schematic is one of them.
Also i am a BGT transistorized guy...i do not like Fets and Integrated circuits... i felt them as a "sin" when included into audio amplifiers.
But i am ready to try it.... not only ready but offering myself to do that.
regards,
Carlos
experience has shown me that this do not result fine...but there are some exceptions and i believe your schematic is one of them.
Also i am a BGT transistorized guy...i do not like Fets and Integrated circuits... i felt them as a "sin" when included into audio amplifiers.
But i am ready to try it.... not only ready but offering myself to do that.
regards,
Carlos
Steve Dunlap said:
I agree that 50W is a adequate power level for most application, and is also equivalent to the power of the amp I use.
No problem with patience, lately building a amp takes me months....
Thanks again for your efforts, they are really appreciated.
Ciao
Andrea
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