Well I'm sorry too, but Mr. Curl has never presented his topology in this thread or on this forum. Many, including me, have posted several topologies in this thread which have been discussed and which anyone could build if they preferred so. Actually it is due to the threadstarter Darry that Mr. Curl's design has been a starting point for discussion and exploring several topology issues which brought many diy-ers much insight. A good and fruitfull development if you ask me.
Besides; the design is not pattented and the BT is not even being build anymore. So what's your problem?
You mention that the Moxtone PSU is poorly designed. Well, propose a better one and let's get back to discussing the points Darry mentions.
Franklin
Franklin,
I did not say that Moxtone power supply was poorly designed but not as sophisticated as Mr.Curl's.
My gripe with Moxtone is the implied idea that it is their orignal work. Reading between the lines you can easily deduce that it is Mr.Curls work the only details left are certain aspects if the servo and power supply.
On a dfifferent note I would like to see someone try to expand on the basic topology and as you suggest a more advanced power supply.
Regards,
Jam
I did not say that Moxtone power supply was poorly designed but not as sophisticated as Mr.Curl's.
My gripe with Moxtone is the implied idea that it is their orignal work. Reading between the lines you can easily deduce that it is Mr.Curls work the only details left are certain aspects if the servo and power supply.
On a dfifferent note I would like to see someone try to expand on the basic topology and as you suggest a more advanced power supply.
Regards,
Jam
jam said:
The word that comes to mind is plagiarism. That's where you don't give credit to the original author for their work and leave the impression that it is your own.
What's so hard about saying, "This was inspired by the work of (fill in the blank)"?
In this case, even John Curl has gone on record saying that he was inspired by Charles Hansen's work.
The preamp published on that Croatian web site is without any doubt an attempt to make a Blowtorch copy.
Hi, Janneman,
Yesterday the man you recognize was asking you. Greetings from them 😀.
Hi, 1audio,
Yesterday the man you recognize was asking you. Greetings from them 😀.
Hi, 1audio,
I notice, the better sounding live performance DVD has a microphone targeting at the musician's monitor loudspeaker at stage, not directly taken at the musical instrument itself.
looks like it to me, too.
i will give the person credit for actually building something, though.
finished designs are nice to see, compared to all the simulation.
but, there is no doubt that it helps to finish the project faster if someone does a lot of leg work for you
😉
mlloyd1
PMA said:
i will give the person credit for actually building something, though.
finished designs are nice to see, compared to all the simulation.
but, there is no doubt that it helps to finish the project faster if someone does a lot of leg work for you
😉
mlloyd1
We have seen a lot of various "versions" of Blowtorch preamp in this thread , some very unusual. No one, but John Curl know accurate circuit. Blowtorch owners , wealthy people, are probably not capable of making reverse eng. circuit diagrams.PMA said:
Mr. Uskokovic,Uskok preamp designer, has right to publish his circuit which according to him is " partly combination of well known topologies of various designers around the world"
Uskok power supply is less elaborate than Blowrorch P.S. but it is a part of designer philosophy. He has tried more advanced regulators, but they are, in his opinion, a waste of time and money.
A few provocative thoughts:
1) Does the steady state response of a system predict its dynamic response? We can map the input-output relationship pretty precisely under various steady state conditions, but do those predict the response under musical transient conditions?
2) When the human perception engine is in the chain between a performance of some sort and the perception of the performance where do we stay as neutral as possible and where do we attempt to predict and enhance/alter the signal to improve/reduce the degradation of the performance by the effects of the chain? Since we are not in the room the performance was in with all of the sensory and experiential components (including the dinner before or the nitecap after) not to mention the ability (missing in real life) of the instant replay, how valid is it to alter the performance to make it a better experience?
While these seem a little off topic on a discussion of a very linear electronic system they are the core of a lot of decisions we make in designing a preamp.
1) Does the steady state response of a system predict its dynamic response? We can map the input-output relationship pretty precisely under various steady state conditions, but do those predict the response under musical transient conditions?
2) When the human perception engine is in the chain between a performance of some sort and the perception of the performance where do we stay as neutral as possible and where do we attempt to predict and enhance/alter the signal to improve/reduce the degradation of the performance by the effects of the chain? Since we are not in the room the performance was in with all of the sensory and experiential components (including the dinner before or the nitecap after) not to mention the ability (missing in real life) of the instant replay, how valid is it to alter the performance to make it a better experience?
While these seem a little off topic on a discussion of a very linear electronic system they are the core of a lot of decisions we make in designing a preamp.
ad 1) - no, it does not. In another field, impulse amp for examination of post-arc currents in SF6 circuit-breakers, we measured single impulse response, behavior after overload, single shot capture. No steady state measurement was able to give an answer.
jam said:
Why not just ask Mr Milan Moamps himself ?
www.diyaudio.com/forums/showthread.php?postid=909148#post909148
kamis said:
Yep, they're all too plain for that.
Re: Re: Re: Re: tone controls
That's a nice story too, but how did he managed to change the speed a bit? As far as I know, in those good old days, most of the studio recorders had a capstan direct driven by a synchronous "aussenlaufer" motor (like the Telefunken M15 used by Phonogram in those days).
PMA said:
That's a nice story too, but how did he managed to change the speed a bit? As far as I know, in those good old days, most of the studio recorders had a capstan direct driven by a synchronous "aussenlaufer" motor (like the Telefunken M15 used by Phonogram in those days).
jam said:
Copyright does not apply to the design only the actual drawings and photos, and personal use only disclaimers actually have no legal standing in the US. I wish someone had info on the laws in the EU.
Not relevant, but what about their laws too, just curious. The husband of a friend moved a critical portion of his business to Iceland to avoid paying royalties on US patents.
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