mannycc said:
Of course. I'm not expecting anything better than my post to be removed by the moderators. BTW, my father was using other kind of arguments than jesting. And I tell you, they were effective, unfortunately, as much as I wish, they don't work over the internet
But beyond my jests, it's really sad that a bunch of n00bs are allowed to spread their pompous ignorance, all under the same moderator's eye.
I can perceive more of arrogance here than ignorance although both are present. Oh ego, what have you done???
Rgds,
mannycc
Rgds,
mannycc
syn08 said:
If people only knew, unfortunately I doubt if there is anyone interested enough in doing a detailed comparison between the two for even an output stage. I seriously doubt that there is anything major 10X off here.
In the end the listening will start and it won't matter anyway. I doubt if the distortion spectra could be any worse than the DarTZeel so clearly that doesn't matter anyway. I won't copy it here (they seem touchy) but read their "explaination" of what feedback is. Stone Age.
EDIT - I doubt the DarTZeel patent would survive a proper prior art search.
scott wurcer said:
Is there a link or post of the DarTZeel spectra??
c2cthomas said:
I don't speak for Steve.
Based on what I read, he actually wants us to build his amp.He said specifically that he was putting this simplified version of his amp out here for the DIY community.
He offered boards if you email him.
But originally did NOT expect to have any boards available.
This says pretty clearly to go ahead and make boards as far as I can tell.
I say go for it as a DIY project. There's a big difference between making boards up and selling them on the forum and going into the biz of making Krill amps. That's a no-no.
A variation for DIY is also just that, a variation for DIY. Not a no-no. Making a variation that is a complete amp as a BUSINESS is a no-no. Making one for Carlos, not a no-no.
😀
Joshua, wrong tree, stop barking?
You just need to read from the start of the thread, take ur time, and follow along in the schematic. Anything that people say that doesn't make sense technically? Time to break out some text books and see if you can figure out what the heck those guys are talking about. I do it myself.
I'm happy to admit that I will never know as much about electronic design as many of the folks participating in this thread - take it as an opportunity to investigate something that you are interested in. If ur lost, maybe a private email with a polite tone would get you either an answer or a source to find an answer on a technical question.
Let's just figure out how to build this thing, right here and now? The design and the construction are very related at this point.
I'd suggest posting the $$ total of the 50watt version Mouser BOM to give folks a sense of scale on the raw parts... as a start.
_-_-bear
bear said:
http://www.dartzeel.com/index.php?option=com_content&task=view&id=47&Itemid=69
Personally I find their prose patronizing and in some cases plain wrong.
I'm in this to get a feel for the state of discrete simulation.
Two things
- what's wrong with Steve's boards that nobody wants to buy them?
- they are available immediately & all parts needed, I think (thomas can tell us this probably)
- does this not prevent the inevitable bickering that's going to ensue about my board is different to yours when we come to compare measurements
- is it not primarily Steve's circuit that this whole thread is about, not some variant
- do you not feel like giving something back to Steve?
- what's wrong with Steve's boards that nobody wants to buy them?
- they are available immediately & all parts needed, I think (thomas can tell us this probably)
- does this not prevent the inevitable bickering that's going to ensue about my board is different to yours when we come to compare measurements
- is it not primarily Steve's circuit that this whole thread is about, not some variant
- do you not feel like giving something back to Steve?
jkeny said:
I'm dead serious. To end up this debate, how much are the boards, how many does he have, schematic? If the numbers are decent, and it all makes DIY sense, I may consider buying them (to help Steve) and distribute them for free on a first serve basis.
Thomas probably has an idea of the number of boards he has
Here's the BOM for 50W amp
Edit: again please check this for errors &/or updates
Here's the BOM for 50W amp
Edit: again please check this for errors &/or updates
jkeny said:
When we stumbled across them (almost literally) out in the work shop we opened them up did a quick count - It was around 100 PWB's. I have purchased two of them - he sent two to Carlos - and he has sold some - but how many he has sold I don't have a firm grip on. I suspect that he has around 70 or so left - but that is a WAG on my part. He has a boatload of transforms too - but they are wound for 120VAC @ 60Hz.
is anybody having trouble downloading files from DIYaudio.
I can't see that BOM in post1229.
It comes back "done" but the page is blank showing a background colour in dowdy mustard.
Is my security sometimes blocking downloads?
I can't see that BOM in post1229.
It comes back "done" but the page is blank showing a background colour in dowdy mustard.
Is my security sometimes blocking downloads?
The boards are mono & the price back at the start was $40 for a pair (needed for stereo) It also includes the two small board that the diode bias string is soldered to & attaches to the heatsink.
Guys, somebody put together a package with schematic, board size, quantity, prices, etc... and let me know.
70pcs. of 5x8"=40 sq. inch cost $18.60 a pop, to order from www.barebonespcb.com. Double sided, metallized holes. Again, I'm ready to help an individual, but not to support a business.
70pcs. of 5x8"=40 sq. inch cost $18.60 a pop, to order from www.barebonespcb.com. Double sided, metallized holes. Again, I'm ready to help an individual, but not to support a business.
syn08 said:
I'll certainly help out if need be. I am not really set up for anything other than small signal stuff. Do you think an old Hafler 220 chassis on a variac would make an adequate +-40V supply? I really don't have a single HV cap or transformer or heatsink in the house.
Syn08,
What exactly are you saying here? You won't buy Steve's boards, why? Does it not make sense, explain? Do you think he's a business in it for the money?
What exactly are you saying here? You won't buy Steve's boards, why? Does it not make sense, explain? Do you think he's a business in it for the money?
Syno8,
I don't expect you to buy & distribute Steve's boards for free I just thought you were ignoring his source of boards and going elsewhere to have them made http://www.barebonespcb.com./
This doesn't make sense to me!
I don't expect you to buy & distribute Steve's boards for free I just thought you were ignoring his source of boards and going elsewhere to have them made http://www.barebonespcb.com./
This doesn't make sense to me!
jkeny said:
jkeny said:
Yes, I pretty much saw this coming.
What I am trying to say is: if these boards are sold for DIY purposes (that is, at cost) and if the price is right (and I gave you a pointer of what is a good cost per inch for a PCB) I'll buy them all (in decent quantities) and distribute them for free. We could then collect a large variety of opinions on how this amp is working, including the sound. As far as I can tell, the BOM has no specialties, so DIYers can choose to buy the parts from Steve or from Mouser/Digikey/Newark/etc...
Also: this PCB has to be accompanied by a complete schematic, that is consistent with what is discussed here. The "official" schematic can be published here immediately, I guess. BTW, is it for 50W only?
I don't care about the actual PCB design and I don't plan to retain any PCBs for myself. I also don't plan to redesign the Krill PCB. I have enough DIY projects on my plate.
Syn08,
I'm not accusing you of anything, my fear was just that we would get away from the existing Krill OPS and start "improving" it thereby negating the whole object of the exercise - to investigate this topology and determine its limits.
I believe it very generous of you to make an offer of free distribution of pcbs but I think it would be a mistake - attracting those who only want something for free but have no intention or interest in building/measuring the circuit. Steve's price of $40 for two boards seems commensurate with the price you quotes as they are about 6" * 9" from memory.
I'm not accusing you of anything, my fear was just that we would get away from the existing Krill OPS and start "improving" it thereby negating the whole object of the exercise - to investigate this topology and determine its limits.
I believe it very generous of you to make an offer of free distribution of pcbs but I think it would be a mistake - attracting those who only want something for free but have no intention or interest in building/measuring the circuit. Steve's price of $40 for two boards seems commensurate with the price you quotes as they are about 6" * 9" from memory.
- Status
- Not open for further replies.