I see it differently; we in the western world have been preened to passively consume with no guilt or regard to anything other than acquisition. The reality of capitalism is the buyer has ALL the power to determine the nature of the societies in which we participate.
That's probably all I can state without exceeding group guidelines...
Cheers!
Howie
Or a combination of analog ClassA and switching ClassD, like this https://www.diyaudio.com/forums/solid-state/304722-200w-class-amp-efficency.html#post5008854
I have all components ready just missing low voltage supply. I want to go all switching power supply but can't find satisfactory 2x6V 15A and probably will use linear with transformer there.
It seems a clever Idea: Keep on truckin' Dadod !
Both brings a good characteristic: the absence of any kind of crossing distortion and bring complementary benefits.
(between you and me, I admire your way to always challenge yourself with new ideas and new tracks of exploration, like I admire the way ostripper is exploring existing ones all azimuths.).
First listening impressions ?
So far so good.🙂 I tried with unbalanced inputs only, next I'll do with balanced using Benchmark DAC2.
Most non-vegetarians do. I mean who wants to put up with struggling animal when you bite into its flesh?
In infringing copyrights, patents, in a total, govt. supported, disdain of anything that resembles intellectual property.
Once again, you are extrapolating your Philips/NXP semi experience (almost nothing to defend). Try manufacturing brand name consumer goods and deal with the copycat products, effectively closing the local market for your products.
Of course. In human history IP is a fairly recent concept. Lot's of British IP was stolen in the early days of the US. Some day when enough IP is being stolen from Chinese IP owners, that's when they will suddenly feel a moral imperative that it should be protected.
A couple of former members used to post schematics and gerbers with errors, on purpose.
Because in 2-3 weeks the exact copies would be on epay, errors and all.
Because in 2-3 weeks the exact copies would be on epay, errors and all.
OT
I only had a faint memory, but it seems that I was correct. German products in the mid of the 19th century had a bad name as being cheap and bad. In addition german manufacturers tried to copy the appearance of better english products and finally even tried by clever labelling to hide the real place of manufacturing. When hitting the knife and scissor manufacturers located around Sheffield an new law was introduced due to the complaints of the original manufacturers. (Nothing new under the sun it seems.......):
"........it will be necessary, in order to comply with the section, that a definite
statement should be added, such as " manufactured in Germany," to indicate the origin of the goods.
With regard to direct false indications of origin the matter is simple enough. If knives are imported marked Sheffield when they have been manufactured in Germany, it will be evident that a fraud has been committed."
(The Merchandise Marks Act 1887)
In many fields the germans have been the "copy cats" of that time; i´ve read some amusing stories about (later) german tycoons like Krupp or Hoesch visiting (incognito) Britain and trying to squeeze out as much information as possible about the far better quality processes used in the steel industry.
But something was already changing (not at least due to harsh critique by a german on the displayed quality of german products at the Philadelphia world exhibition 1878) and the quality got better.
Finally the consumers associated even higher quality if goods were marked as "made in Germany" .......
Sure but we all are often just hiding in the masses and using it as an excuse.
Although "if i don´t do it somebody else will" is often correct, if nobody starts with "I don´t do it" it´s hard to change something.
I only had a faint memory, but it seems that I was correct. German products in the mid of the 19th century had a bad name as being cheap and bad. In addition german manufacturers tried to copy the appearance of better english products and finally even tried by clever labelling to hide the real place of manufacturing. When hitting the knife and scissor manufacturers located around Sheffield an new law was introduced due to the complaints of the original manufacturers. (Nothing new under the sun it seems.......):
"........it will be necessary, in order to comply with the section, that a definite
statement should be added, such as " manufactured in Germany," to indicate the origin of the goods.
With regard to direct false indications of origin the matter is simple enough. If knives are imported marked Sheffield when they have been manufactured in Germany, it will be evident that a fraud has been committed."
(The Merchandise Marks Act 1887)
In many fields the germans have been the "copy cats" of that time; i´ve read some amusing stories about (later) german tycoons like Krupp or Hoesch visiting (incognito) Britain and trying to squeeze out as much information as possible about the far better quality processes used in the steel industry.
But something was already changing (not at least due to harsh critique by a german on the displayed quality of german products at the Philadelphia world exhibition 1878) and the quality got better.
Finally the consumers associated even higher quality if goods were marked as "made in Germany" .......
Sure but we all are often just hiding in the masses and using it as an excuse.
Although "if i don´t do it somebody else will" is often correct, if nobody starts with "I don´t do it" it´s hard to change something.
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I finally get it...this thread is about a personal war between Scott Wurcer and Juhn Curl...
Well , i won't try to sell my "poor" third world country medicines to the USA, as they are not yet approved by the drug association, BUT:
AD712 was not made for phono preamplifiers.
You have attached the proof for it next to the advertised phono preamp in your post .
What made you recommend this op-amp for a phono preamp after reading its datasheet?
I can't find a single argument for that.
At least you didn't complain about the c-mos electronic switch right after the phono preamp...I can appreciate the true engineer here!
What made those brilliant designers put a capacitor at the input of a fet op-amp other than the fact they deliberately put it into a commercial system that needs to address every stupid user on Earth trying to plug the juicer through it to the grid maybe...
That amp was specifically made for stupid snobs and those designers that took advice from you treated them as stupid snobs.
Look inside any decent Marantz or Technics or Hitachi with fets or fet op-amps at the input...There's no input capacitor at all because it doesn't matter .
And they were sold in millions ...
Basically i have a great, no sorry, let me rephrase ...
I have THE GREATEST RESPECT FOR ANALOG DEVICES DATASHEET forms for they were much better explained and much more closer to the truth than the competition.
I've learned a lot more useful things from just two AD datasheets than from another 1000 from the whole competition, which are the AD797 and AD743
AD is not as humble as NJR , Hitachi, Mitsubishi or NEC which didn't even tell the most positive things about their chips for decades , but they know what they sell, that is for sure.
You can play the way you want with the sim i made and posted here and please try make the usual DA count for worse in a any phono preamp ever made IF you can!
A phono cartridge is an electromagnetic transducer, its slew rate can hardly beat any op-amp slew rate, but what's really important for a op amp in a phono preamp is its maximum supply voltage related to the saturation in the final stage.
Now...i know why this op-amp did still made a decent phono preamp in terms of linearity which is easily seen in the sim, and that is the high impedance of the feedback network, but you still needed to fix the lower range response with the final passive network after the op-amp .
So...where is it that you lost that dynamic?
Did you do it with the max +-15v supply?
Did you loose it in the high noise of the high impedance feedback network or in the final filter after the op-amp trying to fix the Bode plot?
Please keep in mind that i used the same antiriaa network with some simulations that show perfect response in the audio range with the right riaa network.
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Of course the same rationale is used by people who buy stolen merchandise, and it is just as duplicitous in that usage.
SNAP...and here we are...
Howie
I think that Yamaha and David Berning hold already the most interesting patents of classd-class a combined amps for a number of years.
I'm not sure about that...
I'd say it's a stream-of-consciousness thread that goes around in circles every few weeks/months and has occasionally interesting tidbits.
You should know better because it's your post number #11
https://www.diyaudio.com/forums/the...blowtorch-preamplifier-iii-2.html#post5344651
I personally find these wars very useful, it's some kind of brainstorming.
We should argue and fight each other to death even more 🙂
It's how men learn.
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