Maybe hautes bohémiennes were not eradicated by Bolshevism, merely slowed down for a while.
They can even be as helpfull for black magic audiofoly
that a flying dutchman briefing when it comes to boats velocity...
that a flying dutchman briefing when it comes to boats velocity...
indeed, I wondered this also, particularly in the small signal and control/logic systems areas. if you dont want to be stuck with NOS, not only is SMD higher performance (IMO) in these areas, but there are a lot more available high performance parts. its an extremely impressive build and inspirational is very apt, but I have to admit I would be even more impressed had SMD been used for these areas.
With no funds being spared on this work of art, you could even use ASMP foil SMD for critical parts, if the 'audio quality' is the area of concern with using SMD
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Expertise has no political affiliation. 😛
SMD is a much better amplifier is much more beautiful. 😛
In this concrete amp are SMD devices used in drivers and diagnostic circuits and also in CPU...
Nice THD ratio but looking at the schematic i spoted a copy cat
of Bob Cordell s error correction circuit.
Since adding this circuit reduce THD by 40dB at 1Khz and roughly
20dB at 20Khz it is clear that basicaly the DPA380 has high distorsion
and could hardly battle a DX amp if the latter was added the said HEC....
Maybe Carlos should have offered a complete building instruction of his design with Hawksford error correction 20 years ago.
That s not the point, Jacco...
The error correction circuit is simply a copy/paste of Cordell s implementation,
as well as the following mosfet OPS , the rest is a classical symetrical differential
that was very common a decade earlier than this design....
Besides , the said amp s input differentials have no degeneration wich greatly
increase GNFB and reduce distorsion , yet the measured ratios are quite high
considering the design guidelines.
A Crecsendo with miller compensation and with error correction would
be quite better....
The error correction circuit is simply a copy/paste of Cordell s implementation,
as well as the following mosfet OPS , the rest is a classical symetrical differential
that was very common a decade earlier than this design....
Besides , the said amp s input differentials have no degeneration wich greatly
increase GNFB and reduce distorsion , yet the measured ratios are quite high
considering the design guidelines.
A Crecsendo with miller compensation and with error correction would
be quite better....
So ? We're all a bunch of thieves, including Mr Federmann.
Mr Dudek stated ages ago he's a Hawksford & Cordell copycat/admirer.
His craftmanship is not about inventing the wheel.
Pavel is a total package designer, not a concept developer.
The latter devotes 90% energy to simulations/veroboard and 10% on practical implementation, Upupa-E is 50/50.
Mr Dudek is into engineering.
A year and a half ago i bought a retractable swimming pool roof from a manufacturer in Prague.
(ordered direct from the company, skipped the middle-man, ~$10K saved)
Not the latest state of the art, but solid engineering & excellent craftmanship.
Only practical design flaw i found were four retaining circlips of the wrong type, very impressive for a thing this size.
http://www.diyaudio.com/forums/soli...age-audio-power-amplifier-22.html#post2533816
Couple of years after Mr Cordell had his EC design published, i got hold of the article and built one, somewhere around '87.
Would have been nice if he had included some practical tidbits, even today i wouldn't hold my breath.
Sad fact of the matter is that electronics designers do not exactly excell in mechanical expertise.
(most notorious of which are Madrigal EE's, for thinking up stuff in theory, which are impossible in practice)
It's like cars and boats.
For best engineered cars : shop in Germany.
For best boats : if it ain't Dutch, it ain't much.
For high-tech novelties : travel to Italy and locate a really good car shop/garage.
Mr Dudek stated ages ago he's a Hawksford & Cordell copycat/admirer.
His craftmanship is not about inventing the wheel.
Pavel is a total package designer, not a concept developer.
The latter devotes 90% energy to simulations/veroboard and 10% on practical implementation, Upupa-E is 50/50.
Mr Dudek is into engineering.
A year and a half ago i bought a retractable swimming pool roof from a manufacturer in Prague.
(ordered direct from the company, skipped the middle-man, ~$10K saved)
Not the latest state of the art, but solid engineering & excellent craftmanship.
Only practical design flaw i found were four retaining circlips of the wrong type, very impressive for a thing this size.
http://www.diyaudio.com/forums/soli...age-audio-power-amplifier-22.html#post2533816
Couple of years after Mr Cordell had his EC design published, i got hold of the article and built one, somewhere around '87.
Would have been nice if he had included some practical tidbits, even today i wouldn't hold my breath.
Sad fact of the matter is that electronics designers do not exactly excell in mechanical expertise.
(most notorious of which are Madrigal EE's, for thinking up stuff in theory, which are impossible in practice)
It's like cars and boats.
For best engineered cars : shop in Germany.
For best boats : if it ain't Dutch, it ain't much.
For high-tech novelties : travel to Italy and locate a really good car shop/garage.
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And every designer is aware of at least some of what has come/gone before. This "awareness" influences what he/she incorporates into their musings.
Amplificator s Sculpture ?...
Surely that Beuys was right when he talks of everything being art.
Anyway , the perfs are sub par in respect of the mechanical skills ,
but even then , there s more machining and RD in a VW Golf that is
about the same price as an Ante Audio Amp , assumed it is really
Upupa that is its source , of course...
Hi Pavel
These are the most beautiful amps I've ever seen. Attention to detail is startling. Clearly done by one who loves audio.
I know you mentioned, and also I can see from your pictures that you like to use multiple resistors acting as one. To your ear, when combining resistors, which sounds better paralleling them or placing them in series?
These are the most beautiful amps I've ever seen. Attention to detail is startling. Clearly done by one who loves audio.
I know you mentioned, and also I can see from your pictures that you like to use multiple resistors acting as one. To your ear, when combining resistors, which sounds better paralleling them or placing them in series?
This is the "reference" I style my layouts after.
Epop's is da "artist" 😱.
This layout style will give best stability/durability/performance.
20 years - recap - 20 more years ....
My thanks for the inspiration that started in 2008 !
OS
Epop's is da "artist" 😱.
This layout style will give best stability/durability/performance.
20 years - recap - 20 more years ....
My thanks for the inspiration that started in 2008 !
OS
In most cases Pavel wants very low ohms and high currents so it's more practical to have them in parallel.
http://www.customworks.cz
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