BTW, does any know what kind of resistors those brown ones are? Looks like the same ones used on that other amp's innards that's rumored to be the Gaincard.
Another BTW, those brown, blue, black, and white wires seen here and on those other "Gaincard" pix look suspiciously similar to those that run between my Gaincard and Power Humpty. Interesting.
Best,
KT
Another BTW, those brown, blue, black, and white wires seen here and on those other "Gaincard" pix look suspiciously similar to those that run between my Gaincard and Power Humpty. Interesting.
Best,
KT
I still see it as a very well designed piece of equipment. Don't let the superficiality take you off the right track😉
I don't know if I could make it any better, seems like everything there has a purpose.
I don't know if I could make it any better, seems like everything there has a purpose.
What some of you consider to be flaws in the workmanship may be there for artistic reasons. The "hand-made" look may actually be his way of showing that the no part of the amp is factory made.
In the days of the samurai, a katana was painstakingly hand-made to perfection. If there was even the smallest of flaws, the smith would not even give it away for free. That thinking has evolved into modern manufacturing where robots weld a car together with perfectly beaded seams. In response to this expected perfection, many modern Japanese artists intentionally add small flaws to show that their artwork is made by hand.
🙂ensen.
In the days of the samurai, a katana was painstakingly hand-made to perfection. If there was even the smallest of flaws, the smith would not even give it away for free. That thinking has evolved into modern manufacturing where robots weld a car together with perfectly beaded seams. In response to this expected perfection, many modern Japanese artists intentionally add small flaws to show that their artwork is made by hand.
🙂ensen.
Re: Chip in the 4717
The photos are clickable to enlarge, and even the chip type is readable in that way: *M1875T.
About the classical vs. pop thing: the reviewer was a little bit more specific, describing his experiences with different records. Best results were indeed with string quartets, Locatelli, Vivaldi, Händel, but.... also Dire Straits worked out very nicely. All this is just what I pick out of the review. Doing a full translation would be best to know the full story, but hey, my gainclone case arrives today, so I have better things to do
😀
KT said:
The photos are clickable to enlarge, and even the chip type is readable in that way: *M1875T.
About the classical vs. pop thing: the reviewer was a little bit more specific, describing his experiences with different records. Best results were indeed with string quartets, Locatelli, Vivaldi, Händel, but.... also Dire Straits worked out very nicely. All this is just what I pick out of the review. Doing a full translation would be best to know the full story, but hey, my gainclone case arrives today, so I have better things to do
😀
Re: Re: Chip in the 4717
Hmm, sounds like an undersize PSU causing dynamic range limitation to me 🙂
MIB said:
Hmm, sounds like an undersize PSU causing dynamic range limitation to me 🙂
And what's with the LED and current limiting resistor on the homemade little vecterboard attached to the power transformer?
Did someone forget to make a real PCB for the LED?
Sorry about my obviously sarcastic remark.
The amplifier looks like it was constructed by a child.
I don't care how good it sounds. The build is sloppy.
Did someone forget to make a real PCB for the LED?
Sorry about my obviously sarcastic remark.
The amplifier looks like it was constructed by a child.
I don't care how good it sounds. The build is sloppy.
Nuuk said:
You are probably right. In fact it might be a nice exercise adding a switch to a buffered Gainclone, where the switch-on bypasses the buffer for listening to acoustic music.
Carlos
When I see these pictures, which are for real obviously, I wonder:
Can't Sakura Systems do any better?
Does Sakura Systems do this only to annoy some people?
Does Sakura Systems fool some people?
Does Sakura Systems to 100% believe in their products?
Does Sakura Systems' customers not demand more or don't they care?
Does Sakura Systems' products meet normal CE standards?
Can't Sakura Systems do any better?
Does Sakura Systems do this only to annoy some people?
Does Sakura Systems fool some people?
Does Sakura Systems to 100% believe in their products?
Does Sakura Systems' customers not demand more or don't they care?
Does Sakura Systems' products meet normal CE standards?
A few observations
Some things to notice on this arrangement:
1) The electrolytic capacitors have no jacket. That is something several people have tried and seems to work. In any case it's a cheap thing to try.
2) The supply ground is up front, probably with a free space for the input connection pads.
3) The input cap is electrolytic. The resistor on the right seems to link input pin (1) to ground, which would be very much p2p. The one on the left, below the cap, might be part of a Zobel. That cap is probably part of the feedback.
The rest we can only guess.
Carlos
Some things to notice on this arrangement:
1) The electrolytic capacitors have no jacket. That is something several people have tried and seems to work. In any case it's a cheap thing to try.
2) The supply ground is up front, probably with a free space for the input connection pads.
3) The input cap is electrolytic. The resistor on the right seems to link input pin (1) to ground, which would be very much p2p. The one on the left, below the cap, might be part of a Zobel. That cap is probably part of the feedback.
The rest we can only guess.
Carlos
I did not realize that some of the images were clickable to enlargen. LM1875T well, ok, nothing really unknown. Like in the Finallabs amp.
Your opinion about the cap in the feedback path?
This must be the one between the psu caps.
The smaller one underneath the board is obviously the input cap.
Is it possible to identify the caps only from their stripped can (size, backpattern, etc.)?
I still do not see a sloppy design here, intended to fool the customers. If you do not like this amp, simply do not buy it.
Your opinion about the cap in the feedback path?
This must be the one between the psu caps.
The smaller one underneath the board is obviously the input cap.
Is it possible to identify the caps only from their stripped can (size, backpattern, etc.)?
I still do not see a sloppy design here, intended to fool the customers. If you do not like this amp, simply do not buy it.
Cheap design.
Input signal from second and third input goes thru two switches.
Fader pot costs ca 5€ (for cheap consoles). Where is P&G?
Output signal goes thru weak switch, wires are very thin.
This is obviously NI design, than input and output wires are dangerously close.
It's possible to find all parts (except case) in local store for ca 100€.
What is purpose off red cap on bottom side?
Regards
Input signal from second and third input goes thru two switches.
Fader pot costs ca 5€ (for cheap consoles). Where is P&G?
Output signal goes thru weak switch, wires are very thin.
This is obviously NI design, than input and output wires are dangerously close.
It's possible to find all parts (except case) in local store for ca 100€.
What is purpose off red cap on bottom side?
Regards
IMHO,
Anyone planing on giving 2000€ for that piece of er... art, should audition a Plinius 8100 integrated (for example) which is not only cheaper but will play all sorts of music with authority, finesse and a lush that would make some wondering if it doesn't have some glass inside.
Regards,
J.Guilherme
Anyone planing on giving 2000€ for that piece of er... art, should audition a Plinius 8100 integrated (for example) which is not only cheaper but will play all sorts of music with authority, finesse and a lush that would make some wondering if it doesn't have some glass inside.
Regards,
J.Guilherme
What's this junk?😱
If a diyer here made a junk like that people would laugh.
But it's from 47Labs...
Small trafo, thin wires, non-shielded signal wire, cheap speaker terminals, kitchen-made PCB, bad soldering...
And that small board joining the wires?😱
Seams like a pre-historic radio.
And when I see those caps without jacket I get very suspicious...
They may say those are BGs or whatever.
I think that they may even be those cheapie-clear-green caps at 50c each that without the jacket anybody will notice.
A little more care on any commercial product is needed.
Even a cheap 100 Euro amp looks better than this.
If a diyer here made a junk like that people would laugh.
But it's from 47Labs...
Small trafo, thin wires, non-shielded signal wire, cheap speaker terminals, kitchen-made PCB, bad soldering...
And that small board joining the wires?😱
Seams like a pre-historic radio.
And when I see those caps without jacket I get very suspicious...
They may say those are BGs or whatever.
I think that they may even be those cheapie-clear-green caps at 50c each that without the jacket anybody will notice.
A little more care on any commercial product is needed.
Even a cheap 100 Euro amp looks better than this.
Those good reviews of the Gaincard amp we read on SakuraSystem website, were they not the reason for us starting to build (in thousands...?) those more or less professional looking clones...?
http://www.sakurasystems.com/reviews.html
SakuraSystem was the first company who made amplifiers with opamps successfully, were they not?
Then people on the ChipDIY website and Peter Daniel here at diyAudio made the clones, and convinced the rest of us.
Why critizise them now?
To me this 4717 looks cool.
/Jan
http://www.sakurasystems.com/reviews.html
SakuraSystem was the first company who made amplifiers with opamps successfully, were they not?
Then people on the ChipDIY website and Peter Daniel here at diyAudio made the clones, and convinced the rest of us.
Why critizise them now?
To me this 4717 looks cool.
/Jan
Well of course it could be seen as a threat to all those who think that expensive binding posts etc actually make a difference! 
I won't get into an argument about the price but it actually looks like an honest bit of engineering to me - refreshingly so for a commercial product. 😉
I won't get into an argument about the price but it actually looks like an honest bit of engineering to me - refreshingly so for a commercial product. 😉
carlosfm said:
And when I see those caps without jacket I get very suspicious...
They may say those are BGs or whatever.
I think that they may even be those cheapie-clear-green caps at 50c each that without the jacket anybody will notice.
A little more care on any commercial product is needed.
Even a cheap 100 Euro amp looks better than this.
I recall reading a reaction of Kimura somewhere, saying that he on purpose uses 'normal' components, so no audiophile stuff, because the sound of audiophile stuff would be to refined/artificial (do not recall exactly). Anyway, no BG's, but he doesn't pretend to use those as well.
Rob
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