internals 47 labs 4717 integrated

[KT]

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

[Peter Daniel]

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.

[purplepeople]

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.

[MIB]

Originally posted by KT
He didn't mention the chip specifically, but based on what I've read on the forums, sounds like it may be the LM1875. If you can see it in the photos, well, there you go....

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

[miguel2]

Which input caps are there? They seem quite big electrolytics.

Miguel

[pinkmouse]

Originally posted by MIB
Best results were indeed with string quartets, Locatelli, Vivaldi, Händel, but.... also Dire Straits worked out very nicely.

Hmm, sounds like an undersize PSU causing dynamic range limitation to me

[Frank Berry]

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.

[carlmart]

Originally posted by Nuuk

What I have found is that with acoustic music, a passively driven amplifier can more accurately portay the nuances of the instrument(s) than an active system with more components in the signal path.

But for music that requires more oomph (for want of a better word), an actively driven amplifier does the job better than the passive.

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

[peranders]

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?

[carlmart]

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