Einstein - The Amp from 90's schematic needed

[flancfuster]

Does anyone have the schematic for "Einstein - The Amp" from 1990? First amplifier they've made. Thanks.

 

[AndrewT]

I found this:
http://archive.makezine.com/06/homebrew/
from
http://www.tubecad.com/2006/07/blog0073.htm

 

[Gopher]

Why is this in solid state? Tubes surely?

 

[jerluwoo]

The one that Andrew has linked to is surely not from 1990. A little more info from the OP would be helpful.

 

[mjf]

einstein is a german based company.......

History - Einstein Audio Components GmbH

 

[flancfuster]

I found this:
http://archive.makezine.com/06/homebrew/
from
The real Einstein amplifier

Thank you Andrew. Unfortunately this is not the schematic I'm looking for.
The Amp made by Einstein (German company) is a solid state class AB integrated amplifier.
It is the one mentioned in the link posted by mjf (thanks mjf).

 

[luciano63]

EINSTEIN schematic diagram

Hi,
I am also looking for the wiring diagram and procedures for alignment of offset voltages and bias currents.
Did you find these documents?

 

[tiefbassuebertr]

as I know I have posted some years ago the schematic anywhere on this forum. But I don't find the associated pdf or jpg file.
As I know the only solid state amplifier from this company.
http://bilder.hifi-forum.de/medium/634578/einstein-the-amp_381786.jpg

 

[Ketje]

Does anyone have the schematic for "Einstein - The Amp" from 1990? First amplifier they've made. Thanks.

Perhaps this one ?
Mona

 

[aparatusonitus]

as I know I have posted some years ago the schematic anywhere on this forum. But I don't find the associated pdf or jpg ]

Best electrolytic capacitors

 

[hahfran]

Perhaps this one ?
Mona

No Einstein The Amp from 1990 was all semiconductors no tubes ... and 104 electrolytic caps....

 

[tiefbassuebertr]

Best electrolytic capacitors

Yes, the PDF file under post #372
Thank you very much for this advice.

 

[Mark Tillotson]

Well it claims the output devices are BUW83 and BUW84, I found datasheet for BUW84 saying its a high voltage NPN device, not an audio PNP darlington, and the BUW83 seems not to exist.

 

[osscar]

BDW 83/84 ? may be some gramatical error...

 

[mjf]

.......yes, bdw83/ bdw84.
in the german magazin hifi exklusiv 10/94 there in an article about the einstein amp (interview with the developer.......)

 

[osscar]

With front end +-61V rails and +-52 rails for darlingtons (3 pairs of 150W devices) - the specified output power looks less than it should be - 60W@8R and 120@4 when compared to PASS AB100 (+-50V rails and 100W@8 and 200@4 R) ? Maybe a weak transformer, the heat sink also looks small, interesting what is the bias current?

 

[cumbb]

30 mV per rail.

 

[osscar]

30mV per transitor on emitter resistor? ( 0.47r=60mA approx.)

 

[cumbb]

30mV per transitor on emitter resistor? ( 0.47r=60mA approx.)

Yes. 30 mV per 0,47 Ohm-resistor.