BAT VK30 Bride of son of zen rippoff?

hifi · 25th January 2002, 06:07 PM

i just checked the topology schematic on that preamp...it is a bride of son of zen with tubes......

is it under licens or?...

/micke

GRollins · 25th January 2002, 06:21 PM

The BOSOZ isn't patented. It's just a nicely executed solid state differential. As such, anyone is free to build one with any sort of gain devices that come to hand.
In the meantime, have a look at some of their other schematics and see if you find anything else that looks familiar...

Grey

Nelson Pass · 25th January 2002, 07:04 PM

Not only is the BSOZ not patented, it's design would
be considered a trivial example of prior art by the
patent office, as would the other Zen circuits published
to date. Almost as trivial as the stupid net business
models clogging the patent office at this time.

Victor at BAT is what we used to refer to as a gentleman
and a scholar, and if by chance he was inspired by
BSOZ, then I would be flattered.

hifi · 26th January 2002, 03:09 AM

ok...just thougt you ought to know....

/micke

reinhard · 27th January 2002, 08:34 AM

Hello,

i´m in service for BAT since 1997 (not authorized)
and know Victor´s preamps in deatail. he always uses simple Diffamps working on current sources.
The differences are in the Tubes (6922 & 6H30P-DR)
and Fets and the current flowing.
Therefore he called his preamp philosophy "Unistage"

Reinhard

psroczka · 9th April 2002, 06:56 PM

where could I find schema for BAT

reinhard · 10th April 2002, 06:27 PM

Hello,

for schematics ask Victor Khomenko at www.balanced.com.

I would not feel comfortable to give you in house documents.

But where is the problem: Take the BOSOZ and scale it up for tubes. With + - 150 V rails and some 6922 you will get good results.

For further questions do not hesistate to contact me at: in.audio@t-online.de

Reinhard

psroczka · 15th April 2002, 08:14 AM

thanks a lot, I will try

Peter

mullardel34 · 26th April 2010, 08:13 PM

Quote:

Originally Posted by reinhard

Hello,

i´m in service for BAT since 1997 (not authorized) and know Victor´s preamps in deatail. he always uses simple Diffamps working on current sources. The differences are in the Tubes (6922 & 6H30P-DR) and Fets and the current flowing. Therefore he called his preamp philosophy "Unistage"

Reinhard

Interesting; I've often wondered what comprised the fundamental basis for the BAT "Unistage" design. The benchmark results always indicated something a bit more sophisticated than just a high-performance SET (as in the conrad-johnson ART "composite triode" configuration). Does the BAT Unistage use solid-state or vacuum-tube current-sources for the differential pair? Also, does the BAT Unistage use cascode elements on the differential pair and/or the current-sources?

reinhard · 27th April 2010, 05:23 AM

Hello,

the unistage is always a differential amplifier with resistiv anode loads.

For the cathode current sources you find solid state and vacuum tube, depending on model.

have a look at their website, it is very informative.

Reinhard

25th January 2002, 06:07 PM	#1
hifi diyAudio Member Join Date: Mar 2001 Location: sweden	BAT VK30 Bride of son of zen rippoff? i just checked the topology schematic on that preamp...it is a bride of son of zen with tubes...... is it under licens or?... /micke

27th January 2002, 08:34 AM	#5
reinhard diyAudio Member Join Date: Dec 2000 Location: Germany	BAT preamps Hello, i´m in service for BAT since 1997 (not authorized) and know Victor´s preamps in deatail. he always uses simple Diffamps working on current sources. The differences are in the Tubes (6922 & 6H30P-DR) and Fets and the current flowing. Therefore he called his preamp philosophy "Unistage" Reinhard

9th April 2002, 06:56 PM	#6
psroczka diyAudio Member Join Date: Mar 2002 Location: Krakow, Poland	where could I find schema for BAT __________________ peter

15th April 2002, 08:14 AM	#8
psroczka diyAudio Member Join Date: Mar 2002 Location: Krakow, Poland	thanks a lot, I will try Peter __________________ peter

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25th January 2002, 06:21 PM	#2
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	The BOSOZ isn't patented. It's just a nicely executed solid state differential. As such, anyone is free to build one with any sort of gain devices that come to hand. In the meantime, have a look at some of their other schematics and see if you find anything else that looks familiar... Grey

25th January 2002, 07:04 PM	#3
Nelson Pass The one and only Join Date: Mar 2001	Not only is the BSOZ not patented, it's design would be considered a trivial example of prior art by the patent office, as would the other Zen circuits published to date. Almost as trivial as the stupid net business models clogging the patent office at this time. Victor at BAT is what we used to refer to as a gentleman and a scholar, and if by chance he was inspired by BSOZ, then I would be flattered.

26th January 2002, 03:09 AM	#4
hifi diyAudio Member Join Date: Mar 2001 Location: sweden	ok...just thougt you ought to know.... /micke

10th April 2002, 06:27 PM	#7
reinhard diyAudio Member Join Date: Dec 2000 Location: Germany	Hello, for schematics ask Victor Khomenko at www.balanced.com. I would not feel comfortable to give you in house documents. But where is the problem: Take the BOSOZ and scale it up for tubes. With + - 150 V rails and some 6922 you will get good results. For further questions do not hesistate to contact me at: in.audio@t-online.de Reinhard

27th April 2010, 05:23 AM	#10
reinhard diyAudio Member Join Date: Dec 2000 Location: Germany	Hello, the unistage is always a differential amplifier with resistiv anode loads. For the cathode current sources you find solid state and vacuum tube, depending on model. have a look at their website, it is very informative. Reinhard

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