Balanced audio technology VK500/1000: "Single-Ended Bridge" Topology, 450W into 4 Ohm - diyAudio
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Old 5th May 2011, 09:57 PM   #1
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Default Balanced audio technology VK500/1000: "Single-Ended Bridge" Topology, 450W into 4 Ohm

About
http://www.balanced.com/resources/br.../VK500desc.pdf
I read:
A typical solid-state amplifier
will have four or five gain stages, with a feedback loop traversing these same
stages to correct the signal. The VK-500 uses only two gain stagesówithout
global feedback. Unusually direct for any amplifier, this purist signal path is even
more surprising in a design of such high power. The ingenuity of the signal
path is complemented by a unique single-ended bridge topology that allows the
use of superior N-channel MOSFETs in both driver and output stages. The
result is a clear, open sound that breathes life into music.

This sounds like a design from Mr. Nelson Pass.
Also the review about
Balanced Audio Technology VK-500 Reviews
and
Product Review
Perhaps a transition from a "ZEN"-topology to a "CSPP" (Circlotron)??
Who knows more about BAT's topology?
Attached Images
File Type: jpg BAT VK-500 front view, on-status.jpg (19.7 KB, 437 views)
File Type: jpg BAT VK-500 front view.jpg (41.4 KB, 429 views)
File Type: jpg BAT VK-500 rear view.jpg (76.2 KB, 430 views)
File Type: jpg BAT VK-500 top view II.jpg (68.5 KB, 434 views)
File Type: jpg BAT VK-500 top view.jpg (55.5 KB, 428 views)
File Type: jpg BAT VK-1000 front view.jpg (112.0 KB, 178 views)

Last edited by tiefbassuebertr; 5th May 2011 at 10:01 PM.
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Old 8th May 2011, 06:04 PM   #2
banat is offline banat  Serbia
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Yes , it is always employed Balanced Bridge / PPP ( Circlotron ) topology inside of this ( Viktor`s ) BAT SS or Tube PP Amp .

Best Regards
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Old 10th August 2011, 10:12 PM   #3
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are anywhere schematics for download?
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Old 10th August 2011, 10:54 PM   #4
mr l is offline mr l  Australia
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like krell, they don't release schematics. good luck!
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Old 12th August 2011, 12:24 AM   #5
a.wayne is offline a.wayne  United States
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Had a Pr ... not a fan .....................
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Old 12th August 2011, 06:34 PM   #6
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Quote:
Originally Posted by mr l View Post
like krell, they don't release schematics. good luck!
I don't need a detailled schematic diagram, only a simlified schematic like that one from the Pass Aleph on page 5 about
http://peufeu.free.fr/audio/schemas/Pass_Aleph_3.pdf
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Old 12th August 2011, 10:25 PM   #7
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The phrase "balanced single-ended", first used IIRC by Bel Canto, and an
oxymoron if there ever was one, is nevertheless pretty descriptive.

It is likely:

1) Circlotron, either Common-Drain or Common-Source.

2) Two conventional single-ended output stages operated in balanced mode,
either Common-Drain or Common-Source, biased by a CCS or variable
current source.

3) If the product is advertised as lacking global feedback, then it very likely
is a Common-Drain version of 1 or 2



(Fet pin references. Your pins may vary)
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