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"Push-Pull" for push und "Push-Pull" for pull (like Gamnut) - whats the right name?
"Push-Pull" for push und "Push-Pull" for pull (like Gamnut) - whats the right name?
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Old 2nd June 2010, 02:17 PM   #11
Nrik is offline Nrik  Denmark
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Tiefbassbertr輍er

From the internet:
"Complementary is the adjective form of the word "complement." It means forming a whole or integrating to perfection or completion."
"A precise pairing of organic compounds pyrimidines and purines between the strands of RNA molecule or a DNA molecule in the world of bio-chemistry is also called as complementary. "

...I would say that in electronics a complementary pair is an NPN and a PNP (or n-channel and p-channel) that handles the positive and the negative cycle respectively, complementing eachother.

Quasi means "almost" ( ask Telstar - its Italian ), and I would say that if you say "almost complementary", it would basically just describe the use of the two similar devices in positive and negative cycle, wich in the end-result complements eachother.

Anyway - I don't think that there are any specific terms, that HAS to be used scientifically or legally when describing a schematic - it is just helpfull if you were to desribe and categorize different topologies for a specific reason.
So if you fancy another name for this circuit, then please call it whatever you like!
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Henrik
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Old 2nd June 2010, 03:02 PM   #12
Telstar is offline Telstar  Italy
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Quote:
Originally Posted by Nrik View Post
Quasi means "almost" ( ask Telstar - its Italian )
Exactly
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Old 2nd June 2010, 08:04 PM   #13
tiefbassuebertr is offline tiefbassuebertr  Germany
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Quote:
Originally Posted by Nrik View Post
Tiefbassbertr輍er

From the internet:
"Complementary is the adjective form of the word "complement." It means forming a whole or integrating to perfection or completion."
"A precise pairing of organic compounds pyrimidines and purines between the strands of RNA molecule or a DNA molecule in the world of bio-chemistry is also called as complementary. "

...I would say that in electronics a complementary pair is an NPN and a PNP (or n-channel and p-channel) that handles the positive and the negative cycle respectively, complementing eachother.

Quasi means "almost" ( ask Telstar - its Italian ), and I would say that if you say "almost complementary", it would basically just describe the use of the two similar devices in positive and negative cycle, wich in the end-result complements eachother.

Anyway - I don't think that there are any specific terms, that HAS to be used scientifically or legally when describing a schematic - it is just helpfull if you were to desribe and categorize different topologies for a specific reason.
So if you fancy another name for this circuit, then please call it whatever you like!
This I know all
Complement - Wikipedia, the free encyclopedia
quasi- - Wiktionary
But you do not distinguish between exact definition and colloquial term meaning (here in electronics/audio amp output power stages):
Sziklai pair - Wikipedia, the free encyclopedia
But we are in mean time "off-topic" (please read first post).

ANADIGIT: The SiriuS D100 was mentioned about this URL's:
HIFI4ALL.DK Forum: Valg af forst熳ker?
http://www.faktiskt.se/modules.php?n...wtopic&p=22913

I have found about Sirius also the model No D200 and DMS100
What system are you running??? - Classical Music Forums - Talk Classical

and here the relationship report between SiriuS and GamuT
GamuT D200

GamuT diyaudio
FS: GAMUT D200 MKIII (cloned) kits set
Gamut audio
gamut amp
The clone kits you will find from a wide range good known amps by the keyword "clone Amp" (about ebay), even one "First Watt" model. But don't buy such stuff, because nobody know exactly about the device quality standart !!!

Last edited by tiefbassuebertr; 2nd June 2010 at 08:17 PM.
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Old 3rd June 2010, 05:57 AM   #14
ANADIGIT is offline ANADIGIT  Europe
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Hi,
Could I contact anyone to buy this gamut kits ?
I guess this schematic was Cascode Quasi Complementary.

Thanks
Anadigit
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Old 3rd June 2010, 08:24 AM   #15
analog_sa is offline analog_sa  Europe
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"Push-Pull" for push und "Push-Pull" for pull (like Gamnut) - whats the right name?
Quote:
Originally Posted by ANADIGIT View Post
this schematic and PCB was stolen from service department by old worker


Serves them right for employing old people
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Old 3rd June 2010, 09:08 AM   #16
tiefbassuebertr is offline tiefbassuebertr  Germany
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I recall to a patent paper concerning this topology. Here was mentioned the very low output impedance for driving even very high capacity loads of the output stage MOSFETs (by low driver stage idle current at the same time).
Also a very memorable term was mentioned therefore (that I hope to find out in this thread), but I don't recall that and don't recall the name of the inventor.
Actually Gamut must know it (also Mr. Nelson Pass - so I think).
The pdf schematic from #1 (voltamp.pdf) I have found about
http://wunderkis.de/voltamp/index.html.
This amp runs with +/-320V (!!), more than the most tube amps.

Last edited by tiefbassuebertr; 3rd June 2010 at 09:18 AM.
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Old 4th June 2010, 01:14 AM   #17
ANADIGIT is offline ANADIGIT  Europe
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Default No reply

I mailed to Analogguy but he never reply me I think he gone out of this site so long time ago (I check from his latest posted) but yesterday I found someone in Taiwan talk to this amplifier and show his cloned : and mailde to him.

MyAV視聽商情網 - Avantgarde討論區

He told me this PCB was a groupbuy in Taiwan for 4-5 years ago, So now I waiting for a link

Regard
Anadigit
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Old 4th June 2010, 02:53 PM   #18
ANADIGIT is offline ANADIGIT  Europe
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Need groupbuy ?

GamuT D200 MKIII Amplifier: FREE SHIPPING, MAKE OFFER! on eBay (end time 19-Jun-10 16:44:53 BST)
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Old 4th June 2010, 05:19 PM   #19
tiefbassuebertr is offline tiefbassuebertr  Germany
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Default Various Circuit descriptions:

Quote from
GamuT D200 MK lll Muscle Power
Each output device is driven by a Class A push-pull amplifier, which can charge the gate up and down. The driver stage has a voltage source 15V higher than the output device voltage rail to help control the MOSFET when approaching maximum output. Power source is a 50OVA toroidal transformer with 30,00OgF of reservoir capacitance for each channel.

Given the high current capacity of the MOSFET devices, the limit on output is set by a sophisticated protection circuit with current and thermal sensors. For standard production, the limit is set for full output into a 1.5 ohm load. Panel and electrostatic speakers which dip down to 1 ohm impedance can still be driven; only transients which exceed the current protection limit will momentarily cause the Gamut to mute. The MOSFET package can dissipate 500W of heat into the aluminium case, chosen for its non-magnetic properties and thermal conduction. Finned heatsinks down each side keep the D200 running cool, even though there is a 130W of standing current, forcing the output stage into Class A operation for lower level signals.


Ouote from post #34 "Workhouse"
http://www.diyaudio.com/forums/solid...y-aware-4.html
Hi lumanauW,
Our topology is quasi-complementary, but with individual push-pull drivers.
We Dont know whether we pioneer IGBT's in audio amps or not, but one thing is for sure that we want to become the first professional amp manufacturer in this world to implement N-channel IGBT in Professional amp for PA use.
The Sound is totally different from the mosfets and certainly from the bipolars. The main difference is of damping factor which is around 1000 in our case and thats true indeed.


Quote from post #20 (Yamaha B2) about
VFET revisited - Page 2 - AudioKarma.org Home Audio Stereo Discussion Forums
The output stage consists of eight individually powered VMOS-FET output amplifiers. This precision amplifier array features individual push-pull drivers, high-speed power supplies and individual biasing to function as a single ultra-fast, high current output section. The result of these techniques is unprecedented fast settling and remarkable intertransient silence.

Here the Yamaha "B-2" thread:
http://www.diyaudio.com/forums/solid...aha-b-2-a.html

Last edited by tiefbassuebertr; 4th June 2010 at 05:24 PM.
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