C.E.C AMP3300R (3300 R Amp 3300R Amp3300) and AMP5300R LEF Class A schematic wanted

tiefbassuebertr · 6th November 2009, 06:04 PM

CEC (C.E.C) claim by their mostly amplifier models, it's class A (here in Germany even "Pure Class A") The name of circuit topology is "LEF (Load Effect Free). The developer is Mr. Carlos Candeias. Have a look to this URLs: Amp 3300R:
CEC AMP3300R
and Amp 5300R (Amp5300R Amp 5300R Amp5300)
CEC EUROPE WEBSITE
The last model delivers 120W/8 ohms and 135W/4 ohms, as to read in the CEC datasheet
If anybody can posted the schematic of one of both models, I will make an evaluation. I guess, the term "Pure Class A" is concerning the pre-driver stage and driver stage of a push pull complementary CFP resp. Sziklai pair, but I don't know this exactly.
If there really pure Class A by the output power devices, where is a heatsink with the appropriate sizes?
Thank you very much for your posted schematics in advance

BV · 6th November 2009, 06:32 PM

Power consumption (acording prospect) 65-450W, so no class A..."Ppure class A" is realy valid only for voltage amplifying stage,not for output stage, as in other "normal" amplifiers.Only marketing talks...

tiefbassuebertr · 16th December 2009, 02:45 PM

are there still no schematics?

tiefbassuebertr · 03:26 PM

schematics for this CEC models still needed.

vizion · 31st March 2010, 02:37 AM

I read somewhere the Amp3300 leaves Class A at 10 watts. I don't have schematics though.

tiefbassuebertr · 21st September 2010, 06:06 PM

circuit diagram still needed.

tiefbassuebertr · 27th October 2010, 05:00 PM

are there members, which have one of this amp models in use?

analog_sa · 27th October 2010, 06:04 PM

Quote:

Originally Posted by tiefbassuebertr

circuit diagram still needed.

I have the feeling that this diagram is only available through reverse engineering of one of the modules. Not sure if they are potted or glued inside that red plastic.

The attached document, otoh, may well describe Nelson's "Stasis" output stage or any other "current dumping" topologies.

tiefbassuebertr · 07:16 PM

Quote:

Originally Posted by analog_sa

I have the feeling that this diagram is only available through reverse engineering of one of the modules. Not sure if they are potted or glued inside that red plastic.

The attached document, otoh, may well describe Nelson's "Stasis" output stage or any other "current dumping" topologies.

Yes. Read the statements by post #3 and #5 of our great master about
Cec Amp71
The schematic I need (first to make a cost estimate) for prepare this amp device for connecting of a dual mono outdoor power supply.

tiefbassuebertr · 24th November 2010, 05:42 PM

Are there only a very small amount of pieces of this model and other CEC LEF models in use over the world?

6th November 2009, 06:04 PM	#1
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	C.E.C AMP3300R (3300 R Amp 3300R Amp3300) and AMP5300R LEF Class A schematic wanted CEC (C.E.C) claim by their mostly amplifier models, it's class A (here in Germany even "Pure Class A") The name of circuit topology is "LEF (Load Effect Free). The developer is Mr. Carlos Candeias. Have a look to this URLs: Amp 3300R: CEC AMP3300R and Amp 5300R (Amp5300R Amp 5300R Amp5300) CEC EUROPE WEBSITE The last model delivers 120W/8 ohms and 135W/4 ohms, as to read in the CEC datasheet If anybody can posted the schematic of one of both models, I will make an evaluation. I guess, the term "Pure Class A" is concerning the pre-driver stage and driver stage of a push pull complementary CFP resp. Sziklai pair, but I don't know this exactly. If there really pure Class A by the output power devices, where is a heatsink with the appropriate sizes? Thank you very much for your posted schematics in advance

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6th November 2009, 06:32 PM	#2
BV diyAudio Member Join Date: Sep 2005 Location: Trnava, Slovakia	Power consumption (acording prospect) 65-450W, so no class A..."Ppure class A" is realy valid only for voltage amplifying stage,not for output stage, as in other "normal" amplifiers.Only marketing talks...

16th December 2009, 02:45 PM	#3
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	are there still no schematics?

31st March 2010, 02:37 AM	#5
vizion diyAudio Member Join Date: Apr 2007	I read somewhere the Amp3300 leaves Class A at 10 watts. I don't have schematics though.

21st September 2010, 06:06 PM	#6
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	circuit diagram still needed.

27th October 2010, 05:00 PM	#7
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	are there members, which have one of this amp models in use?

24th November 2010, 05:42 PM	#10
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	Are there only a very small amount of pieces of this model and other CEC LEF models in use over the world?

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