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-   -   C.E.C AMP3300R (3300 R Amp 3300R Amp3300) and AMP5300R LEF Class A schematic wanted (http://www.diyaudio.com/forums/solid-state/154546-c-e-c-amp3300r-3300-r-amp-3300r-amp3300-amp5300r-lef-class-schematic-wanted.html)

tiefbassuebertr 6th November 2009 06:04 PM

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

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 29th March 2010 03:13 PM

5 Attachment(s)
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 (Post 2310161)
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 27th October 2010 07:14 PM

Quote:

Originally Posted by analog_sa (Post 2345622)
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
http://www.diyaudio.com/forums/pass-...cec-amp71.html
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?


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