a wonderfull sziklai - Page 11

Stee · 5th January 2009, 09:11 AM

with Hexfet and OPA 604

catalin · 6th January 2009, 09:49 AM

Joy 200 v4 .Testing ...
Slew rate 150V/uS ,Thd(Pout>20W,1khz-20khz,5 harm) =0.0003%
here have been improvements: the thermal regime, phase reserve, THD, slew
rate, TID, the driver failure, etc.
Outputs is still enjoying the benefits of sziklai .

Stee · 6th January 2009, 11:09 AM

can put a pair of FETs on input?
do you sell PCB on EBay?

see this
http://www.amb.org/audio/beta22/

catalin · 6th January 2009, 12:20 PM

Yes Stee you can put a pair of fet and remove the 2*100ohms resistor.
I change the 2*10pF into 12pF,18pF

sakis · 6th January 2009, 12:31 PM

for still working with the wonderfull sziklai and also its very welcome and nice to see updates and improovements

thank you

Stee · 6th January 2009, 06:36 PM

see version 5

PMA · 6th January 2009, 06:43 PM

My 12 cents to Sziklai, one channel class A out-of-FBloop output stage:

catalin · 6th January 2009, 07:43 PM

Stee last year I was 2 times in Milan.

I still don't belive that is better to get rid with 47uF capacitor.The error voltage (in output ) will be splited by 22k/680 so in dc the V offset will be bigger(volts).

Stee · 6th January 2009, 07:44 PM

can we know more about your CFP amp?

Catalin
in my amp I always delete DC offset CAP
drift maximum 0.4V
sound much better

when you are here can listen

catalin · 6th January 2009, 07:48 PM

Quote:

Originally posted by catalin
Stee last year I was 2 times in Milan. I still don't belive that is better to get rid with 47uF capacitor.The error voltage (in output ) will be splited by 22k/680 so in dc the V offset will be bigger(volts).

The error voltage(dc offset) will compare the output voltage by a factor of 22k/680 since in output we don't have an voltage divider.Pls show your schematic

6th January 2009, 12:31 PM	#105
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	thanks catalin for still working with the wonderfull sziklai and also its very welcome and nice to see updates and improovements thank you __________________ SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

6th January 2009, 07:44 PM	#109
Stee diyAudio Member Join Date: Jul 2005 Location: milan	PMA you are a GURU can we know more about your CFP amp? Catalin in my amp I always delete DC offset CAP drift maximum 0.4V sound much better when you are here can listen __________________ Please download my best audio idea http://www.esafono.it/ISY.zip

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6th January 2009, 07:43 PM	#108
catalin diyAudio Member Join Date: Jun 2007	Stee last year I was 2 times in Milan. I still don't belive that is better to get rid with 47uF capacitor.The error voltage (in output ) will be splited by 22k/680 so in dc the V offset will be bigger(volts).