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Old 5th January 2009, 10:11 AM   #101
Stee is offline Stee  Italy
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Default another example

with Hexfet and OPA 604
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Old 6th January 2009, 10:49 AM   #102
catalin is offline catalin  Romania
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Default simply

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 .
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Old 6th January 2009, 12:09 PM   #103
Stee is offline Stee  Italy
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Default Catalin you are a genius

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


see this
http://www.amb.org/audio/beta22/
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Old 6th January 2009, 01:20 PM   #104
catalin is offline catalin  Romania
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Yes Stee you can put a pair of fet and remove the 2*100ohms resistor.
I change the 2*10pF into 12pF,18pF
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Old 6th January 2009, 01:31 PM   #105
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Default thanks catalin

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

thank you
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Old 6th January 2009, 07:36 PM   #106
Stee is offline Stee  Italy
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Default Wonderfull Sziklai Driver

see version 5
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Old 6th January 2009, 07:43 PM   #107
PMA is offline PMA  Europe
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My 12 cents to Sziklai, one channel class A out-of-FBloop output stage:
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Old 6th January 2009, 08:43 PM   #108
catalin is offline catalin  Romania
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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).
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Old 6th January 2009, 08:44 PM   #109
Stee is offline Stee  Italy
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Default 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
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Old 6th January 2009, 08:48 PM   #110
catalin is offline catalin  Romania
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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
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