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east electronics 19th December 2008 11:14 AM

a wonderfull sziklai
found this schematic in a greek forum ...really dont know where is it coming from and since i am crazy about these amps i thought about posting the schematic to get opinions from other users about it ...


AndrewT 19th December 2008 11:26 AM

I can't see a schematic.
Did you test your posting link?

east electronics 19th December 2008 11:38 AM

yes i did ....
check again andrew please and let me know

( characters are blue so link is active )


Markus2006 19th December 2008 11:42 AM

You need to (at least) register to this forum to see the attachment.


AndrewT 19th December 2008 11:43 AM

I can't read the text/instructions, but I'm guessing it's asking me to log in and/or register.
No schematic.

Did you test your posting link?

fotios 19th December 2008 12:11 PM


The same for me...


east electronics 19th December 2008 12:15 PM

ops.... will see to tah right away

east electronics 19th December 2008 12:19 PM

sorry guys
2 Attachment(s)
there you go

AndrewT 19th December 2008 01:34 PM

2pair of 1943/5200 on 56Vdc supplies cannot reliably drive a 4ohm speaker.
Even an 8ohm speaker would need to be of moderate reactance to keep this output stage reliable.
It will drive a 12ohm severe reactance speaker.

reduce the supply voltage <=50Vdc

and get rid of those 5401 in the input LTP and the driver being used as a VAS.

ostripper 19th December 2008 01:42 PM

Good OP stage, here is comparison..

EF type 2..

Sakis CFP..

SAme amp 2 different OPS's

thanks, always wanted to build CFP. might as well start here..

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