what is name of this power amlifier?

yeylagh · 30th December 2008, 11:15 PM

hi.
do anyone know what is the name of this power amlifier?
please send me any information you have know?

thespeakerguy · 2nd January 2009, 06:27 AM

Don't recognize it. It has a very interesting output stage though. Nice symmetry.

Samuel Jayaraj · 2nd January 2009, 08:45 AM

This is the 60W Bipolar amp published by Elektor, designed after their Crescendo and Mini-Crescedo success. With a 35volt supply it produces 40 watts into 8 ohms and 60 watts into 4 ohms. THD is rated at 0.01%, 20Hz to 20KHz.

As per your diagram, T9/T11 and Q2/T12 should be thermally coupled. From memory I recall that P1 is a 100 ohm preset which should be set to minimum resistance at power on and increased to set Iq which can vary between 50mA and 100mA. Sounded good for the times but many of today's designs sound a lot better.

fotios · 2nd January 2009, 12:15 PM

Hi yeylagh

This circuit is an exact copy of that included in the project library of EDWin XP1.xx CAD-CAE software which i use.
In EDWinXP (Visionics of India) it used for SPICE demonstration, the named EDSpice simulator.
For any query i am available as usually.

Fotios

2nd January 2009, 08:45 AM	#3
Samuel Jayaraj diyAudio Member Join Date: May 2001 Location: Bangalore, India	This is the 60W Bipolar amp published by Elektor, designed after their Crescendo and Mini-Crescedo success. With a 35volt supply it produces 40 watts into 8 ohms and 60 watts into 4 ohms. THD is rated at 0.01%, 20Hz to 20KHz. As per your diagram, T9/T11 and Q2/T12 should be thermally coupled. From memory I recall that P1 is a 100 ohm preset which should be set to minimum resistance at power on and increased to set Iq which can vary between 50mA and 100mA. Sounded good for the times but many of today's designs sound a lot better. __________________ Sam

2nd January 2009, 12:15 PM	#4
fotios diyAudio Member Join Date: Feb 2007 Location: ΔΡΑΜΑ - North Greece	From luck! Hi yeylagh This circuit is an exact copy of that included in the project library of EDWin XP1.xx CAD-CAE software which i use. In EDWinXP (Visionics of India) it used for SPICE demonstration, the named EDSpice simulator. For any query i am available as usually. Fotios

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2nd January 2009, 06:27 AM	#2
thespeakerguy diyAudio Member Join Date: Feb 2001 Location: Silicon Valley	Don't recognize it. It has a very interesting output stage though. Nice symmetry.

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