Conversion of Hiraga's "Le Monstre" to a Circlotron

tiefbassuebertr · 27th June 2009, 10:41 AM

Hallo together

the original circuit is mirror symmetric between pos and neg halves (so called "true complementary push pull") but in real life I missed the symmetric behavior - see foto about clipping
"Photograph 6: Stability at Clipping - 1kHz into 8ohms " by URL
http://diyaudioprojects.com/Solid/Je...ga-Le-Monstre/ (scoll down, last photo)
If you compare the rising edge of lower half to the falling edge of upper half, you see the different.
Additional the 300 KHz Sine Waves are more like a sawtooth, what is bad omen (no low IM distortion at high frequencies)
How I can I convert Hiraga's "Le Monstre" to a CSPP version (cross shunted push pull)? By the output stages allone I haven't problem (there are some examples on this forum), but include the input stage I don't find solutions.
Thank you very much for your advices

tiefbassuebertr · 20th November 2009, 09:53 AM

really no idea?

Lumba Ogir · 20th November 2009, 07:48 PM

Gentle clipping:

tiefbassuebertr · 23rd November 2009, 12:26 PM

Quote:

Originally Posted by Lumba Ogir

Gentle clipping:

Thank you for this schematic, that you have download from
2SJ18 CSPP Power Amplifier
There are more interesting topologies on this website:
Evolve Power Amplifiers
But nothing to find about SRPP input stages for voltage amplifier gain stages

Lumba Ogir · 23rd November 2009, 09:29 PM

tiefbassuebertr,
where and why on earth would you use SRPP input stages for voltage amplifier gain stages?

tiefbassuebertr · 23rd November 2009, 09:59 PM

Lumba Ogir, for a maximal symetric behavior and CMR without LTP. But I think, the version of Nelson Pass match this requirement.

Lumba Ogir · 23rd November 2009, 10:25 PM

Do you really intend to build something?

Stee · 06:57 PM

need just half amp - a rail for two times

tiefbassuebertr · 26th April 2011, 11:32 AM

the topology by post #49 about
Experimental Design - Comments, Flames Welcome
could be the appropriate solution

lineup · 12:28 PM

Quote:

Originally Posted by tiefbassuebertr

But nothing to find about SRPP input stages for voltage amplifier gain stages

Elektor has got a couple of projects using JFET, I think, in SRPP.
One is an headphone amplifier. The other maybe preamp.
I will try to search our forum.

Following topics:

Quote:

Veena - An Experimental SRPP Amplifier
shaan

SRPP (something like in the world of vacuum tubes) in solid state audio aplications
Bojan Hajdinjak

SRPP with FETS, what output stage?
davidallancole

jfet srpp preamp
yves

27th June 2009, 10:41 AM	#1
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	Conversion of Hiraga's "Le Monstre" to a Circlotron Hallo together the original circuit is mirror symmetric between pos and neg halves (so called "true complementary push pull") but in real life I missed the symmetric behavior - see foto about clipping "Photograph 6: Stability at Clipping - 1kHz into 8ohms " by URL http://diyaudioprojects.com/Solid/Je...ga-Le-Monstre/ (scoll down, last photo) If you compare the rising edge of lower half to the falling edge of upper half, you see the different. Additional the 300 KHz Sine Waves are more like a sawtooth, what is bad omen (no low IM distortion at high frequencies) How I can I convert Hiraga's "Le Monstre" to a CSPP version (cross shunted push pull)? By the output stages allone I haven't problem (there are some examples on this forum), but include the input stage I don't find solutions. Thank you very much for your advices

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20th November 2009, 09:53 AM	#2
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	really no idea?

23rd November 2009, 09:29 PM	#5
Lumba Ogir Banned Join Date: Apr 2005 Location: Stockholm	tiefbassuebertr, where and why on earth would you use SRPP input stages for voltage amplifier gain stages?

23rd November 2009, 09:59 PM	#6
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	Lumba Ogir, for a maximal symetric behavior and CMR without LTP. But I think, the version of Nelson Pass match this requirement.

23rd November 2009, 10:25 PM	#7
Lumba Ogir Banned Join Date: Apr 2005 Location: Stockholm	Do you really intend to build something?

26th April 2011, 11:32 AM	#9
tiefbassuebertr diyAudio Member Join Date: Jul 2005 Location: D-55629 Schwarzerden	the topology by post #49 about Experimental Design - Comments, Flames Welcome could be the appropriate solution

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