Conversion of Hiraga's "Le Monstre" to a Circlotron - diyAudio
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Old 27th June 2009, 10:41 AM   #1
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Default 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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Old 20th November 2009, 09:53 AM   #2
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really no idea?
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Old 20th November 2009, 07:48 PM   #3
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Gentle clipping:
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File Type: gif 2SJ18_CSPP.gif (7.1 KB, 864 views)
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Old 23rd November 2009, 12:26 PM   #4
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Quote:
Originally Posted by Lumba Ogir View Post
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
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Old 23rd November 2009, 09:29 PM   #5
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tiefbassuebertr,
where and why on earth would you use SRPP input stages for voltage amplifier gain stages?
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Old 23rd November 2009, 09:59 PM   #6
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Lumba Ogir, for a maximal symetric behavior and CMR without LTP. But I think, the version of Nelson Pass match this requirement.
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Old 23rd November 2009, 10:25 PM   #7
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Do you really intend to build something?
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Old 6th January 2010, 06:52 PM   #8
Stee is offline Stee  Italy
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Default no problem - cut and paste is my first quality

need just half amp - a rail for two times
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File Type: png BJT CICLOTRON.PNG (66.9 KB, 736 views)
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Last edited by Stee; 6th January 2010 at 06:57 PM.
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Old 26th April 2011, 11:32 AM   #9
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the topology by post #49 about
Experimental Design - Comments, Flames Welcome
could be the appropriate solution
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Old 26th April 2011, 12:24 PM   #10
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Quote:
Originally Posted by tiefbassuebertr View Post
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
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