Commercial Audio Brands: N-Ch/NPN only output devices in a pushpull AB power follower
Typical MOSFET's for true complementary output stages are obsolete in any cases after few years. Good known examples are the Hitachi's 2SK135/2SJ50 and a currently example Toshiba's 2SK1529/2SJ200 - go to
http://www.diyaudio.com/forums/pass-labs/160956-fyi-toshiba-2sk1529-2sj200-reached-eol.html.
Independend of this - such true complementary MOSFET devices more suited for "Would-be" developers than real audio engineers (at least in this days). Perhaps this could be the reason for the short time of availability of such pairs of MOSFET's.
Therefore it is for me of interest to work with commercial brands audio components without the use of so called "true complementary" output stages, especially by MOSFETs to avoid later by service the complicated search of "Hard to Find" types and to avoid unwanted and complicated mods and tweaks for the use of good available power devices.
about
http://www.diyaudio.com/forums/soli...better-audio-non-complements-audio-power.html
I have listed an URL overview arround various topologies concerning such followers.
but it seems to be very hard to find commercial brands uses such followers.
Here my small overview:
1) Creek (e. g. 5350)
http://www.ant-audio.co.uk/Theory/N-channel D-MOSFET output stage with improved linearity.pdf
http://www.diyaudio.com/forums/solid-state/14320-n-channel-only-output-devices-power-follower.html
2) Zeus Power Amplifier (transformer based)
Zero Feedback Transformer Audio Power Amplifier
http://www.diyaudio.com/forums/solid-state/42259-zero-feedback-impedance-amplifiers.html
3) NAD , eg 306 (who knows currently available successor model No?)
http://195.84.101.101/~goranl/projects/nad_stereo/NAD_306.pdf
http://www.diyaudio.com/forums/soli...better-audio-non-complements-audio-power.html (PDF attachement post #1)
4) QSC power light 6.2
http://www.diyaudio.com/forums/soli...better-audio-non-complements-audio-power.html ( post #14-#16)
http://www.qscaudio.com/support/library/schems/Discontinued/PowerLight Series/PL9.0PFC.pdf
5) www_aussieamplifiers_com
based on Olsson "Only N-Channel", transistor phase splitting driver stage
Original article: Better Audio from non complements? from Bengt Olsson (B. Olson?)
Electronics World + Wireless World, December 1994 page 988
http://www.amplimos.it/images/N-CH1.JPG
6) Krohn Hite 7500
http://pws.prserv.net/demian/Krohn-Hite/Krohn-Hite-7500.pdf
Very few brands. Who will help me to expand this list of brands?
Typical MOSFET's for true complementary output stages are obsolete in any cases after few years. Good known examples are the Hitachi's 2SK135/2SJ50 and a currently example Toshiba's 2SK1529/2SJ200 - go to
http://www.diyaudio.com/forums/pass-labs/160956-fyi-toshiba-2sk1529-2sj200-reached-eol.html.
Independend of this - such true complementary MOSFET devices more suited for "Would-be" developers than real audio engineers (at least in this days). Perhaps this could be the reason for the short time of availability of such pairs of MOSFET's.
Therefore it is for me of interest to work with commercial brands audio components without the use of so called "true complementary" output stages, especially by MOSFETs to avoid later by service the complicated search of "Hard to Find" types and to avoid unwanted and complicated mods and tweaks for the use of good available power devices.
about
http://www.diyaudio.com/forums/soli...better-audio-non-complements-audio-power.html
I have listed an URL overview arround various topologies concerning such followers.
but it seems to be very hard to find commercial brands uses such followers.
Here my small overview:
1) Creek (e. g. 5350)
http://www.ant-audio.co.uk/Theory/N-channel D-MOSFET output stage with improved linearity.pdf
http://www.diyaudio.com/forums/solid-state/14320-n-channel-only-output-devices-power-follower.html
2) Zeus Power Amplifier (transformer based)
Zero Feedback Transformer Audio Power Amplifier
http://www.diyaudio.com/forums/solid-state/42259-zero-feedback-impedance-amplifiers.html
3) NAD , eg 306 (who knows currently available successor model No?)
http://195.84.101.101/~goranl/projects/nad_stereo/NAD_306.pdf
http://www.diyaudio.com/forums/soli...better-audio-non-complements-audio-power.html (PDF attachement post #1)
4) QSC power light 6.2
http://www.diyaudio.com/forums/soli...better-audio-non-complements-audio-power.html ( post #14-#16)
http://www.qscaudio.com/support/library/schems/Discontinued/PowerLight Series/PL9.0PFC.pdf
5) www_aussieamplifiers_com
based on Olsson "Only N-Channel", transistor phase splitting driver stage
Original article: Better Audio from non complements? from Bengt Olsson (B. Olson?)
Electronics World + Wireless World, December 1994 page 988
http://www.amplimos.it/images/N-CH1.JPG
6) Krohn Hite 7500
http://pws.prserv.net/demian/Krohn-Hite/Krohn-Hite-7500.pdf
Very few brands. Who will help me to expand this list of brands?
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