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14th January 2012, 12:59 PM
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diyAudio Member
Join Date: Feb 2009
Location: Melbourne, Oz
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PP driver stage with local feedback
Can anyone point to any early amps with a similar PP driver configuration between the PI stage and the cathode-biased PP output stage, as shown in the attached instrument amp (Selmer organ 1957). I've only seen push-pull drivers without local feedback (eg. around the 6SN7 V13). Maybe they were just being pedantic about low distortion.
http://dalmura.com.au/projects/Selme...0schematic.pdf Ciao, Tim |
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