6sn7 electron tube preamp line circuit diagram

Published:2011/4/17 7:29:00 Author:Nicole | Keyword: electron tube, preamp line | From:SeekIC

Used 6SN7 as preamp amplification circuit with negative feedback, the figure is as below. It uses 6S8P electron tube of the dawn in this circuit, high voltage power supply adopts 6Z4 as rectifier, and uses two inflatable tubes as voltage regulator, the filament is AC powered, but the filament ground adopts arms resistance balance method to reduce the communication noise. This circuit is very easy to make, the characteristics of sound is its first class thick and smooth of mediant, but the power is normal and the sound field is weak, it’s unkown whether the intermediate frequency’s performance is too excellent to overshadowed the high and low frequency, its frequency domain extension, dynamics and transient state are not very overstanding, the timbre seems like classic LS3/5A. From the side of Hi-fi, its sound effect is not complete, but it is also pleasurable, especially when we are playing the violin stringed music and person's voice, it is quite satisfying. If this circuit uses the electron tube of the Former Soviet Union’ 6H8C or the US GE’ 6SN7, its power and sound field' analysis can be improved, but the 6SN7 which was made by GE in the 70s is not better than 6H8C in the sound’s smooth, unless we can find the products which are produced in the 60s. Compared to the 6N11 first level cathamplifier and the next SRPP 6N10 preceding stage, its individuality is higher, the medium frequency band is excellent for people auditory impression.



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