An amplifier circuit using miniature tubes and no output transformer is described. Large amounts of negative feedback are used to reduce distortion to low values. The output stage is single-ended, with the tubes connected in series and working as cathode followers. A new method of symmetrically driving the output tubes from a phase-splitter tube is shown. Positive feedback from the output load to the input of the phase splitter is used. Three models of such amplifiers built by the author are described. Two of these produce an output of 10 watts each into a 16-ohm voice coil, and the third amplifier delivers 20 watts of power. Less than 0.1% harmonic distortion is claimed.
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.
