An amplifier with no output transformer is described. The output stage is single ended, and the tubes are connected in series. The cathode-coupled phase-inverter drive is used to drive the output stage. An analysis of the driver circuit is followed by a description of the amplifier and its performance. With 20 db of negative feedback, frequency response is flat to 30 kc, down only 1.5 db at 100 kc. A power output of 3 watts is obtained into a 600-ohm load with an input signal of 0.8 volt. Intermodulation distortion is only 0.7% at 3 watts.

Author: Amemiya, Hiroshi
Affiliation: University of Tokyo, Bunkyo-ku, Tokyo, Japan
JAES Volume 4 Issue 2 pp. 72-75; April 1956
Publication Date: April 1, 1956

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.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

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.