An Output-Transformerless Amplifier

Amemiya H. An Output-Transformerless Amplifier. J Audio Eng Soc. 1956;4(2):72-75. Available from: https://aes.org/publications/elibrary-page/?id=304

@article{Amemiya1956_304,
  author = {Amemiya, Hiroshi},
  title = {{An Output-Transformerless Amplifier}},
  journal = {Journal of the Audio Engineering Society},
  volume = {4},
  number = {2},
  pages = {72--75},
  year = {1956},
  month = apr,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=304}
}

TY  - JOUR
TI  - An Output-Transformerless Amplifier
AU  - Amemiya, Hiroshi
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 4
IS  - 2
SP  - 72
EP  - 75
PY  - 1956
DA  - 1956/04/06
UR  - https://aes.org/publications/elibrary-page/?id=304
PB  - Audio Engineering Society
LA  - en
AB  - 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.
ER  -