The article “A High-Power Diode–Dynistor Generator for Gas-Discharge Technologies”, written by S. V. Korotkov and A. L. Zhmodikov, was originally published electronically in Springer-Link on 14 September 2021 without Open Access. After publication in volume 64, issue 5, pages 683-686 the authors decided to make the article an Open Access publication. Therefore, the copyright of the article has been changed to © The Author(s) 2021 and the article is forthwith distributed under the terms of a Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/, CC BY), which permits use, duplication, adaptation, distribution and reproduction of a work in any medium or format, as long as you cite the original author(s) and publication source, provide a link to the Creative Commons license, and indicate if changes were made.