Untitled attachment
https://mastodon.radio/system/media_attachments/files/112/463/342/151/106/451/original/85fe0233bfa073e8.jpg
Klystron oscillator with a big cavity in a trashed spectrum analyzer.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.