https://blog.spacehey.com/user?id=2041559The most recent Blog Entries by the User "Karl Ferdinand Braun" on SpaceHeyhttps://blog.spacehey.com/entry?id=909523https://blog.spacehey.com/entry?id=909523I was just thinking how it would be super handy to have a vacuum Tube that could hold electron guns. This is a sketch I've been woriking on.  "> Thu, 28 Sep 2023 21:33:55 +0000