DIY vacuum tube prototyping board

Bruce Heran writes:
This is a project that I made to take care of an ever increasing need to prototype vacuum tube (valve) circuits. As you can see from the photos, it really is a test “board”. I do a lot of work with tubes and love to design and improve circuits. In the process I often use various CAD type programs to rough out the designs.
DIY vacuum tube prototyping board - [Link]










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