A customer that purchased my 12AX7 vacuum tube breadboard adapters, years ago, recently sent me an image of how he is using it. He's doing some radio / audio circuits. We won't hold the radio part against him!
No matter what the application is it's always great to see these old PCB designs in action. Many thanks for permission to share your image.
If you are interested in vacuum tube breadboard adapters just leave a comment and I will get back with you. Quantities are starting to get scarce but I still have some left from my original PCB run back in 2007.
Thanks for reading,