Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

They are in-14 tubes. I bought a kit on ebay that came with used tubes. Kit was @$70. Hardest part was getting the leads on the used tubes straightened out and onto the board. If i can find the link, i will share it.
I remember having  radios with the "magic eye" tuning. I think we,re telling our age!
Crazydoug