I dig my tube boxes and found this old tube. Not a really expensive or most wanted tube, yeah… just an old Western Electric 393A tube. It’s a Argon and Mercury Vapor filled Thyratron tube. According to the datasheet, the...

One factor that makes me like tube is its glow. Well, it’s hard to explain, but some tubes have a beautiful color, especially in dark room. Here is some of them. Below is the 0A3/VR75 tube. It has red/fire color....