I am trying to build a tube amp without using any semiconductors (just for the fun of it, trying to make it using the technology that was available when tube amps were mainstream). I may need to control some relays in it, however, I cannot figure out how, or rather, how to do it properly.
I have some thyratrons (both hot and cold cathode) and obviously some vacuum tubes. I may have to:
- turn a relay on or off with a pulse (like a push button)
- Switch between two relays (one off one on)
- have a relay turn on for some time then turn off (shorting the output of the amp for a few seonds to avoid a pop when switching inputs etc).
How do I do it without semiconductors? I currently do not have a specific application in mind, just looking to learn more.