I use to watch a TV like that when I was a kid. oops, dating myself. lol
The days of vacuum tubes are all but gone with the exception of guitar amplifiers, etc. and digital tech is rapidly gaining the ability to reproduce tube characteristics. In fact they are just about all the way there now.
Register for free to join our community of investors and share your ideas. You will also get access to streaming quotes, interactive charts, trades, portfolio, live options flow and more tools.