Product code: Two huge ham radio popular vacuum tubes
These tubes were both made by a Rex. They appear to be the same size. Each of them has four pins on the popular bottom and one huge contact at the top. One of them is a – 21 and the other one is 211 – D. One of them has a brass base.
These tubes were both made by a Rex. They appear to be the same size. Each of them has four pins on the popular bottom and one huge contact at the top. One of them is a – 21 and the other one is 211 – D. One of them has a brass base.