Radio Shack brand may return online
The Radio Shack stores played a big role in my childhood. My first memory of Radio Shack is from around 1975 when I was six. I went with my dad when he bought new speaker cables. We went others times whenever our TV stopped working. Dad would take the back cover off, pull out some vacuum tubes, and take them in to Radio Shack to use the tab tester. Sometimes there would be a line for the tester. If the tester said a tube was weak, dad would go over to a counter and ask the man there for a new one.
Source: trincoll.edu