A tube tester that uses tubes; there's a Catch 22. dr At 20:21 08-04-97 -0700, you wrote: >Hi all, > >Trying to bring a Hickok 539A tube tester back to life. Thought replacing the >two tubes would do it, but...... So, I am in need of a manual/copy. > >THANKS!!!! Kevin KG9IL > >