Well, here it is: the data sheet for the Junior Te-50 tube tester. Also known as the Lafayette Te-50.
It is a very simple tube tester. I think it switches all the tubes as diodes.
The data sheet is perhaps a bit obsolete, because the use of this apparatus is very simple.
Basicly it works like this:
All the switches should be switched to "K", only one of the heater pins should be set to "F", the pin for the grid is set to "P" and neutral pins are switched to "N". Set the test switch to "quality". Select the right heater voltage and you are ready to rock.
A real more accurate manual can be found in the one of the links on the link page.
Have fun.
