I tested hundreds of tubes such as 245, 2A3, 250 ,171A ,226 , 227 , 6V6 , 7027 EL156 , 350B etc. And I would like to share my experience, tube testing is aimed for the percentage life of a tube we want to know. The extent of understanding to the test results greatly depends…
A tube curve tracer can display the comprehensive information of the tube status in graphical mathod. This is almost telling everything we really want. Commercial tube curve tracer is expensive but a simple home built curve tracer is not too far difficual. In late 1970 the TTL (transistor_transistor logic) and CMOS ( compelmentary metal oxided…
There are two major types of tube testers: Simple emission tester Dynamic mutual conductance (GM) tester The Emission Tester – is simple that the grid of the tube under tested is connected to the cathode itself then only plate and cathode being left, somewhat likes a diode and then connected series with a variable resistor…