[M Caldeira] necessary to examination a tube and did not have a spare to do the aged swap take a look at. He also didn’t have a tube tester helpful. Drawing inspiration from a 2015 movie, he managed to cobble up an advertisement hoc tube tester making use of things about the workbench. You can see a online video of the method underneath.
To replicate his effort, you are heading to have to have a few meters. Excellent thing they are rather low-cost these times. Usually, a tube tester has a way to adjust all the distinctive parameters for the tube, but there is no rationale you simply cannot just set all those parameters working with your testbench electricity provides.
Of program, which is going to call for superior voltage ability supplies. You will not be in a position to use a USB port to electric power most tubes. A simple test board offers the suitable bias and easy ways to hook up the electricity supplies. Just one provide powers the heater, even though other electric power materials travel the other voltages. A compact DC to DC converter delivers the superior voltage B+ line from 12V enter.
Viewing the tube in operation is definitely one particular way to check it. The days when tube testers have been everywhere are lengthy long gone. But you can nonetheless uncover some exciting kinds on the used industry if you really require to take a look at a great deal of tubes. If you are really determined, you can even make your individual tubes.
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