EM84 Display Tube Test
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Published on ● Video Link: https://www.youtube.com/watch?v=pnT1mRVU54c
A quick test of this EM84 display tube which I found in my collection.
+250VDC on the anode, The grid is being operated between -20VDC and 0VDC. The heater on this tube is 6.3V.
Positive terminal on an isolated bench supply is connected to the ground of the +250V supply to give negative voltage required to drive the grid. The negative is fed into pin 1 via a 1meg resistor to ground.
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Electronics (Field Of Study)