How to Make a Vacuum Diode

Step-by-Step Guide

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   Step 1: File the top of a 200 watt light bulb open to create a 1/4 " hole

   Make sure the seal is tight though! Tight seals are vitally important for this project!, This must not touch the filament!get it as close to the filament as possible.,, Seal a tube of glass to the area around the hole that you made. make this about 2-1/2 inches long.,,, This should be at least 120 (house) volts.
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   Step 2: letting the vacuum out of the bulb.

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   Step 3: File the side open to forum a 1⁄4 inch (0.6 cm) hole .

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   Step 4: Stick a clothes hanger in the inside of the bulb with a loop with a slight curl on the end and lay this around the filament

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   Step 5: but make sure it doesn't touch it.

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   Step 6: Seal the top end shut by getting the top of the bulb red hot and touching a piece of broken glass against it and let it melt.

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   Step 7: Stick the second piece of wire into the other hole

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   Step 8: making sure the second wire gets close to the place where the first wire almost touches the filament.

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   Step 9: Seal this connection shut as you did the last.

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    Step 10: File a third 1⁄4 inch (0.6 cm) hole in the other side of the bulb.

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    Step 11: Attach the pump to the end of the tube and pump out as much air as you can.

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    Step 12: Get the tube red hot and pinch it together with a pair of pliers.

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    Step 13: Power the bulb from the bottom as normal

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    Step 14: feed the current to be rectified through the top two leads.

Detailed Guide

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