dor123
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This is even when i attach the side of the frame wire of the lamp to the globe. Only when i attach the base of the lamp, an argon negative glow appears between the first electrode and the third starting electrode. Why?
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I"m don't speak English well, and rely on online translating to write in this site. Please forgive me if my choice of my words looks like offensive, while that isn't my intention.
I only working with the international date format (dd.mm.yyyy).
I lives in Israel, which is a 220-240V, 50hz country.
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Ash
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No enough potential difference - no discharge
The potential on 2 electrodes probably was too close. You can try it again, but touch one contact n the lamp base with something connected to earth (like yourself), now maybe itll light
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dor123
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The glow discharge also appeared when i toughed the base while i attached the lamp to the plasma ball. fluorescent lamps glow even when attaching their glass to the plasma globe. Medved knows better.
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I"m don't speak English well, and rely on online translating to write in this site. Please forgive me if my choice of my words looks like offensive, while that isn't my intention.
I only working with the international date format (dd.mm.yyyy).
I lives in Israel, which is a 220-240V, 50hz country.
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Ash
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I drawn something for you
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Medved
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@Ash: This woul be valid only, if there is no discharge. Once the discharge strike somewhere, you have to treat it's path like a conductor. So e.g. probe-less lamp would glow trough the whole aectube length, the lamp with the starting probe would glow only on the probe...
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Ash
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Assuming very low current, the volt drop on the starting resistor is negligible
In the example above, lets assume that 150 V was enough to strike the arc and then the struck arc clamps it down to 80 V
Those 80 V appear between main electrodes and between one main and starting probe
Electric field = voltage / distance, so the field at the starting probe is strongest, and there the arc will take place
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Medved
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The arc would take place only on the starting probe, but due to the low current, I doubt it would be visible (maybe only in the dark). The voltage would be clamped to only few 10's of V, way not enough to ionise the gas elsewhere...
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