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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: tube flash posted by dstrachangolf on September 22, 2004 at 09:30:06:
Tube flash is caused by the cold filament having a point of higher resistance (usually near the pin at the base), which will take on most of the voltage potential initially applied across the filament, hence glow brightly. When the rest of the filament heats up, the voltage potential becomes distributed across the filament, and will glow normally.A filament that "flashes" takes longer to glow normally, because the "flashing" portion of the filament resists current flow through the entire filament. This could be an issue if used in a device with solid-state or direct-heated rectification, where the instant B+ is more-likely to be applied to an insufficiently-heated cathode, which can shorten tube life.
Aside from that, there should be virutally no problem.
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- Re: tube flash - Todd Krieger 21:54:30 09/22/04 (0)
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