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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: Re: Use a larger bulb posted by JJ Analog on November 5, 2002 at 10:21:35:
The dimmer the light bulb gets, the *lower* the resistance across the filament. When not glowing, the resistance drops down to several ohms.When powering up the amp, that's when the bulb should glow its brightest. And afterward, it should get dim to the point where it's barely glowing. A single 100-watt bulb generally does the trick with moderately-powered tube amps.
You may also want to try a 220-volt bulb for such an application (110-volt circuit).
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Follow Ups
- Light Bulbs Do Not Have Constant Resistance - Todd Krieger 11:05:12 11/05/02 (5)
- Re: Light Bulbs Do Not Have Constant Resistance - JJ Analog 15:43:00 11/05/02 (4)
- Re: Light Bulbs Do Not Have Constant Resistance - mkmelt 21:16:04 11/05/02 (3)
- Re: Light Bulbs Do Not Have Constant Resistance - brobertson 16:25:43 11/06/02 (2)
- It's Perfectly Normal... - Todd Krieger 08:44:14 11/08/02 (1)
- Re: It's Perfectly Normal... - brobertson 16:51:03 11/08/02 (0)
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