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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Blowing Fuses - Time Delay Question posted by Paully on December 9, 2006 at 14:40:59:
Paully,The 6X4 in your custom FP starts SLOWLY. The only thing I can think of that's causing trouble is LARGE inrush current in a DC heater supply.
You can slow the heater supply down a little with a negative temperature coefficient (NTC) thermistor. The thermistor heats due to I^2R losses in its resistance. As the thermistor heats, its resistance drops and a point of equilibrium is reached. I've linked the Mouser catalog page for this sort of stuff. You should be able to select a suitable part.
Eli D.
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Follow Ups
- Re: Blowing Fuses - Time Delay Question - Eli Duttman 15:19:49 12/09/06 (6)
- Thanks Eli - we have AC on the 12au7's - Paully 17:24:07 12/09/06 (5)
- Re: Thanks Eli - we have AC on the 12au7's - Eli Duttman 17:57:02 12/09/06 (4)
- Haven't seen a flash - Paully 18:40:04 12/09/06 (3)
- Re: Haven't seen a flash - Tom Bavis 07:45:32 12/10/06 (2)
- Thanks - Paully 08:10:09 12/10/06 (1)
- Thanks, etc. - Eli Duttman 09:29:35 12/10/06 (0)
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