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Toroid soft start
Toroid soft start
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Old 27th April 2005, 01:14 AM   #21
carlosfm is offline carlosfm  Portugal
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Join Date: Mar 2003
Location: Lisbon, Portugal
Quote:
Originally posted by Bakmeel
The simplest thing would obvious be the thermistor trick as you all know. When they heat up, the resistance falls and you have an instant soft start.
That's what Krell uses on the KAV-300IL integrated amp, which has a 734VA toroid.
Simple as that.
Works fine.
A 10W / 420V VDR does the trick, and it costs 1.
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Old 27th April 2005, 01:34 AM   #22
lgreen is offline lgreen  United States
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Join Date: May 2003
Location: San Diego, USA
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I've made some soft start boards. Due to the requirement of minimum order, I've got a few extra. I'd be willing to part with a few, any interest, just email offline. Full description at the link provided, if you want to know how it works. Fyi, you need separate PS. I've got extra MOSFETs for this and potentially some other parts so if you need anything let me know.
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