|2nd February 2011, 05:18 PM||#11|
Join Date: Jan 2011
my only reason for using an NTC is to limit the inrush current so that I can use an appropriately rated fuse. Again, you can use a resistor to perfom the same function. Either one should be short-circuited by a relay after a little while.
Slow-start circuits are a different ball of wax: I do use them for my DC filament power supplies, hopefully increasing tube lifetime. I also delay the application of HV to the tubes. In your initial question, you mentioned a 50000 µF capacitor -- it's obvious that we are not talking tubes here. I do not have any experience with solid-state amps and vacate the turf for people more knowledgeable than me. I cannot really comment on the effect of slow-start circuits on solid-state audio equipment.
All the best,
|3rd February 2011, 08:29 AM||#12|
Join Date: Jul 2004
Location: Scottish Borders
It's standard for transformers and motors.
You state "somewhat higher rating".
That "somewhat" equals 3.
As I went on to say, if you want instead to use close rating then a soft start of some type must be used to allow the lower fuse rating to survive repeated start ups.
regards Andrew T.
Sent from my desktop computer using a keyboard
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