Inductor question

rs1026 · 5th January 2005, 09:53 AM

I have few inductors.It has 820uh and 220uh wirrten on it.However it looks like a resistor. i.e the shape looks like a resistor.It is sealed hence I dont know how exactly this might have been fabricated.Can any one let me know what type of iductors are these.They dont look like Surface mount type.

I generally had an impression that inductors will be wound on some material that constitues as its core.In this case I am not able to figure out anything.
Are these inductors good enough to be used for a passive filter??

audiousername · 5th January 2005, 10:22 AM

It's probably some sort of little RF inductor/choke.

Looks like this?

Then it's one of these.

audiousername · 5th January 2005, 10:25 AM

Quote:

Originally posted by rs1026
I generally had an impression that inductors will be wound on some material that constitues as its core.In this case I am not able to figure out anything.
Are these inductors good enough to be used for a passive filter??

What kind of passive filter? If you're talking about a loudspeaker crossover network, no. Rdc = 7.7 ohm for the 0.47mH (470uH) choke.

rs1026 · 5th January 2005, 10:37 AM

Yeah it was infact for loud speaker cross over.It looks quite similar to the picture you have posted.So I think it might be a RF choke inductor.

5th January 2005, 09:53 AM	#1
rs1026 diyAudio Member Join Date: Jul 2004 Location: Bangalore	Inductor question I have few inductors.It has 820uh and 220uh wirrten on it.However it looks like a resistor. i.e the shape looks like a resistor.It is sealed hence I dont know how exactly this might have been fabricated.Can any one let me know what type of iductors are these.They dont look like Surface mount type. I generally had an impression that inductors will be wound on some material that constitues as its core.In this case I am not able to figure out anything. Are these inductors good enough to be used for a passive filter??

5th January 2005, 10:37 AM	#4
rs1026 diyAudio Member Join Date: Jul 2004 Location: Bangalore	indeed Yeah it was infact for loud speaker cross over.It looks quite similar to the picture you have posted.So I think it might be a RF choke inductor.

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5th January 2005, 10:22 AM	#2
audiousername diyAudio Member Join Date: Jul 2004 Location: Melbourne, Victoria	It's probably some sort of little RF inductor/choke. Looks like this? Then it's one of these.

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