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Differences in inductors?
Differences in inductors?
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Old 29th June 2003, 05:49 AM   #1
leadbelly is offline leadbelly  Canada
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Differences in inductors?
Default Differences in inductors?

I'm scrounging through recycled parts to find suitable inductors for a PS CRC filter for my tube IGC (see JLTi thread).

Is one of the following types of inductors more suitable for a CRC filter (other than the obvious differences in inductance and compactness)? The one on the left is from a speaker crossover and measures 0R6, and the one on the right is from a switching PS and measures 0R3:
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Old 29th June 2003, 07:43 AM   #2
Sch3mat1c is offline Sch3mat1c  United States
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You mention tubes (though I don't find the thread on that board); I can only assume your power supply will operate on 50 or 60Hz.

The chokes shown are for filtering HF; the speaker crossover for cutting high-F audio, the line filter for >50kHz to remove line noise from switching supplies, which would otherwise put unacceptable junk upstream of the supply.
You need a choke which looks more like a transformer, one with an iron core.

Tim
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Old 29th June 2003, 07:53 AM   #3
roddyama is offline roddyama  United States
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Leadbelly,

The one on the right is a common-mode-choke. Here are some threads on these.
http://www.diyaudio.com/forums/showt...mon+mode+choke
http://www.diyaudio.com/forums/showt...mon+mode+choke
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Old 29th June 2003, 04:50 PM   #4
leadbelly is offline leadbelly  Canada
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Differences in inductors?
Thanks.

Well, it sounds like neither of those is very good. Would another inductor from a xover work, one with a laminated steel core?

This is for the tube IGC in Chip Amp forum. Draw is on the order of milliamps, so I just want to recycle something from the tons of parts I have.
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