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Old 24th December 2012, 09:16 PM   #1
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Default Recommendation for a crossover choke

hi
I need two 0.47mH chokes. They need to be aircore and decently low DCR. I have a small budget. Any recommendation?

for your information, my crossover is:
For the Tweeter the resistors are 4R7 in series and 6R8 in parallel. Choke is 0.47mH and Capacitor is 1.5uF.

For the Midrange the RC across the driver is 12 Ohm and 4.7uF. The crossover Capacitor and Inductor for the Lowpass are 2.2uF and 0.5mH.

thanks
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Old 24th December 2012, 09:40 PM   #2
sreten is offline sreten  United Kingdom
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Hi, Beer budget is wind them yourself using a inductor calculator, rgds, sreten.
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Old 24th December 2012, 10:50 PM   #3
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well, lets say cheap wine budget. Dont want to do my own chokes... there a panoply of different chokes to choose from. Any recommended brand?
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Old 24th December 2012, 10:53 PM   #4
ScottG is offline ScottG  United States
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When it comes to "cheap" - just go with whatever brand will give you the right value at the right price.

Most of the differences come down to resistance.
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Old 24th December 2012, 11:08 PM   #5
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really? so what type of resistor to use?
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Old 25th December 2012, 02:09 AM   #6
ScottG is offline ScottG  United States
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Quote:
Originally Posted by murphythecat8 View Post
really? so what type of resistor to use?
..the resistance of the coil itself.

I think for inductors (beyond it's own resistance) it's about mechanical damping - solution there is just "pot" the thing in some higher temp. wax (..or resin, but I'd prefer the wax).



-resistors (beyond resistance) can and do sound different depending on the application, again likely a mechanical damping effect.
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Last edited by ScottG; 25th December 2012 at 02:27 AM.
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Old 25th December 2012, 03:36 AM   #7
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Okay, I thought you mean that the resistors in my crossover need to be of high quality? Is that also the case, like in the tube amp, where the cathode ressitor must be different then the plate resistors, ect

can you help me to find good chokes: they need to be aircore and decently low DCR. Theres too much choice at newark, I have no idea which to pick really....
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Old 25th December 2012, 03:41 AM   #8
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what is a good decent low dcr value?
this is 0.22 ohm, is that decently low?
B82792C2474N315 - EPCOS - CHOKE, QUAD, 0.47MH | Newark/element14 Canada
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Old 25th December 2012, 03:47 AM   #9
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I ahve 700 result at newark with chokes of 0.47 mh
Your Search Results | Newark/element14 Canada | Results

please somebody help
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Old 25th December 2012, 04:22 AM   #10
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Erse has a good selection, prices are good, and shipping to Canada is reasonable.
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