Replacing a inductor/coil/choke on ESS AMT1B

mrappe · 17th January 2012, 06:45 PM

I was re-capping my crossover with poly caps and had to drill a hole in the board and accidently caught one of the coils and broke some of the wires. I have put them back together and rewound it on a 1" wooden stick to form it but i would like to replace it with the same value. How can I find or make a replacement? I don't have the schematic and need to find out where I could find another coil or make one.

badman · 17th January 2012, 07:05 PM

You can measure the same coil on the other speaker, which would get you close enough. You would need some method of reactance measurement, or you could do it the "hard way" by noting current loss through the coil at different source voltages and frequencies.

mrappe · 17th January 2012, 08:17 PM

The only thing I have is a digital multimeter. If I measure the length of the wire and have the other dimentions and the ga of the wire would it not be equivalent?

mrappe · 21st January 2012, 04:58 PM

I found this site Special Edition Accurate LC Meter Kit with Green Backlight LCD - <font color=green>FREE CASE</font> - Electronics-DIY.com
This might be a good way to measure the other coil. Does anyone know anything about this meter?

17th January 2012, 06:45 PM	#1
mrappe diyAudio Member Join Date: Jul 2007	Replacing a inductor/coil/choke on ESS AMT1B I was re-capping my crossover with poly caps and had to drill a hole in the board and accidently caught one of the coils and broke some of the wires. I have put them back together and rewound it on a 1" wooden stick to form it but i would like to replace it with the same value. How can I find or make a replacement? I don't have the schematic and need to find out where I could find another coil or make one.

17th January 2012, 07:05 PM	#2
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	You can measure the same coil on the other speaker, which would get you close enough. You would need some method of reactance measurement, or you could do it the "hard way" by noting current loss through the coil at different source voltages and frequencies. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

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17th January 2012, 08:17 PM	#3
mrappe diyAudio Member Join Date: Jul 2007	The only thing I have is a digital multimeter. If I measure the length of the wire and have the other dimentions and the ga of the wire would it not be equivalent?

21st January 2012, 04:58 PM	#4
mrappe diyAudio Member Join Date: Jul 2007	I found this site Special Edition Accurate LC Meter Kit with Green Backlight LCD - <font color=green>FREE CASE</font> - Electronics-DIY.com This might be a good way to measure the other coil. Does anyone know anything about this meter?

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