Broken Drum Core Inductor

SlunkBoy · 15th December 2008, 06:03 PM

I noticed a rattle in my oscilloscope case when I took it out of storage after a move. One of the dumbbell shaped drum core inductors had broken at the point where the shaft meets the bottom disc. The coil has only unraveled a few turns and I think I can salvage it if I work carefully. Assuming I am able to situate everything back where it was, will I compromise any electrical or magnetic properties by supergluing the disc back to the shaft?

Thanks in advance,
Nick

Steerpike · 15th December 2008, 08:15 PM

You can glue the core, without significantly altering the properties of the inductor, but i woudn't recommend superglue (by which term I think you mean cyanoacrylate?).
Two-part epoxy is a much better product. If possible, clamp the two core portions lightly in a vice or similar arrangement to minimise the thickness of glue bond.

SlunkBoy · 15th December 2008, 09:54 PM

Thank you very much for the prompt reply, Steerpike. I'll give the epoxy/clamp method a shot.

-Nick

15th December 2008, 06:03 PM	#1
SlunkBoy diyAudio Member Join Date: Jan 2007	Broken Drum Core Inductor I noticed a rattle in my oscilloscope case when I took it out of storage after a move. One of the dumbbell shaped drum core inductors had broken at the point where the shaft meets the bottom disc. The coil has only unraveled a few turns and I think I can salvage it if I work carefully. Assuming I am able to situate everything back where it was, will I compromise any electrical or magnetic properties by supergluing the disc back to the shaft? Thanks in advance, Nick

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15th December 2008, 08:15 PM	#2
Steerpike diyAudio Member Join Date: Jan 2006 Location: Johannesburg, South Africa	You can glue the core, without significantly altering the properties of the inductor, but i woudn't recommend superglue (by which term I think you mean cyanoacrylate?). Two-part epoxy is a much better product. If possible, clamp the two core portions lightly in a vice or similar arrangement to minimise the thickness of glue bond.

15th December 2008, 09:54 PM	#3
SlunkBoy diyAudio Member Join Date: Jan 2007	Thank you very much for the prompt reply, Steerpike. I'll give the epoxy/clamp method a shot. -Nick