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Can anyone identify this inductor?

Its a speaker crossover from a well known brand. Most coils on it are standard air coil style... but one looks like a transformer - wound vertically around a HUGE iron core which protrudes out the sides, then varnished/sealed and puttied to the board. Stamped with the company’s name on it. (All other components look sourced).

I reached out to the company waiting for an answer, so I won’t mention the name. But I don’t think they will reply.

Iron inductors seem like a no-no. In fact, I got huge coherency improvements by taking anti-static and EMI measures on it with some usual hi-fi tweak products. I do not know if they even tried to orient it correctly.

Anyone know? cheers

 

 

clustrocasual
carlsbad's avatar
carlsbad
1,551 posts
 

I've got the parts but they were slow to arrive and now I'm in the vacation season so I haven't done the work yet.   I'm chaning all the inductors in my crossovers to wax/foil inductors. Some existing are iron core, some are not.   Replacements are Much larger.  the heaviest ones weight just over 5 lbs.  

Upgrading your inductors (and caps and resistors) is a fairly expensive but quite useful upgrade to most speakers under $50k.  And a good upgrade for many more expensive speakers as well.

Measure the inductance and order 2 upgraded replacements (one for each speaker).  While at it, upgrade other components on the crossover.  

Jerry

imhififan's avatar
imhififan
2,211 posts
 

If it only has 30 turns winding and two leads, It could be an C core inductor for woofer low pass filter, because of its extremely low resistance!

clustrocasual OP
103 posts
 

Well I can't be sure of the leads (crossover glued in place to the PCB), but it looks identical to the photo I posted but with 30 windings that I can count. Has the same Lundhal (F) marking but no logo.

Sounds like its just a high quality inductor manufacturer chose?

 

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