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Old 8th September 2014, 08:30 PM   #1
graygem is offline graygem  United States
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Default How to take apart PQ Ferite

Is there any easy way of taking a glued PQ ferrite core apart from a transformer without breaking it all to pieces?
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Old 19th September 2014, 02:09 AM   #2
dangus is offline dangus  Canada
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Soaking in an aggressive solvent like lacquer thinner might work. Immerse it in a sealed jar and leave it for few days.
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Old 19th September 2014, 05:55 AM   #3
graygem is offline graygem  United States
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Thanks for the reply.
I don't really want to destroy the windings.
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Old 19th September 2014, 06:57 AM   #4
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I do this with a hot air gun, delivering 200~300C over several minutes - this takes some patience.
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Old 19th September 2014, 07:42 AM   #5
JMFahey is offline JMFahey  Argentina
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Quote:
Originally Posted by graygem View Post
Thanks for the reply.
I don't really want to destroy the windings.
You can't win both ways, either you smash ferrite with a hammer and recover an intact winding or dissolve Epoxy ... and wire insulation which is far weaker than it.

And the heat gun will eventually soften Epoxy ... at around 250/300 DegC ... but plastic bobbin will deform before reaching 100 DegC , will melt above that and popular "self soldering" wire enamel starts evaporating above 130DegC

Sorry but that HF transformer was not meant to be disassembled.
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