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Old 26th Jan 2021, 5:28 pm   #8
G6Tanuki's Avatar
Join Date: Apr 2012
Location: Wiltshire, UK.
Posts: 10,158
Default Re: Stuck Ferrite IF cores.

To lock cores my preference is the old very-thin-rubber-filament thing: elastic is a good source of this [though don't go cutting-up your other half's underwear].

Over time the rubber perishes, but the fragments still work to stop the core unscrewing - and if anything the perishing will make it easier to remove the core again in 20 years time.
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