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TIMTAPE · 29th Jan 2019, 6:03 am

Yes, unusual compared to later heads which are usually potted in some sort of epoxy, making internal repair virtually out of the question.

29th Jan 2019, 6:03 am	#20
TIMTAPE Octode Join Date: Jul 2006 Location: Perth, Western Australia Posts: 1,969	Re: Ferrograph 4A: Restoration advice needed Yes, unusual compared to later heads which are usually potted in some sort of epoxy, making internal repair virtually out of the question.