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Nickthedentist · 21st Oct 2020, 10:53 am

The only other thing I'd try with the speaker is driving it from a signal generator so that you can hear it at its worst, then flexing the chassis slightly to see if you can find a "sweet spot" where the rubbing is minimised. Tightening the mounting nuts unevenly, or adding shims (washers) can sometimes make things better.

21st Oct 2020, 10:53 am	#24
Nickthedentist Dekatron Join Date: Jan 2005 Location: Oxford, UK. Posts: 17,859	Re: HMV 2152 Restoration The only other thing I'd try with the speaker is driving it from a signal generator so that you can hear it at its worst, then flexing the chassis slightly to see if you can find a "sweet spot" where the rubbing is minimised. Tightening the mounting nuts unevenly, or adding shims (washers) can sometimes make things better.