Beam Of Light flutter - Printable Version

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+--- Thread: Beam Of Light flutter (/showthread.php?tid=25450)

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Beam Of Light flutter - alangard - 12-13-2024

I've completed restoration of a 1941 BOL changer.  It plays fine at lower volumes.  However, if I turn up the volume past a certain point, there's a low frequency flutter through the speaker and I see the light in the tonearm fluttering in brightness in sync with the sound flutter.

Any suggestions?

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RE: Beam Of Light flutter - alangard - 12-13-2024

duplicate reply

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RE: Beam Of Light flutter - alangard - 12-13-2024

It also flutters with the tonearm unplugged and only on the phono setting - radio settings are fine.  So, I suspect the phono preamp section is going into oscillation for some reason.  Worked fine for several days, and now won't stop the fluttering.

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RE: Beam Of Light flutter - MrFixr55 - 12-14-2024

Check the circuit that drives the exciter lamp. The clue is that you see it flutter.

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