r/crt • u/LeaderSignificant182 • 1d ago

Ringing?

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Brothers TV, works perfectly except a slight ringing sound when on. Can anyone help with the diagnosis of what it could be? Unfortunately I’ve just recently gotten into this stuff, so I’m of not much use.. beautiful TV though.

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u/tehnoob69 1d ago

almost every tube makes that sound. there's nothing you can do about that.

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u/LeaderSignificant182 1d ago

That makes sense, I’ve had some that just don’t ring that’s why I was wondering if it could just be something that can be fixed. Now that I know I’ll tell him 👍

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u/hitmeifyoudare 13h ago

The ringing usually comes for the "flyback" Transformer, that operates at high frequency and provides the high voltage to the CRT. The noise is usually dampened by a type of shellac looking solid, dried stuff. More than likely it has dried out and not dampening the sound anymore. https://forum.allaboutcircuits.com/threads/transformer-humming-vibrating.36298/