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Topic: Transformer hum |
Michael Heaphy
From:
New York, USA
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Posted 5 Feb 2023 5:51 am |
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Hello friends,
Just wondering...I have an older Black Box with the Vari-Z Control and an attached power supply made by Motorola. There is a discernable hum in the transformer not the Box when you plug it in. I don't really remember that in past Black Boxes I've had. Any one notice this, too, or has the power supply gone bad ?
Best Regards, Mike |
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Dave Grafe
From:
Hudson River Valley NY
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Posted 5 Feb 2023 7:46 am
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Is this hum induced in the pickup and coming from the speaker or is just the wall-wart itself making noise? The first can usually be addressed by repositioning the power supply, the second would indicate getting a new wall-wart. It might run for ages but then again it might not.
If you are near enough I would be happy to help you troubleshoot, let me know. |
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Jon Light
From:
Saugerties, NY
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Posted 5 Feb 2023 8:40 am
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I had to come back to this a couple of times because of my confusion. And I realize now, I think, that you mean that the internal transformer is physically humming. And I presume it is not affecting the signal?
No wall warts on a BB. Just the early ones with a fixed ac cord and then the later ones with the detachable iec cord.
I'll be interested in learning what it means when a transformer hums. Can't help -- sorry. |
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