PT hum noise [resolved]

peterq · 1731

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Offline peterq

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on: April 09, 2021, 09:25:45 PM
Hi,
I can hear some PT hum although it's very low, but it's still there. The hum noise could be decreased a lot when I touch the panel, is there a way to solve this issue? I see the amp properly connects power ground wire. Thanks.
« Last Edit: April 18, 2021, 07:13:34 AM by Paul Birkeland »


Offline Paul Birkeland

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Reply #1 on: April 09, 2021, 09:43:58 PM
Are the screws nice and tight?

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline peterq

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Reply #2 on: April 09, 2021, 09:51:35 PM
Hi Paul,
I didn't expect you to reply this late time. It's my bad, I put amp on a small desk, when I put a heavy item on the amp, the noise stopped. It looks like there are something has resonance when I turn on the amp.


Offline Paul Birkeland

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Reply #3 on: April 09, 2021, 10:15:35 PM
I would suggest tightening the power transformer screws.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline peterq

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Reply #4 on: April 18, 2021, 07:10:30 AM
I put the amp on a more robust shelf and pt hum is away. Thanks PB.


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