Bottlehead Forum

Bottlehead Kits => Stereomour II => Topic started by: peterq on April 09, 2021, 09:25:45 PM

Title: PT hum noise [resolved]
Post by: peterq 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.

Title: Re: PT hum noise
Post by: Paul Birkeland on April 09, 2021, 09:43:58 PM

Are the screws nice and tight?

Title: Re: PT hum noise
Post by: peterq 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.

Title: Re: PT hum noise
Post by: Paul Birkeland on April 09, 2021, 10:15:35 PM

I would suggest tightening the power transformer screws.

Title: Re: PT hum noise
Post by: peterq on April 18, 2021, 07:10:30 AM

I put the amp on a more robust shelf and pt hum is away. Thanks PB.