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Old 4th Dec 2022, 9:47 pm   #16
Jolly 7
Octode
 
Join Date: Feb 2018
Location: Southampton, Hampshire, UK.
Posts: 1,063
Default Re: Noise issue with DIY variable PSU and audio amplifier

Quote:
Originally Posted by Terry_VK5TM View Post
It would help if we knew where the "hum" was coming from.

Does it come out of the speaker, is something else "humming" - the transformer perhaps.
Hi Terry
The hum is definitely from the speaker and very loud with a grating like sound.
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