Bottlehead Forum
Bottlehead Kits => Mainline => Topic started by: Bourney on December 16, 2022, 04:20:57 PM
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Hi all,
Hoping someone can educate me on the purpose of the fibre shoulder washers used to mount the OT3s.
I can see they are insulating the screw from the chassis, but then we connect the OT3 and the screw to the main ground lug anyway.
Is the aim to achieve a single point of ground? Or are we trying to insulate from possible vibration from the transformer?
Thanks for any guidance you can share.
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Yes, it's to provide a single point chassis (safety) ground. It kills one of the many possible causes of hum and/or radio interference.