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Trevor · 21st May 2019, 4:48 pm

I used to retail the 405 back in the day changed loads of transformers they used to hum !
Never did try the dc blocker with them this may be the problem The transformers are not a toroid in that the are oblong rather than a doughnut
Trev

21st May 2019, 4:48 pm	#4
Trevor Octode Join Date: Aug 2006 Location: Stoke-on-Trent, Staffordshire, UK. Posts: 1,082	Re: Quad 405 hum I used to retail the 405 back in the day changed loads of transformers they used to hum ! Never did try the dc blocker with them this may be the problem The transformers are not a toroid in that the are oblong rather than a doughnut Trev