Re: AZ31 as rectifier for a stereo Mullard 3-3?
Neither of my 3-3s have centre tapped heaters, one side is grounded at one point only and the valves are fed via twisted cables. Hum is negligible, you need your ear to the speaker before being able to detect the hum.
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Cheers,
Trevor.
MM0KJJ. RSGB, GQRP, WACRAL, K&LARC. Member
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