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Old 10th Jun 2019, 9:54 pm   #3
Sideband
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Join Date: Oct 2003
Location: Croydon, Surrey, UK.
Posts: 7,549
Default Re: Mullard 5-10 amplifier

Quite simply put THEY DON'T HUM if everything is working correctly. In practice there is very slight residual hum if you put your ear to the speaker with the volume at zero. If you have recapped it, does that include the smoothing cap? Apart from the ECC83 you should also check the EF86. If this has been changed, I've heard it said that some of them currently supplied are not up to the standard of the original Mullards.

Agree that these are fine sounding amplifiers. Mullard knew what they were doing when they designed it. You shouldn't need to make any changes at all.
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