11-02-2023, 11:46 AM
(This post was last modified: 11-02-2023, 11:47 AM by Radio Fixer.)
I would have thought it wasnt the cap. But, if it has silicon diodes for rectifiers, you could safely tack another across the smoother and then power up and see if there is any improvement. If the rectifier is valve you shouldnt do it unless there is choke or resistor between it and the reservoir cap (there must be). Beware increasing the size of reservoir cap which may exceed the valve spec.
Are you listening to anything music, speech and a fair distance away?
With nothing, and the volume turned up, and the head alongside the speaker it may not be realistic. Very easy to spend time tracing minimal hum which for normal listening doesnt matter.
Doesnt sound like an input fault: very easy for external equipment to make hum loops. This often comes down to only having one mains earth to say the amp or turntable and letting the other get its earth via the screening of the audio cable.
Gary
Are you listening to anything music, speech and a fair distance away?
With nothing, and the volume turned up, and the head alongside the speaker it may not be realistic. Very easy to spend time tracing minimal hum which for normal listening doesnt matter.
Doesnt sound like an input fault: very easy for external equipment to make hum loops. This often comes down to only having one mains earth to say the amp or turntable and letting the other get its earth via the screening of the audio cable.
Gary
