UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Mullard 5-10 amplifier

vampyretim · 10th Jun 2019, 10:00 pm

Hi guys,

I've swapped out quite a few of the valves to see if that was causing hum but I've only got a couple of ecc83's at the moment and I needed two for the control unit. I did try a few nos Mullard EF86's though so it's not that. When I took one side of the EL34's out the hum reduced significantly so I replaced that valve but the hum was still there.

I replaced all electrolytics and waxies. I will try a different ecc83 tomorrow.

Thanks guys

10th Jun 2019, 10:00 pm	#4
vampyretim Heptode Join Date: Aug 2011 Location: Bristol, UK. Posts: 538	Re: Mullard 5-10 amplifier Hi guys, I've swapped out quite a few of the valves to see if that was causing hum but I've only got a couple of ecc83's at the moment and I needed two for the control unit. I did try a few nos Mullard EF86's though so it's not that. When I took one side of the EL34's out the hum reduced significantly so I replaced that valve but the hum was still there. I replaced all electrolytics and waxies. I will try a different ecc83 tomorrow. Thanks guys