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

vampyretim · 18th Jun 2019, 5:44 pm

Hi all,

Hiss is very audible, the noise is definitely coming from the 5-10 and not the preamp and is unaffected by volume. I'm using the 1x setting on my probe.

The 1M resistor connecting the ECC83 grids is a carbon composite type and I'm seeing the spiky noise on one side of that resistor only, it might be unrelated.

I have fixed a few solder joins today and there might be a few more that need redoing.

18th Jun 2019, 5:44 pm	#77
vampyretim Heptode Join Date: Aug 2011 Location: Bristol, UK. Posts: 538	Re: Mullard 5-10 amplifier Hi all, Hiss is very audible, the noise is definitely coming from the 5-10 and not the preamp and is unaffected by volume. I'm using the 1x setting on my probe. The 1M resistor connecting the ECC83 grids is a carbon composite type and I'm seeing the spiky noise on one side of that resistor only, it might be unrelated. I have fixed a few solder joins today and there might be a few more that need redoing.